GAOTek Optical Power Meter With Audio & Video Test

The Optical Power Meter with Audio &

Video Test is able to simultaneously test and estimate the signals of voice, data, and video and is used primarily as a tool for

maintenance of PON projects.



The GAOTek Optical Power Meter with Audio & Video Test is able to simultaneously test and estimate the signals of voice, data, and video. It is primarily used as a tool for construction and maintenance of PON projects and it targets at FTTx application and maintenance. This device can be measured and displayed on BPON, EPON and GPON. Additionally, it provides simultaneous measurement for all three wavelengths on the fiber (1490 nm, 1550 nm and 1310 nm).

Key Features

  • Estimates the signals of the voice, data and video
  • Provides simultaneous measurement for all three wavelengths on the fiber (1490 nm, 1550 nm, 1310 nm)
  • Can experiment at voice, data and video signal synchronous measurement and display on BPON/EPON/GPON.
  • Used in burst mode measurement of 1310 nm upstream.
  • With visual fault locator module
  • Optical power meter and VFL with one port
  • Offers up to 10 different threshold sets in total
  • Three status LEDs represent different optical signal conditions of Pass, Warn and Fail respectively.
  • 10 minutes Auto-off function can be activated or deactivated
  • Good key design, high sensitivity, greatly reducing the volume and weight of the tester.
  • FC/SC/ST Interchangeable/2.5 universal adapter
  • Uses the software to connect with PC, setting the threshold, data transfer, and calibration of the wavelength.
  • USB communication port enables data transfer to a PC.
  • Power supply 1.5 V battery
  • 1000 measurement items can be saved in PON power meter or computer for data review.

Technical Specifications

PON Module PON Power Meter GAO-OPM-117-A GAO-OPM-117-AV GAO-OPM-117-AP
1310 nm Upstream Measurement
Pass Zone 1260 nm – 1360 nm
Measurement Range -40 dBm – 10 dBm
Output power(max) 15 dBm
Isolation@1490/1550(dB) >40 dB
Burst mode measurement error <±0.5 dB
1490 nm Downstream Measurement
Pass Zone 1470 nm – 1505 nm
Measurement Range -40 dBm – 10 dBm
Output power(max) 15 dBm
Isolation@1310/1550(dB) >40 dB
1550 nm Downstream Measurement
Pass Zone(nm) 1535 nm – 1570 nm
Measurement Range -40 dBm to 10 dBm
Output power(max) 25 dBm
Isolation @1310 /1550(dB) >40 dB


Measurement accuracy
Connatural uncertainty (dB) ±0.5 dB
Linearity(dB) ±0.1 dB
Passing through insertion Loss(dB) <1.5 dB


General Information
Detector Type InGaAs


Optical Connector FC/SC/ST interchangeable/2.5 universal adapter
Fiber Type SM 9 um/125 um
Measurement Unit dB/dBm/xW
Resolution (dB) 0.01 dB
Operation Voltage DC 3.3 V – 5.5 V
Power Supply 3 pc 1.5 V battery
Continuous Operation time (h) PON: 90 h PON:

90 h


100 h

VFL:50 h


90 h


50 h


90 h


100 h

Operation Temperature 14 °F – 140 °F (-10 °C – 60 °C)
Storage Temperature -13 °F – 158 °F (-25 °C – 70 °C)
Weight 0.93 lbs (423 g) 0.94 lbs (425 g) 0.93 lbs (424 g) 0.93 lbs (424 g)

Normal Optical Power Meter Module:

Normal Optical Power Meter PON Power Meter GAO-OPM-117-A  GAO-OPM-117-AP
Measurement Accuracy
Connatural uncertainty None


±0.5 dB
Linearity ±0.1 dB
Passing through insertion Loss -70 dBm – 6 dBm
General Information
Measurement Unit None dB/dBm
Resolution 0.01 dB
Calibration Wavelength 1300 nm/1310 nm/ 1490 nm/1550 nm/ 1625 nm 850 nm/1300 nm/ 1310 nm/1490 nm/ 1550 nm/ 1625 nm
Detector Type InGaAs
Optical Connector FC/SC/ST Interchangeable/2.5 universal adapter

 VFL Module:

VFL PON Power Meter GAO-OPM-117-A GAO-OPM-117-AV
Output power None >0.5 mW
Wavelength 650 nm
Optical Connector FC/SC/ST Interchangeable/2.5 universal adapter
Fiber Type SM/MM


Additional Information


1- OLT/VIDEO:1490 nm/1550 nm down stream

2- ONT:1310 nm Up Stream Port (1310 nm)

3- VFL or OPM Port

4- Display

5- ONT 1310 nm Up Stream Port LEDs

6- OLT 1490 nm/1550 nm Down Stream LEDs

7- Video signal LEDs (1550 nm)

8- AUTO Power/Off key

9- UP In the first interface, switch visual fault location model (VFL)

10- ENTER: Confirmation the function selection and saving the data.

11- MENU: PON/CW Power meter module Option

12- DOWN: In the first interface, Switch between VFL in continuous light (CW) & pulse light (HZ)

13- CANCEL: Function cancel


PON Online Test Connection Diagram

ONT The sensitivity test configuration diagram

Data Communication

Run the CD and install the EXE and USB driver softwareCP210x_VCP_Win2K_XP_S2K3.exe.

Connect the instrument to the computer’s port using the provided USB cable.

Open the software.

Upload the data

  1. Open the instrument, first of all click    to connect the instrument to the computer (Click   “English” to set the language of the operation interface to be English)
  2. Choose “Upload Data”, click “Upload history data” sign, the saved data can be read on the computer, and saved as a file format.
  3. Click the button “Del Cur” or  “Del All” to delete the data.

Threshold Setting

From the toolbar, select “Threshold Setting”, and click  “Threshold Setting” icon to type or modify the threshold value.

Click  “Upload threshold value” icon to read the threshold set. For the used testing threshold values will be displayed as blue front, for the non-used threshold values will be displayed.

Click  “Del Cur” or “Del All” to delete the values.

Choose “Calibration” tab, the user can perform user self-calibration operation. Also “Factory Default” mode can be chosen. For example, the current optical power at 1310 nm is -10 dBm, type -10 dBm in the text box of input standard power and click the Calibration tab. Then finish the calibration operation at 1310 nm wavelength.

Power ON/OFF

  1. Power ON

Press   for about one second to make the unit power on,Enter into the PON power meter function , the unit displays as shown in below figure:

As shown in above figure, the LCD will display simultaneously three wavelengths of 1310 nm upstream measurement and 1490 nm, 1550 nm downstream measurements. When optical signal is present under test, the optical channel will display power levels in dBm, when optical signal is not available, then the optical channel will display “LOW”. “” indicates 10 minutes auto-off function is activated. The unit will turn itself off after 10 minutes of idle time. Press to close 10 minutes auto-off.

  1. Power OFF

Press  key for about one second,to turn off the unit.

PON Power Meter module

PON power meter can simultaneously measure the PON network upstream signals of 1310 nm, 1490 nm downstream data signal and descending video signal output power of 1550 nm

After opening the instrument, Press    to enter into menu operation and Press “” to exit. Press “” or “” to choose the following settings, and press “” to choose the function.

Use“ or ” to choose the required threshold value (The thresholds range and name have already been set in the software and also downloaded to the instrument. For example choose threshold and name it as test1 and press “”.

Press “” to return back to the testing menu.

Clean the tested optic cable, connect with OLT/VIDEO port and ONT port (SC type connector), noted with the optic adaptor type, the optical adaptor will break and the tested value will be faulty if the un-matched adaptor connected

Pay attention to the type of the measured optical fiber connectors. If it does not match the type of access instrument, the instrument output optical fiber connector may get damaged and the true result cannot be obtained.

1310 nm upstream, 1490 nm, 1550 nm downstream, and 3 wavelength measurement at the same time.

Eg.: The selected threshold name is “test1”(+3 dBm,-20 dBm,-30 dBm). The measured result displayed: -10 dBm (Optical power) at 1310 nm upstream measurements as shown in above figure, as it is within +3 dBm (Pass threshold)~-20 dBm (Warning threshold), therefore, it means the optical signal in Pass status and the LED at 1310 nm will light up with green color: If the measured result is between -20~-30 dBm, it means the optical signal in Warn status and the LED at 1310 nm will light up with yellow color which means the optical signal may have problems but still can be used; If the measured result is out of the range of thresholds, i.e greater than +3 dBm or smaller than -30 dBm, then it means the optical signal has problems but the LED at 1310nm will light up with red color. The same process can be used at 1490 nm and 1550nm wavelengths.

Press“”, then save will be displayed on the screen. The data recording series no. is 002. Press “” for saving, and “” for cancel, and the saved recording can be checked in the “data view” under “historical data” Menu.

After finishing the testing work, in order to keep the connect port clean, cover the dusty-cap.

Instructions for Normal Optical Power Meter Function

Press  button to open the instrument, use “” button and ; to choose the Optical Power Meter measurement, then press “” to enter into the selected function. or Button in this case, is to choose the wavelength. Instrument provides the testing of 850 nm, 1300 nm, 1310 nm, 1490 nm, 1550 nm, 1625 nm, display “-70 dBm” when used without light.

Take 1310nm measurement for example:

Connect with the tested optic fiber

Clean the optic fiber end-face, and connect with the PIN port on the instrument (SC/ FC/ST adaptor), noted that with this type of the optic fiber adaptor, the non-matched connection will damage the connector on the instrument and also cause an incorrect measuring result.

E.g.: 1310 nm measurement, after connecting it with the optic fiber, it will display -20 dBm. Press “”, set -20 dBm as the reference value, and it will also display relative value (dB), see as following:

In order to get the loss between the two measurements, do another time testing under the first relative output power. The relative value will be calculated automatically. For example, the second time testing of 1310 nm output power is -35 dBm, the relative output power will be -15 dBm (relative output power=absolute output power-reference value -15 dBm = -35.00 dBm – (-20.00 dBm) see as following:

After testing is over, cover the dust cap to keep the optical connector port to be clean.

VFL Module

During the event or break point checking of the short distance optic fiber and pigtails we can use the VFL function.

First of all, clean the optic fiber end-face, and connect it to the VFL port (FC adaptor). After opening the instrument, press “” to activate this function, then we can see the visual laser at the breaking point or the end of the pigtails. Press “” to shift the CW and the Hz wavelength and press  again to close this function.

Other function instruction

PON Power Meter:

Relative output power measurement:

As per requirements of measurement to select the different wavelengths and Ref settings, relative power = testing value-Ref value. Press or to select the different wavelengths, Press“” to change the Ref value as shown in below figure

Threshold Selection

It offers up to 10 different threshold sets in total. There are three status LEDs in the front panel and each light indicator has three conditions of colors which represent different signal status as below:

Green: represents Pass

Yellow: represents Warning

Red: represents Fail

“ThreshSel” displays selected threshold setting order number from 1 – 10, and “Name” displays selected threshold name. Press orto select the corresponding thresholds. With using PON power meter.exe software to modify the values range and names of thresholds.

Status LEDs

Switches of Measurement Units

Measure the output power of the fiber use dBm or Xw. Press “” with andto choose the measurement units, press “” to exit and cancel the current operation as shown in below figure.

Switches of language

There are two languages English and Chinese to choose. Press “andto select “Language” option, Press “” to exit and cancel the current operation.

Time setting

Press andselect the “Time Set” option and press  to change year-month-date-time respectively as shown in below figure. Use andto change the digits. After setting, press “” to confirm. Press “” to exit and cancel the current operation.

This option is designed to review and delete saved measurements data.

Press “Menu” to enter into menu operation, using andto highlight “History Data” option. There are three options in History data:

  • “Data View”

Under “History data”, use andto highlight “Data View”, press “” to confirm and view the history data as shown in below figure. Press “” to exit.

As shown in above figure, when there is no optical signal to be tested, the power level will show -40 dBm at 1310 nm & 1550 nm and -50 dBm at 1550 nm, when the optical signal is present, the unit will display the corresponding tested value. “Thresh Sel 5” is the name of current selected threshold set.  0001 here represents the current viewed data, 0002 here means the total quantity of saved data measurements. Use andto choose or change the different saved history data. If no measurements are saved in the unit, it will display “No Record”

  • “Del Cur”

Under “History data”, use andto highlight “Del Cur”, press “” to confirm and to delete the current data as shown in below figure.

  • “Del All”

Under “History data”, use   andto highlight “Del All”, press “” to confirm and to delete all the saved history data as shown in below figure.


Problem Possible Cause Solution
No display on the LCD 1.     Power Off

1.     Low Battery

1.     Press“” to turn on

2.     Change the battery

Inaccurate measurements 1.Optical interface is not clean

2. Improper fiber connection

1. Clean the fiber optic interface

2. Reconnect the fiber


To help ensure long, trouble-free operation:

  • Always keep the fiber-optic connectors clean before using, keep the unit free from oil and dust.
  • Do not use unclean, non-standard fiber-optic connector adapter.
  • Do not insert into bad fiber-optic connector interface which may cause the system to stop working.
  • Try to use one type of fiber optic connector adapter.
  • After completing the testing or when the unit is unused, please cover the dust-proof cap to ensure the optical interface is clean and to avoid measurement errors caused by dust.
  • Push/pull the fiber-optic connectors carefully to avoid scratches on the interface.
  • Clean optical connectors regularly with cleaning cotton swabs.

Standard Configuration

Items Title Quantity
1 Tester 1unit
2 User Manual 1pc
3 USB 1pc
4 Soft CD 1pc
5 1.5 V AA Battery 3pc