gaotek-advanced-otdr
gaotek-advanced-otdr

GAOTek Advanced OTDR

ID: C0250005tek
Category:

Call for Quote

Product Description

Overview

GAOTek Advanced OTDR is a high performance measuring instrument with multifunction designed for testing FTTx networks. It’s widely applied in the manufacture, construction and maintenance in optical fiber communication system. There is advanced anti-reflection LCD display unit inside and the operating interface is also visible even outdoor. The whole instrument has 4 optical ports to realize the optical power meter, VFL and single mode & multimode testing functions. This product has abundant external ports to externally connect with USB disk & printer and realize data communication with PC by two different USB ports. Test results can be stored in the instrument and also can be stored in SD card by SD port. There is lithium battery with large capacity inside the product which can work for more than 8 hours.

Features

  • Handheld, lightweight and convenient for carrying
  • 45 dB high dynamic range
  • ≤1m extra-short event dead zone
  • 05 m high distance resolution,128 k sampling points
  • Fast auto measurement, one-button operating
  • Test up to four wavelengths with a single unit
  • Communication light check automatically
  • Remote function via Ethernet
  • Double USB interfaces, supporting USB stick and printer and direct cable download to PC via activeSync
  • Supporting bell core GR196 file format in writing or reading
  • Built-in lithium battery with high capacity for over 8 hours of operating life
  • Visible fault locating (VFL) and optical power meter
  • Universal FC/PC,FC/SC,FC/ST connector type, it’s convenient for surface cleaning
  • Unique function of updating application software on-line, returning to factory is unnecessary
  • Extra-short event dead zone
  • Due to its high resolution, Advanced OTDR has 1 m extra-short event dead zone, which is suitable for testing short optical fiber and pigtail optical fiber.
  • High-speed auto analyzation.
  • High-speed auto measurement.
  • Unique PON testing capability.
  • Convenient VFL function.
  • Abundant external interface such as USB, Min-USB, Ethernet, earphone and SD
  • Training via multimedia for operators, which can enable you become a measuring expert within short time.
  • Implementing remote controlling through Ethernet, troubleshooting from long distance for fiber under test.
  • Printing trace and event table
  • Updating application software on-line

Technical Specifications

Distance Uncertainty ± (29.5 in (0.75 m) + sample space + measurement distance×0.003%)
Sampling Resolution 2 in, 4 in, 7.4 in, 20 in, 40 in, 79 in, 158 in, 314 in, 630 in (0.05 m,0.1 m,0.2 m,0.5 m,1 m,2 m,4 m,8 m,16 m)
Distance Range 0.24 mi, 0.49 mi, 0.99 mi,1.98 mi, 3.97 mi, 9.94 mi ,19.88 mi , 39.76 mi, 79.56 mi, 159.07 mi, 318.14 mi  {0.4,0.8,1.6,3.2,6.4,16,32,64,128,256,512km (SMF)}
0.4,0.8,1.6,3.2,6.4,16,32 (MMF of 850 nm)
Pulse Width 5 ns, 10 ns, 30 ns, 80 ns,160 ns, 320 s, 640 ns,1280 ns, 5120 ns,10240 ns, 20480 ns
5,10,30,80,160,320,640,1280 (MMF of 850 nm)
Loss Threshold 0.01 dB
Sampling points up to 128 k
Linearity 0.05 dB/dB
Loss Resolution 0.00 1dB
Memory Capacity ≥800 traces(build-in), ≥65500 traces(2 GB SD storage)
Group refractive index setting 1.00000 to 2.00000 (0.00001 steps)
Distance Unit km, m, kft, ft, mi
Display 640×480, 6.5 in TFT-LCD (touch screen)
Interface USB, Min-USB, Ethernet, earphone, SD
Optical connector FC/SC/ST (universal connector)
VFL 650 nm±10 nm,2 mW (typical);CW/1 Hz
Optical Power Meter wavelength range: 1270 nm to 1700 nm measurement range: -60 to +3 dBm

measurement accuracy: 5% ( -10 dBm, CW)

Power Supply AC adapter 100 V to 240 V, 50/60 Hz, 1.5 A DC:19 V±2 V(2 A) built-in Lithium battery: 4400 mAh, operating time ≥ 8 hours
Operating temperature 14 o F to 122 oF (-10 ℃ to 50 ℃)
Charging temperature 41 o F to 104 oF (5 ℃ to 40 ℃)
Storage temperature   -40 o F to 158 oF (-40 ℃ to 70 ℃)
Storage temperature (Battery) -4 o F to 140 oF (-20 ℃ to 60 ℃)
Dimensions 11.6 in X 7.3 in x 3 in (295 mm ×186 mm×75 mm)
Weight 5.5 lbs (2.5 kg)

Additional Information

Description of Instrument Panel

1. Front Panel of Instrument

2. Right Panel of Instrument

3. Back Panel of Instrument

Operating Instructions

  1. Testing Optical Fiber Chain
  • Operation steps are as follows:

Select test wavelength.

Set test mode, etc. test conditions.

Clean the optical fiber under test.

Connect the optical fiber under test to corresponding OTDR optical output port.

Press to obtain the waveform trace of the optical fiber under test.

After test stops:

  • If in auto test mode or auto analyse after sampling, the instrument will analyze trace automatically, mark event points according to the set loss analyse threshold and give an event list.
  • Otherwise, please press button【Analyse】in main menu bar, the instrument will analyse trace and then it will mark event points according to the set loss analyse threshold and give an event list.

After trace analyse is finished, view test results in event table.

  1. Before test, it must make sure the optical fiber under test without carrying any kind of active signal, otherwise, it could result in permanent damage to the OTDR,

(1) When the test mode is auto test, it will perform analyse automatically and give event list after test stops.

(2) After trace analyse is finished:

  • The event point with splice loss larger than loss analyze threshold will be displayed; the event with splice loss less than loss analyse threshold will be ignored automatically.
  • In event list, the event point with splice loss and reflection loss larger than the set loss pass threshold will be marked with *.
  • When the splice loss of event point is larger than the set optical fiber breakpoint threshold, this event point is taken as the breakpoint of optical fiber; all the events after the event point will not be displayed in list.

1.1 Description of Test Modes, Parameters and Items

Before testing optical fiber link, please set the test mode of OTDR and all test parameters first. The setup window of OTDR test conditions are as shown in below figure.

Figure 1 OTDR test condition setup window

1.1.1 Test Modes of OTDR

The test modes of OTDR include: auto test, real-time test, average test and dead zone test.

(1) The real-time and average test modes are all manual ones, which requires users to set test conditions by themselves ( i.e. range, pulse width and attenuation), the instrument will perform test according to the user’s set test parameters.

(2) In auto test mode, the instrument will automatically set as optical fiber jumper.

  • Auto Test:

In auto test mode, press , OTDR will automatically adjust test conditions to test the link of optical fiber under test, after which it will automatically analyze trace and then display trace and event list in main screen.

  • Real-Time Test:

In real-time test mode, press or press the button 【Start】in main menu bar (then, the menu button 【Start】 turns to 【Stop】), OTDR will perform real-time scanning test to the link of optical fiber under test according to currently set test conditions, the trace in main screen will be refreshed continuously, and until is pressed again or is pressed or 【Stop】in main menu bar is pressed (then, the menu button 【Stop】turns to 【Start】, OTDR stops test.

  • Average Test:

When OTDR is in average test, press or press the button【Start】in main menu bar (then, the menu button 【Start】 turns to 【Stop】), OTDR will perform average test to the link of optical fiber under test according to set test conditions. The trace in main screen will be averaged continuously, and until the average times displayed on interface is equal to the set one, OTDR stops test (then, the menu button 【Stop】turns to 【Start】. Also can be pressed again or is pressed or 【Stop】 in main menu bar is pressed (then, the menu button 【Stop】 turns to 【Start】) to stop test.

  • Dead Zone Test:

The test conditions are fixedly set to: range of 400 m, pulse width of 5 ns and attenuation of 20 dB. Minimum test dead zone can be obtained in this test mode, but the distance that can be tested is also the shortest one. Usually, use this test mode to measure shorter optical fiber, such as optical fiber jumper.

  1. Use real-time test mode to realize real-time observation of the conditions of optical fiber under test.
  2. Use average test mode to obtain more smooth trace with higher SNR, in favour for data analysis and more accurate test results.
  3. In the process of average test, pressing or pressing the button 【Stop】 in main menu bar (then, the menu button 【Stop】 turns to 【Start】) will stop OTDR at any time.
  4. In auto test mode, the instrument will analyze trace and give event list after finishing test. In other test modes, only after “Auto Analyse after Sampling” is selected, the instrument will stop test to analyze trace, otherwise, only when button 【Analyse】 in main menu bar must be pressed, the instrument will analyze trace and give event list.

1.1.2 Test Parameters of OTDR

The test parameters of OTDR include: wavelength, range, pulse width, attenuation, average times, index of refraction, helix, etc.

  • WL: Used to set the test wavelength of OTDR.
  • The number of wavelengths available for OTDR is determined by the module of the instrument, which are 4 for selection maximally.
  • In average, auto and dead zone test mode, it is allowed to select more than one wavelength. In test, the instrument will perform test in turn under each selected wavelength until all the selected wavelengths are tested before it stops. The instrument allows three wavelengths to be selected for test maximally simultaneity.
  • When the module of instrument has single mode and multimode modules at the same time, please pay attention to connecting the optical fiber under test into corresponding test port to ensure correct trace.

  • Range (km): Used to set the range of scanning trace. Advanced OTDR ranges include: 400 m, 800 m, 1.6 km, 3.2 km, 8 km, 16 km, 32 km, 64 km, 128 km, 256 km and 512 km (Max. Optical range is related to the module selected).
  • Pulse (ns): Used to set the width of laser pulse. Longer pulse width can test longer fiber and provides better SNR, smoother trace and lower resolution; shorter pulse width provides higher resolution, but it tests shorter distance and results in worse SNR. The pulse width setting is related to the range selected.
  • Att. (dB): Used to set attenuation of signal. Attenuation can be set to 0dB, 5dB, 10dB, 15dB and 20dB. If value of Att. is minimum (such as 0dB), the fiber length to be tested is maximal, but the near end of fiber may be saturation (A straight line is displayed in screen); If the value of Att. is maximal (such as 20 dB), the fiber length to be tested is minimum and trace SNR is worse but dead zone will be smaller.

(1) If the length of the optical fiber under test is very long, in manual mode, larger value of Att. can be used to test proximal optical fiber and smaller value of Att. can be used to test distal optical fiber section by stages.

(2) Test mode also can be set to auto test. The instrument will set and adjust test conditions (i.e. range, pulse width and attenuation) and display test waveform on LCD completely.

(3) When test range is larger than or equal to 64 km, entirely display trace test mode can be selected. Then, the instrument will automatically adjust pulse width and attenuation in the current range and display test waveform on LCD completely.

  • Times: It is used to set the max. average times of average and auto test. The value of times is between 1 and 4000 in average mode. The value of times is between 5 and 20 in auto test mode. When entirely display trace test function is selected, the average times are 1 or 10 multiple, such as 1, 10, 20, 30, etc.

(1) The larger the average times is, the smoother trace is (i.e. SNR is higher; especially it is helpful for test of longer fiber.

(2) Higher trace SNR is more beneficial for OTDR to test smaller event point.

(3) In auto test mode, more average times will affect auto test speed. Range must be larger than the length of optical fiber under test (it is best to set it to be more than twice the optical fiber under test).

  • IOR: The IOR of optical fiber and optical cable can be obtained from production factory. The value of IOR is set to: 1.00000~2.00000.

Inaccurate IOR setup will result in inaccurate optical fiber length.

  • Optical Cable correction: The setup of optical cable correction coefficient depends on the errors between optical fiber length and optical cable length after optical fiber is made into cable. It can be obtained from optical cable production factory. It can be set to: 0.80000-1.00000. The default value is 1.00000.

Inaccurate optical cable correction setup will result in inaccurate optical cable length.

  • Length Unit: The instrument allows users to set length unit to km or kft. The default length unit is km.
  • Auto Analyse after Sampling: When this item is selected, in real-time, average and dead zone test mode, the instrument will analyze trace, mark event point and give event list automatically after stopping test.

If this item is not selected, in real-time, average and dead zone test mode, the instrument will not analyze trace after stopping test, only after the button 【Analyse】 is pressed in the first menu, the instrument will analyze trace, mark event point and give event list.

  • Locking Maker A & B: Selecting this item will lock the distance between marker A and B, so moving one of them will move both and meanwhile they will keep the distance unchanged. If this item is not selected, when moving one cursor, the other cursor will not move. If this item is only valid during average loss test and reflection loss test, during testing splice loss, four cursors will appear and this item become invalid. In the edit state (adding or adjusting event point) of event table, cursor will be unlocked automatically.
  • On-line Test: This item is only valid in the module with filter. When it is selected, the instrument will connect the filter in optical assembly, and the time, the optical fiber link with active optical signal can be measured in wavelength of 1,625nm or 1,650nm.
  • Low Battery Alarming: In use of battery, when this item is selected, it will give alarm message to remind users of too low battery capacity if the batter capacity is less than 5%.
  • Entirely Display Trace Test Mode: If this item is selected, in measurement of longer optical fiber, larger attenuation (such as 10dB or 15dB) can be used to measure the optical fiber trace near the link under test (i.e. near OTDR test port), but the distal trace will be submerged in noise; smaller attenuation (such as 0dB) can be used to measure the optical fiber trace far away from the link under test, when the proximal trace is saturated to a straight line, the proximal trace cannot be displayed as shown in Figure 2.

Figure 2 Fiber Link measurement in not entirely display trace test mode

After this item is selected, the instrument will adjust test pulse width and attenuation automatically and display the complete trace of fiber link under test from proximal end to end on screen as shown in Figure 3.

Figure 3 Fiber link measurements in full range trace test mode

1.1.3 Test Items of OTDR

The test items of OTDR can be: average loss, splice loss and reflection loss.

After test item is selected, corresponding test results will be displayed in display.

  • Average Loss: Then, the test results displayed on OTDR main screen are: loss between A and B distance between maker A & B and average loss of fiber section between marker A & B as shown in Figure 4.

Figure 4 Average loss tests

In average loss test, marker A & B must be placed on the linear area of fiber trace (as shown in Figure 4 above, otherwise the calculated average loss will have bigger error.

  • Splice Loss: Then, the OTDR main screen will display four markers, and meanwhile test results will include the splice loss at the connection point of marker A, the average loss of previous fiber section before connection point and the average loss next fiber section after connection point as shown in Figure 5.

Figure 5 Splice loss test

  1. During splice loss test, four markers will appear: marker a, A, B and b in turn.
  2. During test, place marker a & A on the linear area of fiber trace before connection point, with marker A near the connection point.
  3. During test, place marker B & b on the linear area of fiber trace after connection point.

Reflection Loss: OTDR main screen displays the reflection loss of fiber reflection peak of marker A & B and the distance between marker A & B.!

  1. During test, place marker A before the reflection peak under test and near the jump of the peak.
  2. During test, place marker B on the top of reflection peak under test.

1.1.4 Event Analyse and Pass Threshold

In the setup interface of OTDR test conditions, event analyses and pass threshold can be set.

  • Loss Analyse Threshold: During trace data analyse, when the calculated splice loss of event point is larger than loss analyse threshold, this event point will be marked, and otherwise, it will be ignored automatically.
  • Splice Loss Pass Threshold: In event list, when the calculated splice loss of event point is larger than the set splice loss pass threshold, the splice loss value will be marked with *.
  • Reflection Loss Pass Threshold: In event list, when the calculated reflection loss of event point is larger than the set reflection loss pass threshold, the reflection loss value will be marked with *.
  • Fiber Breakpoint Threshold: If the splice loss of event point is larger than the set fiber breakpoint threshold, this point will be taken as fiber breakpoint, all the event points after that will be ignored and not be displayed in the list.

1.2 Set OTDR Test Conditions

Set OTDR test conditions at the stopping test state.

1.2.1 Enter OTDR Test Condition Setup Window

Enter OTDR test condition setup window through three methods:

  • Press the test condition display area in the main screen to enter OTDR test condition setup window.

Figure 7

  • Press the【Setup】menu in the main menu bar to enter the setup sub-menu, and then press 【Parameter】menu to enter OTDR test condition setup window.

Figure 8

  • Press the【Setup】key on the following panel to enter OTDR test condition setup window.

 

Figure 9

1.2.2 Set Test Mode

Modify and set test mode through the following description:

Figure 10 Set test mode

  • Touchscreen Operation: Press “Mode” option bar, the active cursor will jump to this option bar; press the button on this option bar to eject a drop-down window with all options, as shown in the above figure. Now press the option to be set. Then press the 【Enter】 menu on the option bar to confirm setting and exit from the setup interface back to the main screen; press【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to “Mode” option; then use to change and set the mode option. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press key to cancel the modification and return to the main screen.

Once the Real-Time test is selected, the average times setting is invalid.

1.2.3 Set Test Item

Modify and set the OTDR test item through the following description:

Figure 11 Set test item

  • Touchscreen Operation: Press “Item” option bar, the active cursor will jump to this option bar; press the button on this option bar to eject a drop-down window with all options, as shown in the above figure. Now press the option to be set. Then press the【Enter】 menu on the option bar to confirm setting and exit from the setup interface back to the main screen; press 【Return】menu on the option bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use keys to move active cursor ( ) to “Item” option; then use keys to change and set the mode option. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press key to cancel the modification and return to the main screen.

(1) There are two markers (marker A and marker B) when the test item is set as average loss or reflection loss.

(2) There are four markers (marker a, marker A, marker B and marker b) when the test item is set as splice loss.

1.2.4 Set Test Wavelength

Modify and set OTDR test wavelength through the following description:

Figure 12 Set test wavelength

The currently displayed optional wavelength is different with the configurated module of the instrument; there are four wavelengths for optional at most.

  • Touchscreen Operation: press any one of wavelength among “Wave” options, the active cursor will jump to this wavelength option; if this wavelength is not be selected, the check box before wavelength will display , after pressing, it indicates the wavelength is selected, the check box before wavelength displays , it indicates to select this wavelength to test; on the contrary, before pressing, this wavelength has been selected, pressing indicates the selection has been cancelled. Then press 【Enter】menu on the menu bar to confirm the setting and exit from the setup interface back to the main screen; press 【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to the wavelength option to be selected; then use to select or cancel selecting this wavelength. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press to cancel the modification and return to the main screen.

1.2.5 Set Test Range

Modify and set OTDR test range through the following description:

Figure 13 Set test range

  • Touchscreen Operation: Press “Mode” option bar, the active cursor will jump to this option bar; press the button on this option bar to eject a drop-down window with all options, as shown in the above figure. Now press the option to be set. Then press the 【Enter】 menu on the option bar to confirm setting and exit from the setup interface back to the main screen; press【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to “Mode” option; then use to change and set the mode option. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press key to cancel the modification and return to the main screen.

(1) The values of range are 400m, 800m, 1.6km, 3.2km, 8km, 16km, 32km, 64km, 128km, 256km and 512km.

(2) It should be increased to a value greater than the fiber length (best twice than the fiber length).

1.2.6 Set Test Pulse Width

Modify and set the OTDR pulse width through the following description:

Figure 14 Set test pulse width

  • Touchscreen Operation: Press “Pulse” option bar, the active cursor will jump to this option bar; press the button on this option bar to eject a drop-down window with all options, as shown in the above figure. Now press the option to be set. Then press the【Enter】 menu on the option bar to confirm setting and exit from the setup interface back to the main screen; press【Return】menu on the option bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use keys to make active cursor ( ) to “Pulse” option; then use keys to change and set the mode option. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press key to cancel the setting back to the main screen.

 

(1) It is allowed that the selected pulse width is in relation with the test range.

(2) A larger pulse width can test the longer fiber, but resulting in less resolution. A smaller pulse width provides higher resolution, but shorter test distance.

1.2.7 Set Test Attenuation

Modify and set the OTDR test attenuation through the following description:

Figure 15 Set test attenuation

  • Touchscreen Operation: Press “Mode” option bar, the active cursor will jump to this option bar; press the button on this option bar to eject a drop-down window with all options, as shown in the above figure. Now press the option to be set. Then press the 【Enter】 menu on the option bar to confirm setting and exit from the setup interface back to the main screen; press【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to “Mode” option; then use to change and set the mode option. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press key to cancel the modification and return to the main screen.

(1) When other test conditions are the same, the value of attenuation is set as 0dB, the testable optical fiber distance is longest, the signal to noise ratio of trace is relative good, but it may make the OTDR near-end trace saturated so that the near-end trace cannot be observed.

(2) When other test conditions are the same, the value of attenuation is set as 20dB, the testable optical fiber distance is longest, and the signal to noise ratio of trace is poor, but it can achieve smaller test blind zone.

(3) Under the manual test mode (that means real-time test mode and average test mode), the test attenuation should be selected according to the optical fiber to be tested.

(4) When “Track history test” Mode is selected, and the test range is not less than 64km (that means when measuring relative long optical fiber link), the instrument will automatically adjust attenuation setup and display the complete optical fiber link near-end and far-end trace on the display.

Note!

1.2.8 Set Average Times

Only when the test mode is average test, blind area test or auto test, it is allowed to set average times.

Modify and set the OTDR average times through the following description:

Figure 16 Set average times

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

(1) The value range of average test mode is from 1 to 4000. (2) The value range of auto test mode is from 5 to 20.wi

1.2.9 Set IOR

Modify and set the OTDR IOR through the following description:

Figure 17 Set IOR

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

(1) Inaccurate reflective index will result in inaccurate measured optical fiber length.

(2) Reflective index range: 1.00000~2.00000.

1.2.10 Set Helix

Modify and set the OTDR helix through the following description:

Figure 18 Set helix

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

(1) Inaccurate helix will result in inaccurate measured optic cable length.

(2) Helix range: 0.80000~1.00000.

1.2.11 Set Length Unit

Modify and change OTDR length unit through the following description:

Figure 19 Set length unit

  • Touchscreen Operation: Press “Mode” option bar, the active cursor will jump to this option bar; press the button on this option bar to eject a drop-down window with all options, as shown in the above figure. Now press the option to be set. Then press the 【Enter】 menu on the option bar to confirm setting and exit from the setup interface back to the main screen; press【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to “Mode” option; then use to change and set the mode option. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press key to cancel the modification and return to the main screen.

1.2.12 Set Auto Analyse after Sampling

Modify and set the OTDR auto analysis after sampling through the following description:

Figure 20 Set auto analyse after sampling

  • Touchscreen Operation: press any one of wavelength among “Wave” options, the active cursor will jump to this wavelength option; if this wavelength is not be selected, the check box before wavelength will display , after pressing, it indicates the wavelength is selected, the check box before wavelength displays , it indicates to select this wavelength to test; on the contrary, before pressing, this wavelength has been selected, pressing indicates the selection has been cancelled. Then press 【Enter】menu on the menu bar to confirm the setting and exit from the setup interface back to the main screen; press 【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to the wavelength option to be selected; then use to select or cancel selecting this wavelength. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press to cancel the modification and return to the main screen.

After this option is selected, the instrument will analyze the test data after completing the test and give event list.

1.2.13 Set to lock Marker A, B

Modify and set the OTDR lock of cursor A, B through the following description:

Figure 21 Set to lock cursor A, B

  • Touchscreen Operation: press any one of wavelength among “Wave” options, the active cursor will jump to this wavelength option; if this wavelength is not be selected, the check box before wavelength will display , after pressing, it indicates the wavelength is selected, the check box before wavelength displays , it indicates to select this wavelength to test; on the contrary, before pressing, this wavelength has been selected, pressing indicates the selection has been cancelled. Then press 【Enter】menu on the menu bar to confirm the setting and exit from the setup interface back to the main screen; press 【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to the wavelength option to be selected; then use to select or cancel selecting this wavelength. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press to cancel the modification and return to the main screen.

1.2.14 Set On-line Test

Modify and set the OTDR on-line test function through the following description:

Figure 22 Set on-line test

  • Touchscreen Operation: press any one of wavelength among “Wave” options, the active cursor will jump to this wavelength option; if this wavelength is not be selected, the check box before wavelength will display , after pressing, it indicates the wavelength is selected, the check box before wavelength displays , it indicates to select this wavelength to test; on the contrary, before pressing, this wavelength has been selected, pressing indicates the selection has been cancelled. Then press 【Enter】menu on the menu bar to confirm the setting and exit from the setup interface back to the main screen; press 【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to the wavelength option to be selected; then use to select or cancel selecting this wavelength. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press to cancel the modification and return to the main screen.

  1. After this option is selected, distance between cursor A and cursor B will be locked, no matter cursor A or cursor B moves, the other cursor will follow to move to keep the distance of two cursors unchanged.
  2. Only during testing average loss or reflection loss, this option is effective.

1.2.15 Set Entirely Display Trace Test Mode

Modify and set the OTDR on-line test function through the following description:

Figure 23 Set entirely display trace mode

  • Touchscreen Operation: press any one of wavelength among “Wave” options, the active cursor will jump to this wavelength option; if this wavelength is not be selected, the check box before wavelength will display , after pressing, it indicates the wavelength is selected, the check box before wavelength displays , it indicates to select this wavelength to test; on the contrary, before pressing, this wavelength has been selected, pressing indicates the selection has been cancelled. Then press 【Enter】menu on the menu bar to confirm the setting and exit from the setup interface back to the main screen; press 【Return】menu on the menu bar to cancel the setting and exit from the setup interface back to the main screen.
  • Key Operation: use to move active cursor ( ) to the wavelength option to be selected; then use to select or cancel selecting this wavelength. Finally press key to confirm the setting and exit from the setup interface back to the main screen; press to cancel the modification and return to the main screen.

Only when the test range exceeds 64 km, this will be effective.

1.2.16 Set Loss Analyse Threshold

Modify and set OTDR loss analysis threshold through the following description:

Figure 24 Set loss analysis threshold

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

During analyzing trace, if the calculated event point splice loss is bigger than the analysis threshold, this event point will be marked; or it will be neglected automatically.

1.2.17 Set Splice Loss Pass Threshold

Modify and set the OTDR splice loss pass threshold:

Figure 25 Set splice loss pass threshold

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

In the event list, when the calculated splice loss of the event point is bigger than splice loss pass threshold, splice loss value will be marked with *.

1.2.18 Setting Reflection Loss Pass Threshold

Modify and set the OTDR reflection loss pass threshold:

Figure 26 Set reflection loss pass threshold

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

In the event list, when the calculated reflection loss of the event point is bigger than reflection loss pass threshold, reflection loss value will be marked with *.

1.2.19 Set Fiber Breakpoint Threshold

Modify and set the OTDR fiber breakpoint threshold through the following description:

Figure 27 Set fiber breakpoint threshold

  • Touchscreen Operation: press the edit box of “Times” option, the active cursor will jump to this option bar, at the same time pop up value input interface; on this interface, press the small button, the character on the small button will be input into the position of cursor in the edit box, if the small button is not character, pressing will execute corresponding function:
  • : If there is character after the cursor in the character edit box at this time, it will delete the character after the cursor; if there is not character after the cursor, it will delete the character before the cursor.
  • : Move the cursor in the edit box left.
  • : Move the cursor in the edit box right.
  • ~ : The displayed character on the small button to be input into the position of the cursor in the character edit box.
  • : Confirm the input value, exit value input interface and return to the OTDR test condition setup interface.
  • : Cancel modification, exit from the value input interface and return to OTDR test condition setup interface.

Press【Enter】 menu on the menu bar to confirm the setting and exit from the setup interface to the main screen; press【Return】menu on the menu bar to cancel the modification and exit from the setup interface to the main screen.

  • Key Operation: use keys to move active cursor to ( ) “Times” option; then use keys to pop up value input interface; on this interface, select the number button to be input through keys(at this time quick select can be realized through ), press key to input the character on the small button in the edit box or execute the corresponding function; execute button function to confirm the modification of the value and exit from the value input interface to OTDR test condition setup interface; execute button function to cancel the modification of the value and exit from the value input interface to OTDR test condition setup interface; when back to OTDR test condition setup interface, press to confirm the setting and exit from the setup interface to the main screen; press to cancel modification and exit to the main screen.

When the splice loss of event point is bigger than the set optical fiber breakpoint threshold, this event point is optical fiber breakpoint; all events after this event point will be neglected and will not be displayed in the list.

1.3 Test Fiber Link

1.3.1 Auto Test

  • Clean the tested optical fiber end face and connector, make sure the tested optical fiber is reliable and connected into the OTDR test port.
  • Enter OTDR test condition setup interface. (See P27 for the detail of the operation )
  • Use / to move active cursor ( ) to “Mode” option or press “Mode” option directly through touchscreen to select the OTDR test mode: Auto Test.
  • Operate it the same as above, set Times, Wavelength, IOR, Helix and all Threshold.
  • Confirm OTDR Parameter Setting and return to main screen. Press key, the instrument will automatically set test range, pulse width and attenuation, scan optical fiber to be tested and display the trace on the operating interface.
  • After testing optical fiber trace, the instrument will automatically stop scanning and analyze the trace, analyze threshold value according to the setting loss, mark the event point on the trace, at the same time display the event point information on the event table.

(1) The bigger average times is set in the auto test, the longer time testing of trace needs, the signal to noise ratio of testing trace in convenience for the analysis of event point.

1.3.2 Manual Test

  • Clean the end face of the optical fiber to be tested, make sure the optical fiber to be tested is connected into OTDR test port reliably.
  • Enter OTDR test condition setup interface. (See P27 for the detail of the operation )
  • Use / to move active cursor ( ) to “Mode” option or press “Mode” option directly through touchscreen to select the OTDR test mode: Real-Time Test or Average Test or Dead Zone Test.
  • Operate it the same as above, set test Wavelength, Pulse Width, Att. IOR, Helix and all Threshold. When the test mode is average test or dead zone test, the average times should be set.
  • Confirm OTDR parameter setting and return to main screen. Press key, the instrument will scan optical fiber to be tested according to the set test mode and test parameter and display the trace on the operating interface.
  • Press key to stop sweep test at any time. If the test mode is average test or dead zone test, the average times displayed in the trace displayer area is equal to the set average times, the instrument will automatically stop testing.
  • Press【Analyse】menu item on the main menu bar, the instrument will automatically analyze the trace and give event table according to the set event threshold. If it is set “Auto analyse after sampling”, when stopping test, the instrument will automatically analyze the trace.
  • It can also set the proper mark point position through setting test item, check the distance and loss information of the optical fiber to be tested on the trace and result display area.

(1) Under the real-time test mode, the instrument will make real-time scan for the change of the optical fiber to be test, but not make average handling for it.

(2) Under average test mode, after the instrument scanning tests the trace of optical fiber to be tested, make average superposition treatment to the trace continuously according to the set average times.

(3) Average test mode can achieve trace of higher signal to noise ratio. Under the same condition, the noise content in the trace received from average test is lower than that of real-time test, and the test result is more precise.

1.4 Analyzing Waveform Trace and Checking Event Table

Under the mode of “Auto Test”, after testing, it will conduct a trace analysis automatically and list the event information in the event table.

Under the modes of “Real Time Test”, “Average Test” and “Dead Zone Test”, after stopping the test, press 【Analyse】 in the main menu bar and it will conduct a trace analysis. If “Auto analysis after sampling” is set, after stopping test, the instrument will conduct a trace analysis about the trace. After the trace analysis is finished and the event point is found, it will display the event information in the event table of the main screen in accordance with the every set event threshold; and at the same time, it will mark the location of the event point in the test trace and display the submenu bar of the event table.

1.4.1 Event Table in Main Screen

The event table in the main screen is shown as follows (in Figure 28). Here press key and you can check information of all events in the event table one by one.

Figure 28 Event list window

1.4.2 Sub-window of Event List

After the trace analysis is done, you can check the content of the whole event table in the sub-window of the event list. (If after the trace analysis is done and no event point has been found then the event list will be blank.)

  • Touch screen operation: Press the menu item of 【Event Table】 in the main menu bar and the display window for test conditions in the main screen will be hidden. And at the same place, there will be a popup sub-window of the event table, as shown in Figure 8-28. All the event points’ information will be displayed in list in this window.
  • Operation of pressing the key: Press and the active cursor will be shifted into the main menu bar. Press and it will shift the active cursor to the menu item of 【Event Table】; then press and the display window for test conditions in the main screen will be hidden. And at the same place, there will be a popup sub-window of the event table, as shown in Figure 8-28. All the event points information will be displayed in list in this window.
  • Press to move the cursor upward and downward to select different event points; or directly press the item in the event list and the cursor bar will select the pressed item; or press the menu item of or in the menu bar and move the cursor bar upward or downward to select different event points.
  • Drag the move bar at the right of the event list and turn the page quickly forward or backward to display the content of the event list.

1.4.3 Add Event Points

Press the menu item of【Add】 in the submenu bar of the event table and it will display the operating interface of adding event points, as shown in the following Figure 29.

Figure 29 Operation interface of adding event points

  • Press to change the type of the event point, or press the drop-down list option of the event point type on the touchscreen and select the type of the event point.
  • Move the cursor to a location of a new event point.
  • Press【Enter】 and it will add an event point at the place where the cursor locates in the event table and then it will go back to the event list interface. However, if after calculation and analysis, the splice loss of the new added event point is smaller than the set loss analysis threshold, or the location of the event point is wrong, the instrument will automatically give up the new added event point.
  • Press 【Cancel】 and it will cancel the current operation and return to the event list interface.
  • Under this status, the cursor lock will be relieved automatically.

1.4.4 Delete Event Points

Press the menu item of【Delete】 in the submenu bar of the event list and it will delete the

event point selected by the current cursor bar in the event list.

1.4.5 Adjust Event Points

Press the menu item of 【Adjust】 in the submenu bar of the event list and it will display the operating interface of adjusting the added event points. Press to change the type of the event point, or press the drop-down list option of the event point type on the touchscreen and select the type of the event point.

  • Move the cursor to a location of a new event point.
  • Press【Enter】 and it will add a event point at the place where the cursor locates in the event table and then it will go back to the event list interface. However, if after calculation and analysis, the splice loss of the new added event point is smaller than the set loss analysis threshold, or the location of the event point is wrong, the instrument will automatically give up the new added event point.
  • Press 【Cancel】 and it will cancel the current operation and return to the event list interface.
  • Under this status, the cursor lock will be relieved automatically.

1.4.6 Set Threshold

Press the menu item of 【Threshold】 in the sub menu bar of event table and it will directly enter the setup interface of OTDR parameters. In this interface the event analysis threshold can be set.

  1. Measure Fiber Length and Loss

Besides pressing the 【Analyse】 button or setting “ Auto analysis after sampling” to realize analyzing the length and loss information of the event point in the test trace automatically, you can also observe and analyze the length, loss, etc information of the tested fiber by the method of manually setting the mark point.

2.1 Measure Fiber Length

To measure the length of any event point (or fiber end), the operation steps are as follows:

  • Move the current active cursor around the event point (or reflection peak of the end of the fiber).
  • Zoom the waveform trace to the maximum both in the horizontal and vertical direction.
  • Well adjust the location of the active cursor and move it to the event point (or the take-off point of the reflection peak of the fiber end).
  • The length of the mark point where the active cursor locates displayed on the screen is the distance between the event point (or the fiber end) and OTDR output terminal.

Figure 31 Fiber length test

3.2 Measure Fiber Average Loss

To test the average loss of some section of the fiber, the operation steps are as follows:

  • Set the test item as average loss test. At this moment there will be two cursors in the main screen which are cursor A and cursor B.
  • Move Cursor A and B to any two points in the linear zone of the tested fiber section. (In order to ensure the accuracy of the test result, when test relatively long fiber, please set that the distance between the two mark points should be at least greater than 500 m.)
  • At this moment the average loss value displayed on the operating window is the average loss of the fiber section which was to be tested.

Figure 32 Average loss test

Loss (A-B):0.600 dB: the loss between cursor A and B

Average loss: 0.145 dB/km: the average loss of the fiber section where cursor A and B locate.

Distance (A-B): 3.71491 km: the distance between cursor A and B

3.3 Measure Splice Loss

To measure the splice loss, the operation steps are as follows:

  • Set the test item as splice loss test. At this time there will be 4 cursors in the main screen (they are cursor a, cursor A, cursor B and cursor b in turn).
  • Expand the wave form in the horizontal direction and locate the cursor A at the end of the fiber linear zone which is ahead of the tested connection point.
  • Locate the small cursor (namely cursor a) which is ahead of the cursor A at the initial end of fiber linear zone which is ahead of the tested connection point.
  • Locate the cursor B at the end of the fiber linear zone which is ahead of the tested connection point.
  • Locate the small cursor (namely cursor b) which is after the cursor B at the end of fiber linear zone which is after the tested connection point.

Figure 33 Splice loss test

Average loss (a-A): 0.196 dB/km:The average loss of the fiber section of cursor a and A

(B-b): 0.175 dB/km: The average loss of the fiber section of cursor A and b

Splice loss: 0.343 dB: The splice loss of the connection point of cursor A

3.4 Measure Reflection Loss

To test the reflection loss of a certain connection point, the operation steps are as follows:

  • Set the test item as splice loss test. At this moment there will be two cursors in the main screen which are cursor A and cursor B.
  • Expand the wave form in the horizontal direction and set the mark point A at the end of the linear zone which is ahead of the tested reflection point.
  • Locate the mark point B at the top of the reflection event point, as shown in Figure 34.
  • At this moment the reflection loss value displayed on the operating window is the reflection loss of the tested reflection point.

Figure 34 Reflection loss test

Distance (A-B): 0.03440 km: The distance between cursor A and cursor B

Reflection loss: 42.472 dB: The reflection loss of reflection peak of cursor A and cursor B

Copy the Files between OTDR and USB Disk/SD Card

Under the submenu bar of the file operation, press the menu item 【Transfer】 and it will display the operating window of transferring file on the screen as shown in Figure 35.

Figure 35 Operating window of file transfer

The source disk in the file copy:

It is the current active window and there is “ ” before disk name, at the same time there will appear a cursor bar in the file list in the window and you can mark “*” on the file selected by the cursor bar. As shown in the figure above, you can select memory or USB disk/SD card as the source disk for copy by pressing the file list window on the touchscreen or by pressing .

The target disk in the file copy:

There is no mark before disk name and there is no cursor bar in the window either, as shown in the figure above.

The operation steps are as follows:

  • Press to select the file by moving the cursor bar upward or downward in the current active window.
  • Press and it will add or cancel the mark “*” in front of the file selected by the current cursor bar.
  • Press and it will switch current active window between memory and USB disk/SD card.
  • Press 【Copy】 and it will copy the file. The files with “*” in the source disk will be copied to the target disk.
  • Press 【Mark】and it will add or cancel the mark “*” in front of the file selected by the current cursor bar.
  • Press【Mark-All】 and it will add or cancel the mark “*” in front of all the files in the current active window.
  • Press the menu item of 【USB disk/SD】 and it will switch and display the files in the USB disk and SD card in the file lists above. The user can transfer the files in the memory to the USB disk or SD card.
  • Press 【Delete】 and it will delete the files marked with “*” in the current active window.
  • Press 【Content】 and if at this time the cursor bar locates at the name of the content, it will enter this content.
  • Press【Return】 or press and it will exit from the transfer window and go back to the main screen of OTDR.

Set Fiber Information

Under the main menu bar of the main screen, press【Setup】to enter the submenu item of setting. In this sub-menu item, press【Parameter】to enter the operating window of OTDR

parameter setup. Press 【Cable】 and it will display the operating window of fiber information setup, as shown in Figure 36.

Figure 36 Window of cable information setup

  • Press to move the active cursor (red small button) to every setup item.
  • When the active cursor locates at the fiber type and data status, press to change the setup of this item; when the active cursor locates at other setup items, press to display the input window as shown in Figure 37.

Figure 37 Input window of fiber information

  • Press to select the small buttons circularly by moving the active cursor to the left or right.
  • Press to quickly move the active cursor to select the small buttons.
  • Press to input the characters on the small buttons selected currently to the location where the cursor locates in the edit box, or conduct the functions of the buttons.
  • You can also complete character input and conduct the functions of the Figure 8-40 Window of cable information setup Edit box buttons by pressing each buttons on the touchscreen.
  • : Move the cursor in the edit box to the left.
  • : Move the cursor in the edit box to the right.
  • : If there is any characters behind the cursor in the edit box at this moment, press this button and it will delete the characters behind the cursor one by one and then delete the characters ahead of the cursor.
  • : Confirm entering and go back to the setup interface of the fiber information. At this time the new input content will replace the content in the former operation items.
  • : Give up the current input and go back to the setup interface of the fiber information. At this time the content in the former operation items remains the same.
  • Press the menu item of 【Enter】 and it will confirm the current information setup and go back to the main screen of OTDR.
  • Press the menu item of 【Return】 and it will give up the current modification and keep the former set content and go back to the main screen of OTDR.

When save the file in the format of .sor, the fiber information will be saved into the files.

Set Reference Origin

Press 【Setup】 menu in the first menu bar of main screen into the Setup Sub-Menu. Here, press 【Reference Point】, and prompt window appears, prompting user to set the reference origin, as shown in Figure 38.

Figure 38 Prompt Message for Setting Reference Point

  • Press 【Enter】 button in prompting message box or press to set the position of currently active cursor as reference origin, and close the prompting message box meanwhile.
  • Press 【Cancel】button in prompting message box or press to cancel current operation, and close the prompting message box meanwhile.

Print Test Report

  • The instrument only supports printers which support PCL language format. If instrument is connected with printers not supporting PCL language format, it will not be able to print.
  • User may copy waveform files to PC and use simulation analysis software to print the test report. Connect printer to USB port of instrument. Peruse the notices abovementioned before use.
  • Press 【File】in the first menu bar of main screen into file sub-menu, and then press 【Print】 into the print setting window.
  • Press to move active cursor (the red small button) to select different operating items.
  • Press to modify content of the selected operating items.
  • After selecting printer type and printing content, press 【Enter】 or press to print test report.
  • Press 【Cancel】 or press to cancel operation and return main screen.

If printing operation fails, it may be due to one of the   following:

  • Instrument does not support printer of this type. Please replace with printers of other types (printers connected to instrument must support PCL language) and try again. It is suggested to copy the waveform files to PC and use the stimulation analysis software to print the test report.
  • Defects in connecting cable of printer.

Please replace the printing cable and retry printing operation.

  • Incorrect setting of printer

Please check if the indicator light of printer is indicating error; retry printing operation after removing error.

Typical Application in Pictorial way:

Advanced OTDR is mainly used to measure FTTx network, it provides multifunction in one unit offers three measuring modes: manual mode (including real time mode and average mode), auto mode and dead zone mode.

  • Manual measurement mode: manual mode is suitable for skilled operator who is familiar with the instrument. In this measurement mode, to get more accurate results, real-time mode or average mode can be selected if necessary.
    • In real-time mode, the dynamic changes of fiber chain can be detected timely, it is very useful when you need to observe the effect and process of fiber being spliced or connected.
    • In average measurement mode, the noise in trace can be suppressed, and the SNR (signal noise ratio) is improved, therefore the result is more accurate. In fact, the more average times are executed, the more noise in trace is suppressed, and the longer time is spent for signal processing. In practice, the average times should be set properly according to necessity.
  • Auto measurement mode: the optimized measurement conditions are set automatically, it’s unnecessary to operator to know about the complicated background knowledge and the further details of operating. In this mode, the more accurate results can be gained when proper average times are set, but it will increase the time of signal processing.

Dead zone mode: this mode is suitable for testing optical fiber with short distance and the optimized settings of distance range, pulse width and attenuator can be executed automatically. To get the best result, the terminal return loss should be guaranteed less than -40dB.

Standard Accessories

NO. Name
1 Power line
2 AC/DC adapter
3 Quality certification
4 User manual
5 Trace analysing software(CD)
6 Hard Carrying case(including Gallus)
7 Special Gallus of instrument