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A0050008

GAOTek PCM Channel Analyzer

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Product Description

Overview

GAOTek PCM Channel Analyzer is an advanced portable test set developed based on multi-task operation system. It is widely used to measure PCM devices, digital switches, carrier wave communication devices, VoIP devices, etc. It is especially useful in the measurement & test during the process of R&D, production, engineering installation, commissioning, verification and maintenance.

Features

  • A-A Voice channel Characteristics testing:
    • Level
    • Variation of gain with frequency
    • Variation of gain with input level
    • Total distortion including quantizing distortion
    • Idle channel noise
    • Crosstalk
    • Return loss
    • Longitudinal conversion loss
    • Longitudinal conversion transfer loss
  • A-D, D-A, D-D Voice channel Characteristics testing
  • 2M (E1) frame and unframed BER testing, alarm detection and error analysis
  • Test interfaces: 2/4 W E&M, MDR, LGE, FXO, LGS, FXS
  • Built-in masks for test comparison
  • Work with PC software TestManagerPro, to upload results to PC
  • Upgrade software for free

Technical Specifications

Items Descriptions
Generator/Receiver frequency:200 Hz ~ 3600 Hz

level:+5 dBm0 ~ -60 dBm0

Interface Impedance 600 W, 200 W + 560 W//0.1 uF, 200 W + 680 W//0.1 uF, 0 Ω (output) and high impedance (input)
Relative Level Tx:+1 dBr ~ -16 dBr, step: 0.1 dBm

Rx:+7 dBr ~ -10 dBr, step: 0.1 dBm

DC Loop ICT: Dynamic impedance > 100 KΩ, Loop Current: max. 60 mA, Loop Voltage: 18 V;

OGT: Dynamic impedance  > 100 KΩ, Loop Constant Current = 25 mA

E1 Testing Impedance:75 Ω (Unbalanced), 120 Ω (Balanced)

Line Code:HDB3,AMI

Frame Type: PCM 30/30CRC, PCM 31/31 CRC, Unframed

Dimension 11.5 in × 7.6 in × 2.2 in (293 mm × 195 mm × 56 mm)
Operating Temperature 32 F ~ 122 F (0 ℃ ~ 50 ℃)
Storage Temperature -22 F ~ 158 F (-30 ℃ ~ 70 ℃)
Humidity 5 % ~ 95 % Non-condensing
Weight 5.5 lbs (2.5 Kg)

Additional Information

  1. Product Compositions

PCM Channel Analyzer consists of following modules:

  • Hardware: Main board and display board
  • Software: Embedded software and PC software–TestManagerPro
  • Accessories: Waterproof package, test cables, AC power cord, etc.

1.1 Compositions of the Instrument

  • Face panel: LCD display, LED alarm and status indicators, and operational keys
  • Back panel: Four holders, and serial number label
  • Front panel: E1 unbalanced signal input/output port (L9 coaxial), E1 balanced signal input/output port, analog balanced receive/transmit port, analog unbalanced receive/transmit port, 220 V AC input jack, fan, and grounding pole
  • Rear panel: power switch, network port, master-slave USB port, and stylus jack

1.2 Appearance of the Instrument

Figure 1 shows the appearance of the instrument.


Figure 1: Appearance of the Instrument

  1. Operational Keys

PCM Channel Analyzer has 22 operational keys on the keyboard, i.e., Back, Main MenuUp, Down, Left, Right, Enter, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, 0, #, Backspace and +/-. As the operational keys are accessorial part for inputting, please try to use the touch screen as much as possible. Figure 2 shows these operational keys.

Figure 2:  Arrangement and Names of Operational Keys

  1. Touch Screen

The touch screen is a man-machine interactive interface device that works together with the electronic display. It can be operated easily and visually. The operator can directly click the touch screen to send a command and set a function at will. In comparison with the traditional keyboard and mouse input mode, input via the touch screen is more visual.

When the operator clicks the transparent touch screen using the stylus, the conducting layer of the upper line and lower line forms a contact controller to receive the information of this contact point, send the signal to the related IC control part, and also send it to the host via the interface.

The plastic stylus is designed with a round and smooth pen point, which will not scratch the screen, and can generate the induction effect under proper pressure.

This four-wire resistance touch screen shows the advantages of high definition, good transparency, high resolution, and high-speed transmission reaction.

The surface undergoes rigidity treatment to reduce scratches, as well as chemical conversion treatment, polished surface and matt surface treatments. The touch screen is highly stable. Once calibrated, it will never drift.

  1. LED Indicators

PCM Channel Analyzer has 16 indicators, of which 12 are status indicators and 4 are alarm ones. They indicate the current operating status of the instrument and if any alarm is detected during the test process. The arrangement of the status and alarm LED indicators is shown in Figure 3.

Figure 3:    LED Status and Alarm Indicators

The LED status and alarm indicators reflect the current testing status in real time. With the indication of LED, we can make a judgment of the testing status intuitively. And this will help the operator in understanding and resolving the problems during a test.

The LED status and alarm indicators are described in Table 4.

Table 4: Description of Status and Alarm LED Indicators

  1. LCD Icon Indications

The functions of menus on the main menu of PCM Channel Analyzer are described in Table 5 and Figure 4.

Table 5:   LCD Icon Indications

Figure 4:    Main Menu of LCD Icons

  1. Getting Started

7.2 Power Supply

This instrument is powered by the external power supply. Connect the input end of the dedicated AC power cord to the 220 V/50 Hz AC power supply, and the output end to the AC power port of the instrument.

7.3 Switch-On

7.3.1 Switch-on Inspection Steps

  • Connect the AC power cord. This instrument can be switched on after the “ON” end of “Power” switch has been pressed. The “Power” indicator of this instrument turns on.
  • This instrument first displays the instrument name, and then automatically loads the programs and configurations, the whole process of which takes about 20 seconds.
  • The power of the instrument can be turned off by pressing the “OFF” end of “Power” switch.

7.3.2 Setting the Time and Date

On the top line of the screen, LCD displays the current time and date, in the format of “Year-Month-Date Hour: Minute: Second”, with 24-hour system. Since the test result is time-stamped, it is necessary to set the correct time and date before using the instrument.

Time and date can be set in “Time & Date” in the “Others” menu, by the operational steps as follows:

  • Press the “Other” key to switch to the “Others” menu, and set the time and date.
  • After the settings, click OK to run the clock.

7.4 Communication with PC

This instrument supports communication with PC via the network interface (Ethernet port) or USB interface by TestManagerPro software. TestManagerPro can do three jobs: the first one is to upload the test results stored in the instrument to PC for further processing including filing, printing and analyzing; the second one is to write the user-defined mask and test sequence point in the instrument via PC; the third one is to upgrade the embedded software inside the instrument via PC to protect your investment.

7.4.1 Steps of Communication with PC

  • Connect the USB port of the PC to the instrument with a communication USB cable, or connect the instrument to Ethernet via a network cable.Switch on the instrument.Set the communication port state ON in “PC Communication” of “Others” menu.
  • Run the TestManagerPro software on PC, click the “Select” button to choose the instrument type and then click the “Connect” button. After the successful connection, the user can upload, view, analyze, delete, print test results in the form of report, write self-defined masks and test sequence points, and do other operations. For detailed operations, see the instruments for TestManagerPro in Chapter 6.

7.4.2 Upgrading the Embedded Software

Supplier will launch the latest version embedded software and host software TestManagerPro in the website of our company for the users to download. Make sure to visit our website frequently to ensure you will always get the software of the latest version. For the software upgrading method, please refer to the relevant part of “Communication with PC” and follow instructions of the TestManagerPro.

7.5 Calibration and Use of the Touch Screen

This instrument supports the touch screen input mode. When the location that responds in the operation of the touch screen is incorrect, you need to calibrate the touch screen. Go to “MISCELLANEOUS” in the “Others” menu, and click “Enter” on the right of touch screen calibration to go to the touch screen calibration window, as shown in Figure 5.

  • Step 1

Touch the center of “+” at the screen center with appropriate strength by using the stylus. The “+” symbol will move to the upper left corner when the operation takes effect. If it doesn’t move to the upper left corner, touch the center again, as shown in Figure 6.

  • Step 2

Touch “+” again and the “+” symbol will move to the lower left corner when the operation takes effect, as shown in Figure 7.

  • Step 3

Touch “+” again and the “+” symbol will move to the lower right corner when the operation takes effect, as shown in Figure 8.

Figure 5:    Touch Screen Calibration (a)

Figure 6:    Touch Screen Calibration (b)

Figure 7:    Touch Screen Calibration (c)

Figure 8:    Touch Screen Calibration (d)

  • Step 4

Touch “+” again and the “+” symbol will move to the upper right corner when the operation takes effect, as shown in Figure 9.

Figure 9:    Touch Screen Calibration (e)

  • Step 5

Touch “+” again and the “+” symbol will disappear when the operation takes effect. The interface will appear the following instructions indicating the calibration is ok, as shown in Figure 10.

Figure 10:    Touch Screen Calibration (f)

  • Step 6

Click any location on the touch screen, the calibration takes effect. At the same time you will exit from this calibration window after this operation works.

7.6 Safety Precautions

The following general safety precautions must be observed during all phases of operation, package, transportation and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual will lead to the destruction of the instrument or other devices. The manufacturing company assumes no responsibility for the consequences as caused by the customers’ failure to comply with these requirements.

7.6.1 External Power Requirements

Please use the supplied AC power cable when operating with the instrument. Major power parameters: AC 200 V ~ 240 V, 50 Hz, Max 0.5 A.

7.6.2 Operating Environment

PCM Channel Analyzer is designed for indoor use only, and may be operated in environments within the following limits:

Temperature: 32 oF ~ 122 oF (0 oC ~ +50 oC)

Altitude: Up to 3050 m (10,000 feet)

Humidity: 5% ~ 95%, non-condensation

7.6.3 Operation Requirements

All test interfaces are located at the top of the instrument. Before connecting, please pay attention to the Warning and Caution information provided. The instrument contains components sensitive to electrostatic discharge. To prevent component damage, carefully follow the handling precautions presented as below.

The smallest static voltage most people can feel is about 3500 volts. It takes less than one tenth of that (about 300 volts) to destroy or severely damage static sensitive circuits. Often, static damage does not immediately cause a malfunction but significantly reduce the component’s life. Adhering to the following precautions will reduce the risk of static discharge damage.

  • Before operating the instrument, select the working area where potential static sources are minimized. Avoid working in carpeted areas and non-conductive chairs. Keep body movement to a minimum. We recommend that you use a workstation with static control.
  • Handhold the instrument by touching its cover. Avoid touching any components or edge connectors. Ground the grounding pole.

7.6.4 Storage and Shipment Requirements

PCM Channel Analyzer may be stored or shipped in environments within the following limits:

Temperature: -22 F ~ 158 F (-30oC ~ +70oC)

Altitude: Max 15,200 m (50,000 feet)

7.6.5 Repackaging Requirements

  • If the instrument is being returned to the factory for service, please complete a repair tag with the fault details and attach it to the instrument.
  • Wrap the instrument in heavy paper or plastic. If the instrument is being shipped to the factory, attach a tag indicating the type of service required, return address, model number, and full serial number. Mark the container FRAGILE to ensure careful handling during shipment. In any correspondence, refer to the instrument by model number and full serial number.
  • Use a strong shipping container. A double wall carton made of 250 pound test material is adequate.
  • When the outer package is too large, provide firm cushioning around all sides of the instrument and prevent any movement inside the container. Especially note to protect the Front LCD touch screen, the Front panel and the Front test connectors.
  • Seal shipping container carefully and securely.

2.6.6 Daily Maintenance Requirements

Maintenance appropriate for the user is:

  • Instrument Cleaning: Clean the panel using a damp duster cloth only.
  1. Navigating the Displays

8.1 Menu Overview

Switch on PCM Channel Analyzer. You can see the main menu after this instrument starts up and enters the system, as shown in Figure 11. The main menu covers the “Voice Channel”, “E1 BER Test”, “Remote Control”, “Configuration Storage”, “Results Storage”, and “Other” functional modules. Here, “Voice Channel”, “E1 BER Test” and “Remote Control” are test function modules; “Configuration Storage” is used to store test setting parameters, so they may be recalled later for another test; “Results Storage” stores the test result, so that the user can analyze the test result and upload it to PC to generate a report; “Other” includes some basic information and basic settings of the instrument.

Figure 11:   Main Menu

8.2 Navigating the Displays

8.2.1 Voice Channel Menu

The “Voice Channel” menu consists of four modules: “Device”, “Test Mode”, “Settings” and “Options”.

8.2.1.1 Device

This menu provides “PCM Multiplexer”, “Carrier Equipment”, “Exchanger (E1)” and “Exchanger” for your selection, as shown in Figure 12. For different equipment, the system provides different test modules for you to choose, as shown in Table 6.

Figure 12:    “Voice Channel” Menu (a)

Table 6: “PCM Channel Measurement” Operating Options

8.2.1.2 Test Mode

This page provides “Mode”, “Channel” and “CAS Control” options, as shown in Figure 13. “Mode” contains “Auto” and “Manual”. The “Auto” test mode can test all the selected test parameters at one time, but the manual test mode can only test one parameter each time. “Channel” provides the “A-A Test”, “A-D Test”, “D-A Test” and “D-D Test” options. Certainly, test channels vary from different equipment under test. “CAS Control” decides whether to set up a channel or not before test.

Figure 13-1:    “Voice Channel” Menu (b)

Figure 13-2:    “Voice Channel” Menu (b) without option

a. A-A Test

After selecting a type in “Device”, go to the “Test Mode” menu, select “A-A Test”, and then set the “Settings” and “Options” menus. Go to the “Settings” menu, as shown in Figure 14.

Figure 14:    “Settings” Menu for A-A Test

Set relevant parameters as needed in the test. The parameters are described as below.

Table 7 describes parameter settings in interface type related to transmitter.

Table 8 describes parameter settings in output impedance related to transmitter.

Table 9 describes parameter settings in relative level (dBr) related to transmitter.

Table 7:  Interface Type Description

Table 8:  Output Impedance Description

Table 9:  Relative Level Description

For the parameter settings in interface type related to receiver, see the description about interface type settings of transmitter, as shown in Table 7.

Table 10 describes parameter settings in input impedance related to receiver.

For the parameter settings in relative level related to receiver, see the description about relative settings of transmitter, as shown in Table 9.

Table 11 describes reference setting parameters.

Table 10:  Input Impedance Parameter Settings

Table 11:  Nominal Selection Description

In “Test Mode”, the menus for “Auto” and “Manual” are different.

In “Manual“ test mode, you can select only one test item each time, and complete the test for a functional index, as shown in Figure 15.

Figure 15:    Manual Test Menu

In “Auto“ test mode, you can select to test one, several, or all of the functional indexes. When you select “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Return Loss”, “Longitudinal Conversion Loss” and “Longitudinal Conversion Transfer Loss”, you need to set the step, as shown in Figure 16.

Figure 16:    Auto Test Menu

Table 12 describes the step settings for “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Return Loss”, “Longitudinal Conversion Loss” and “Longitudinal Conversion Transfer Loss”.

Table 12:   Step setting Description

b. A-D Test

You can perform the A-D test only after selecting “PCM Multiplexer” or “Exchanger (E1)” from “Device” options. “A-D Test” is also called “Half-channel Device Coding Side” test, namely, the test is performed from the analog audio interface to the digital coding interface. In this case, PCM Channel Analyzer uses the analog signal generator and digital signal receiver. The standard test signal generated by the analog signal generator is sent to the equipment under test, and the digital signal receiver receives the signal to make measurement and analysis.

For “A-D Test”, the “Settings” menu and “Options” menu slightly differ from those of “A-A Test”, as shown in Figure 17.

Figure 17:    “Settings” Menu for “A-D Test

For settings of “A Tx”, see the relevant description in “A-A Test”. “D Rx” settings include selection of “Interface Impedance”, “Line Code”, “Framing” and “Code Type”, as shown in Table 13.

Table 13: “D Rx” Parameter Settings for A-D Test

ABCD Code Definition” is used to define the commands that represent various voice channel status.

For the definitions of “Nominal Level” and “Nominal Frequency”, please see the relevant description in “A-A Test”. Figure 18 shows the test items.

Figure 18:    “Options” Menu for A-D Test

PCM Channel Analyzer provides universal test masks for the user to call. The user can also design the proper mask using the host software and download it to the instrument. Prior to the test, select the desired mask, so that the instrument can make a judgment on the test result depending on the selected mask.

The “Options” menu for “A-D Test” enables you to set the Rx timeslot and select test items. Selecting the Rx timeslot sets the Rx timeslot of D Rx interface, and different Rx timeslots are selected for different framing.

D-A Test

You can perform the D-A test only after selecting “PCM Multiplexer” or “Exchanger (E1)” from test operation item. “D-A Test” is also called “half-channel device decoding side” test, namely, the test is performed from the digital decoding interface to the analog audio interface. In this case, PCM Channel Analyzer uses the digital signal generator and analog signal receiver. The standard digital audio test signal generated by the digital signal generator is sent to the equipment under test, and the analog signal receiver receives the signal to make measurement and analysis.

For “D-A Test”, the “Settings” menu and “Options” menu slightly differ from those for “A-A Test” and “A-D Test”, as shown in Figure 19.

Figure 19:    “Settings” Menu for D-A Test

For settings of “A Rx” interface, see the relevant description in “A-A Test”. “D Tx” interface settings include “Interface Impedance”, “Line Code”, “Framing”, “Tx Clock” and “Code Type”, as shown in Table 15.

Table 15: “D Tx” Parameter Settings for D-A Test

For settings of “ABCD Code Definition”, see the relevant description in “A-D Test”. For the definitions of “Nominal Level”, “Nominal Frequency” and “Mask Selection”, see the relevant description for “A-A Test”.

The “Options“ menu for “D-A Test” enables you to set the Tx timeslot and select test option. Selecting the Tx timeslot sets the Tx timeslot of D Tx, and different Tx timeslots are selected for different framing, as shown in Figure 20. Table 16 shows the optional timeslots.

Figure 20:   “Options” Menu for D-A Test

Table 16: Tx Timeslot Settings for D-A Test

For settings of “Test Selection”, see the relevant description in “A-A Test”.

c. D-D Test

You cannot perform the D-D test until selecting “PCM Multiplexer” or “Exchanger (E1)” from “Device” options. “D-D Test” completes the measurement from the digital interface to digital interface. In this case, PCM Channel Analyzer uses the digital signal generator and digital signal receiver. The standard digital test signal generated by the digital signal generator is sent to the equipment under test, and the digital signal receiver receives the signal to make measurement and analysis. Figure 21 shows the “Settings” menu.

Figure 21:    “Basic Settings” Menu for D-D Measurement

For the meanings of basic parameters which are on the window of the “D-D Test”, see the relevant descriptions for “A-D Test” and “D-A Test”, as shown in Figure 22.

Figure 22:    “Options” menu for D-D Test

You can select the Rx and Tx timeslots from the menu, and set “TX AS RX” or “DIVERSE”. Different Rx and Tx timeslots are selected for different framing. See the relevant descriptions for “A-D Test” and “D-A Test”.

For settings of “Test Selection”, see the relevant description in “A-A Test”.

3.2.2 E1 BER Test Menu

The “E1 BER Test” menu consists of the “Settings” and “Results” tabs. This function is used to measure the transmission quality of E1 channel signal and eliminate the E1 channel fault.

Parameters to be set on the “Settings” menu page: “Interface Impedance”, “Line Code”, “Framing”, “Tx Clock”, “Test Pattern”, “Polarity”, “Error Add” and “Timeslot Settings”, as shown in Figure 23. Table 17 describes “Interface Impedance” and “Line Code”.

Figure 23:    “Settings” Menu in E1 BER Test

Table 17:   Parameters description of “E1 BER Test” Menu (a)

Table 18 describes “Framing” parameters.

Table 18:    Parameter description of “E1 BER Test” Menu (b)

Table 19 describes “BERT Pattern” and “Polarity” parameters.

Table 19:   Parameters description of “E1 BER Test” Menu (c)

Table 20 describes “Tx Clock” parameters.

Table 20:    Parameter description of “E1 BER Test” Menu (d)

Table 21 describes “Error Add” parameters.

Table 21: Parameter description of “E1 BER Test” Menu (e)

For the settings of “Timeslot Settings”, see the relevant descriptions in “D-A Test” and “D-D Test”.

The “Results” menu page includes these test results: “Basic Analysis”, “G.821 Analysis”, “Signal Analysis” and “Alarm Seconds”, as shown in Figure 24. Table 22 describes the relevant parameters.

Figure 24:    “Results” Menu in E1 BER Test

Table 22:   Parameters description for “Results” of “E1 BER Test” Menu (a)

Table 23 describes the severities of alarm seconds in “Alarm Seconds”. The severities with alarm hierarchies 1 to 4 to define descend gradually, and the more important alarm will suppress a lesser alarm.

Table 23: Parameters description for “Results” of “E1 BER Test” Menu (b)

8.2.3 Remote Control Menu

The “Remote Control” module provides the COM port for the host software to control the instrument. The instrument can be controlled via the USB interface or Ethernet interface. After the “Remote Control” module is selected, the window for selecting the communication port appears. Select Ethernet or USB interface, as shown in Figure 25.

Figure 25:    Selecting a communication Port

Figure 26:    “Remote Control” Main Menu

Confirm the communication port to enter the “Remote Control” main menu. Now, you can use the host software to control the instrument. If you select the “Ethernet” communication port, the upper left part displays the IP address of current instrument, and the lower right part shows the “Exit” button. To exit from the remote control status, click “Exit”. See Figure 26.

8.2.4 Configuration Storage Menu

Go to the “Configuration Storage” main menu, as shown in Figure 27. After selecting a stored record, you can perform operations through “View”, “Recall”, “Rename”, “Delete” and “Main Menu”, etc, as described in Table 24.

Figure 27: “Configuration Storage” Main Menu

Table 24: Parameters description of “Configuration Storage” menu

8.2.5 Result Storage Menu

Figure 28 shows the “Result Storage” main menu. After selecting a stored result, you can perform operations via “View”, “Rename”, “Delete”, “Delete All” and “Main Menu”, etc, as described in Table 25.

Table 25:   Parameters description of “Result Storage

Figure 28:    “Result Storage” Main Menu

8.2.6 Others Menu

The “Others” menu consists of the “PC Communication”, “Time & Date”, “Miscellaneous”, and “Version” tabs.

8.2.6.1   “PC Communication

PC Communication” is used to set the communication port between the instrument and computer. You can select the USB or Ethernet interface. If you select the Ethernet interface, set IP parameters, and select “On” in the “Port State” box for communication, as shown in Figure 29.

Figure 29:    “PC Communication” Menu

8.2.6.2   “Time & Date

Change the time or date to the desired value, and click “OK” to make it take effect, as shown in Figure 30.

Figure 30:    “Time & Date” Menu

8.2.6.3   “Miscellaneous

The “Miscellaneous” menu contains three setting items: “Recalibrate”, “ITU-T Mask” and “Resume Default Settings”, as shown in Figure 31.

Figure 31:    “Miscellaneous” Menu

For the detailed operations of “Recalibrate”, see Chapter 2.

The “ITU-T Mask” module provides the user with ITU-T standards of all indexes, which can be used as a reference when necessary. Click “View” to display the page of HTML format, which lists the ITU-T standards of 9 major indexes.

Resume Default Settings” restores the instrument to factory default settings, and clears all the previous setting changes, stored setting information, test results, and other data. Before clearing, make sure that the useful test records in the instrument have been uploaded.

8.2.6.4 Version

The “Version” includes the instrument’s serial number and software & hardware version numbers.

  1. Performing Measurement

9.1 Overview

PCM Channel Analyzer contains the “A-A Test”, “A-D Test”, “D-A Test” and “D-D Test” modules, which can perform “Full-channel” analog measurement, “Half-channel Device Coding Side” measurement, “Half-channel Device Decoding Side” measurement, and “Digital Interface-Digital Interface” measurement.

PCM Channel Analyzer can measure the voice channel parameters such as “Level”, “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Idle Noise”, “Crosstalk”, “Return Loss”, “Longitudinal Conversion Loss” and “Longitudinal Conversion Transfer Loss”. Different parameters can be measured for different equipment under test. For more information, see Chapter 3.

9.2 Performing Measurement

9.2.1 Level

Level” (Namely “Net Attenuation Level“): Input/Output relative level of PCM channel transferring/connecting point, also called relative level. Accurate transmission level is one of the basic characteristics which guarantee the communication quality of PCM channel. It is also the key parameter to keep the circuit stability and the basement of other PCM characteristics. The causes of inaccuracy are: Trifling deviations are brought by level variations of voice channel, PCM channel, coder/decoder and reference power supply. Serious deviations are brought by attenuator obstruction, coder/decoder malfunction and etc.

Measurement Method:

In the “Manual“ and “Auto“ test modes, the default output of signal generator is 1020 Hz sine-wave at a level of -10 dBm0. It is adjustable. Suppose the actual measuring result the receiver displays is RdBm0. And when the Tx level is -10dBm0, the level value of result must meet the criterion as follows:

4 W :|R- (-10)|≤ 0.6

2 W :|R- (-10)|≤ 0.8

9.2.2 Gain Frequency Dependent

Gain Frequency Dependent“, also named with “Attenuation/Frequency Feature“ or “Variation of Gain with Frequency“ or “Frequency/Attenuation Distortion“, is mainly intended to evaluate the Amplitude/Frequency characteristics of low-pass filters in PCM channel circuits. Measurement is carried out in 200 Hz to 3600 Hz frequency range with the reference point at the attenuation of -10 dBm0/1020 Hz. The step is chosen depending on the frequency scale (linear or logarithmic). The frequency is set continuously corresponds to one screen point in the graphic display. And the differential between the referred frequency attenuation and all the other frequency attenuation should lie within the limits shown in the ITU-T mask. 0dBm0 and -10dBm0 are available as output level. The less the variation of gain with different frequencies is, the better the definition and naturalness of the PCM is. This parameter will not influence the transmission of PCM too much. But it can affect variation of brightness in fax signal, such as possibly causing little strip and fleck in the image. The causes of inaccuracy are brought by the frequency distortions of the amplifiers, filters and mixed coils.

Measurement Method:

In the “Manual“ test mode, the default output of the signal generator is at a power level of -10 dBm0. It is adjustable. And the measurement is carried out by different frequencies in 200 Hz~3600 Hz. Firstly, you should adjust the signal frequency to 1020 Hz. Then press “Adjust to Zero” button to set zero as test norm. At this time, the measuring result on the display should be “0” dB. Then you can change the Tx frequency of output signal and read the corresponding results directly. The measuring results can be evaluated by the built-in ITU-T mask.

In the auto test mode, the measurement will be automatically made.

9.2.3 Gain Level Dependent

Gain Level Dependent“, also named with “Variation of Gain with Input Level“ or “Amplitude Characteristic“, mainly reflects the non-linearity of gain on the equipment under test. The signal output of transmitter is a 1020 Hz sine wave. And the level is adjustable in the range from -55 dBm0 to +3 dBm0. The causes of

inaccuracy: in small signal area, variations are brought by sampling and quantizing of PCM signals; in big signal area, variations are mainly brought by overload of the amplifiers in analog circuits and encoder circuits.

Measurement Method:

In measurement of Gain Level Dependent of “Manual“ test mode, the default output signal of generator is at the frequency of 1020 Hz.. It is adjustable. Firstly, you should set the value of transmit level to -10 dBm0. If the measure result is not “0 dB”, you need to adjust to zero to keep the accuracy of the test. Then press “Adjust to Zero” button to set zero as test norm. At this time, the measuring result on the display should be “0” dB. Then you can change the Tx level of output signal and read the corresponding results directly. The measuring results can be evaluated by the built-in ITU-T mask.

In the “Auto” test mode, the measurement will be taken automatically.

9.2.4 Total Distortion

Total Distortion”, also named with “Quantizing Distortion”, mainly reflects the quality of the Encoder/Decoder including sampling, quantizing, encoding and filtering. It has strong relationship with the signal, thus is one important particular characteristic in PCM system. It will not exist until there is signal. Also, different test signal will cause different distortion. With a sine wave test signal at the nominal reference frequency of 1020 Hz applied to the input port of a channel, the ratio of signal-to-total distortion power measured with proper noise weighting at the output port should lie above the limits shown in ITU-T mask. Total distortion can be measured by using the sine wave method.

Measurement method:

Sine wave method: In the “Manual“ test mode, the default output signal of generator is at the frequency of 1020 Hz. It is adjustable. The measuring results can be evaluated by built-in ITU-T mask. In the “Auto“ test mode, the measurement will be taken automatically.

9.2.5 Idle Noise

Idle Noise“ is one type of noise when the PCM channel is in idle status. The noise is mainly brought by heat noise, cacophony, no-load encoding noise, sampling pulse leakage noise, power interferences, but barring Crosstalk noise. If there is no service in 30 PCM channels of PCM system, the background noise will influence PCM quality. The idle noise forms background noise that affects the quality of the call. As a result, the white background of fax image is mixed with black spots, and the black part is mixed with white spots. The causes of noise are the mixture formed by no-load noise of encoding at input ports of encoder and noise of decoder circuits in or after the decoding.

Measurement method:

In “Manual“ mode and “Auto“ mode, the output port of the transmitter is configured as the terminal matching impedance. Thus, when performing test, no additional terminal matching impedance is needed. The measuring results can be evaluated by the built-in ITU-T mask automatically and displayed on screen directly.

9.2.6 Crosstalk

Crosstalk“ indicates that one PCM signal enters into another neighboring or other PCM channel, causing the disturbance to the latter and the loss of privacy in the main voice channel communication. The causes of crosstalk are brought by excursion of encoder working spot and quantizing inaccuracy of decoder. In the encode/decode circuits, single-channel encoder/decoder has less possibilities of crosstalk than that of multi- channels.

Measurement method:

Crosstalk measurement is different from other measurements described above. The measurement is carried out by main-crosstalk channel and passive-crosstalk channel. The channel that transmits signals is the main-crosstalk channel, and the one that is interfered by main-crosstalk one is the passive-crosstalk channel. The signal is sent on the main-crosstalk channel, and the measurement is received at the passive-crosstalk channel.

9.2.7 Return Loss

The “return loss“ of analog interface, also called reflection attenuation, ensures good matching of Tx end and Rx end at both sides of the interface. The actual impedance value of interface always differs from the nominal value, and is indicated by the reflection coefficient:

ρ=| ZN-ZX | / | ZN+ZX |

In the formula, ZN = nominal impedance, ZX = actual impedance.

When ZN = ZX, the matching is the best, i.e., there is no reflection when the signal passes by the interface, and energy is most effectively passed. In this case, ρ=0, and return loss is:

bρ=20 lg (1/ρ) =∞

Return loss indexes:

2-wire:    bρ>12 dB (300 ~ 600 Hz)

bρ >15 dB (600 ~ 3400 Hz)

4-wire (Tx): bρ > 20 dB (300 ~ 3400 Hz)

4-wire (Rx): bρ > 20 dB (300 ~ 3400 Hz)

9.2.8 Longitudinal Balance Loss

Longitudinal balance loss“ is used to measure the balance degree of input interface or output interface of PCM channel to the ground. The input interface and output interface of PCM channel are connected to the exchanger or user. It will be affected by the external electromagnetic interference if the connection line is very long, e.g., strong electric interference may induce the longitudinal voltage or longitudinal current at the wire pair. If the balance of audio interface to the ground is big, this longitudinal interference affects the audio interface slightly, and vice versa.

Longitudinal balance loss can be indicated by using “longitudinal conversion loss“ and “longitudinal conversion transfer loss“. Longitudinal conversion loss is used to measure the balance feature of input interface in PCM channel, and longitudinal conversion transfer loss is used to measure the balance feature of output interface in PCM channel.

2-wire: longitudinal balance loss of the audio interface

300 ~ 600 HZ > 40 dB
600 ~ 2400 HZ > 46 dB
2400 ~ 3400 HZ > 41 dB

4-wire: longitudinal balance loss of the audio input interface and audio output interface

300 ~ 2400 HZ > 46 dB
2400 ~ 3400 HZ > 41 dB

9.3 A-A Test

9.3.1 Performing 2-wire Voice Channel Test

Before using PCM Channel Analyzer to perform test on FXO-FXS or FXS-FXS, you must set up the voice channel first, and then begin to test the indexes. The following part, taking the exchanger and PCM multiplexer for example, describes the test method, which can be used as a reference for other equipment.

9.3.1.1 Setting up the Condition of Test

  • Hardware: 1 exchanger (or 2 PCM multiplexers), 1 PC, and 1 PCM Channel Analyzer
  • Software: 1 set of exchanger (or PCM multiplexer) management software

9.3.1.2 Test Description

Since PCM Channel Analyzer is designed with the built-in bridge circuit, you can take test of “Level”, “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Idle Noise”, “Return Loss”, “Longitudinal Conversion Loss” and “Longitudinal Conversion Transfer Loss” with only one set of PCM Channel Analyzer, i.e., no other auxiliary device is needed.
9.3.1.3 Test Method of
Level, Gain Frequency Dependent, Gain Level Dependent, Total Distortion, Idle Noise, Return Loss, Longitudinal Conversion LossandLongitudinal Conversion Transfer Loss

Description

  1. Exchanger FXS-FXS test
    • Connect the instrument as shown in Figure 32.
    • The steps of exchanger FXS-FXS test is explained below in detail.

Figure 32:    Exchanger FXS-FXS test

  • Power on PCM Channel Analyzer, click “Voice Channel“ to enter the “Setting” menu, and select “Exchanger“ as the equipment under test. Then, go to the test mode menu, select “A-A Test”, and select “Manual“ mode or “Auto“ mode as required by the test.
  • Go to the “Settings“ menu, and set all the interface types of instrument to FXS. The input (output) impedance and relative level must be consistent with the equipment under test.
  • Go to the “Options“ menu, and select desired test option.
  • After settings, click “Start test” at the lower right part of the menu. The dialog box of dial-up appears, asking you to enter the number to be called, so as to set up the test channel.
  • After the dial-up is completed, the instrument automatically enters the test status to start test. Also, the result menu will be automatically displayed.
  1. PCM multiplexer FXS-FXS test
    • Connect the instrument as shown in Figure 33.
    • To take the PCM multiplexer FXS-FXS test, you need 2 sets of PCM multiplexers and use the back-to-back connection mode at the local end. Connect together the E1 interfaces of 2 PCM multiplexers and connect through the 2-wire PCM channel interface, which is the so-called hot line mode (the PCM channel interface of local equipment and that of remote equipment are both FXS).
    • The procedure of PCM multiplexers FXS-FXS test is the same as that of exchanger FXS-FXS test.

Figure 33: Connection for PCM multiplexer FXS-FXS Test

  1. FXO-FXS test

If you perform test of FXO-FXS, you should modify the interface to FXO. For the FXO-FXS test method, refer to FXS-FXS, as shown in Figure 31 and Figure 32.

  1. 2W E&M-2W E&M test

If you perform test of 2W E&M-2W E&M, you should modify the interface to 2W E&M. For the 2W E&M-2W E&M test method, refer to FXS-FXS, as shown in Figure 32.

  1. MRD-MRD test

If you perform test of MRD-MRD, you should modify the interface to MRD. For the MRD-MRD test method, refer to FXS-FXS. See Figure 32.

9.3.1.4 Test Method of Crosstalk

  • Crosstalk can be differentiated with the near-end crosstalk (NEXT) and far-end crosstalk (FEXT). We will discuss the test methods of crosstalk below in detail.

a. Near-end crosstalk (NEXT) ‹

Description

Before using PCM Channel Analyzer to perform “Crosstalk” test of the PCM channel of FXO-FXS or FXS-FXS, you must set up two PCM channels, and need ICT, OGT and 600Ω matching impedance.

  • FXS-FXS NEXT test (PBX)

Connect the instrument as shown in Figure 34.

Figure 34:    FXS-FXS NEXT Test (PBX)

Procedure of FXS-FXS NEXT test (PBX)

  • Connect four telephones to the exchanger, as shown in Figure 33.
  • Power on PCM Channel Analyzer, click PCM channel test to go to the “Settings” menu, and select exchanger as the equipment under test. Select the “Manual“ test mode (not automatic dial-up), and set all the interface types to FXS. The input (output) impedance and relative level must be consistent with the equipment under test.
  • Select “Crosstalk” from test Options, and click “Start Test”.
  • Put up telephone A on hook, and call telephone B, then telephone B rings, put telephone B up, we confirm the telephone A has connected to telephone B.
  • Connect the Rx of PCM Channel Analyzer to “a”, and connect the DC LOOP A to “b”, then disconnect telephones A and B from the exchanger. PCM Channel Analyzer provides feeding voltage to FXS interface based on the built-in DCHC circuit (D.C. Loop Holding Circuit), this function can hold the connection with the DC LOOP A effectively.
  • Put up telephone C on hook, and call telephone D, then telephone D rings, put telephone D up, we confirm telephone C has connected to telephone D.
  • Connect the Tx of PCM Channel Analyzer to “c”, and connect the DC LOOP A to “d”, then disconnect telephones C and D from the exchanger. PCM Channel Analyzer provides feeding voltage to FXS interface based on the built-in DCHC circuit (D.C. Loop Holding Circuit), this function can hold the connection with the DC LOOP A effectively.
  • Now, you can view the real-time results of measurement on the result menu.
  • FXO-FXS NEXT test (PBX)

If you perform test of FXO-FXS, you should modify the interface to FXO. The FXO-FXS test method is referred to FXS-FXS. See Figure 35.

Figure 35:    FXO-FXS NEXT Test (PBX)

  • FXS-FXO NEXT test (PBX)

If you perform test of FXO-FXS, loop holding circuit A and loop holding circuit B should be feed bridge A and feed bridge B respectively. For the connection method, see Figure 35. For the test procedure, see FXS-FXS NEXT test (PBX).

b. Far-end crosstalk (FEXT)

‹ Description

FEXT test is different from NEXT, and the main difference is connection. Normally, the crosstalk test of 2-wire PCM channel can be used when you measure the 2W E&M channel.

  • 2W E&M-2W E&M FEXT test

Connect the instrument as shown in Figure 36.

Figure 36:    2W E&M-2W E&M FEXT Test

Procedure of 2W E&M-2W E&M FEXT test

  • As shown in Figure 36, connect PCM Channel Analyzer to the PCM multiplexer, and connect matching impedance accordingly.
  • Power on PCM Channel analyzer, enter the PCM channel test setting menu, select the “Manual“ test mode, and set all the interface types to 2W E&M. The input (output) impedance and relative level must be consistent with the equipment under test.
  • Press “Start Test“ on the display to directly view the real-time results of test.

9.3.2 Performing 4-wire PCM Channel Test

Before using PCM Channel Analyzer to perform the 4W E&M-4W E&M test, you must ensure the correct connection mode and instrument settings. We will discuss the test methods below in details.

9.3.2.1 Setting up the Condition of Test

Hardware: 1 exchanger (or 2 PCM multiplexers), 1 PC, and 1 PCM Channel Analyzer

Software: 1 set of exchanger (or PCM multiplexer) management software

Accessories: Capacitance and matching impedance

9.3.2.2 Test Description

One set of PCM Channel Analyzer can directly measure the “Level”, “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Idle Noise”, “Return Loss”, “Longitudinal Conversion Loss” and “Longitudinal Conversion Transfer Loss” PCM channel indexes.

If you want to perform test of “Crosstalk”, pay attention to that the test needs peripheral circuits of matching impedance.

9.3.2.3 Test Method of Level, Gain Frequency Dependent, Gain Level Dependent, Total Distortion, Idle Noise, Return Loss, Longitudinal Conversion LossandLongitudinal Conversion Transfer Loss

  • Description

For the standard 4-wire PCM channel test, you need 2 sets of PCM multiplexer and use the back-to-back connection mode and the local end. Connect together the E1 interfaces of 2 PCM multiplexers, configure the interfaces accordingly, and connect through 4W E&M of 2 PCM multiplexers. Then, you can perform the test by using 1 set of PCM Channel Analyzer.

  • Test

Connect the instrument as shown in Figure 37.

Figure 37:  Connection for 4W E&M Measurement

Procedure of 4-wire PCM channel test

  1. Connect the 4W E&M from PCM multiplexer A to PCM multiplexer B.
  2. Connect Tx+ and Tx- of PCM multiplexers B to Rx of PCM Channel analyzer.
  3. Connect Rx+ and Rx- of PCM multiplexers A to Tx of PCM Channel Analyzer.
  4. Power on PCM Channel Analyzer, and select the “Interface Type” of the transmitter and receiver as “4W E&M” on the “Settings” menu. Keep the transmitter and receiver impedances as identical as ones of equipment under test and keep transmitting and receiving relative level as identical as the ones of equipment under test.
  5. Go to the “Options“ menu and select desired test items.
  6. After settings, click the “Start Test” button at the lower right part of menu. The instrument automatically enters the test status. Also, the result menu will be automatically displayed.

9.3.2.4 Test Method of Crosstalk

  • Crosstalk can be differentiated with the near-end crosstalk (NEXT) and far-end crosstalk (FEXT). Crosstalk test is different from other tests. The test is carried out by main-crosstalk channel and passive-crosstalk channel. The channel that transmits signals is the main-crosstalk channel, and the channel that is interfered by main-crosstalk one is the passive-crosstalk channel. We will discuss the test methods of crosstalk below in details.
  1. Near-end crosstalk (NEXT) test (4W)

‹ Description

In order to test 4W-4W NEXT, set up two PCM channels, and need 600Ω matching impedance.

  • 4W-4W NEXT test

Connect the instrument as shown in Figure 38.

Figure 38:    4W-4W NEXT Test

Procedure of 4W-4W NEXT test

  • Connect the 4W E&M from PCM multiplexer A to PCM multiplexer B.
  • Connect Tx of PCM Channel Analyzer to the first 4W E&M (Rx+ and Rx-) of PCM multiplexer A via test cable. And connect the matching impedance between the first 4W E&M (Rx+ and Rx-) of PCM multiplexer B.
  • Connect Rx of PCM Channel Analyzer to the second 4W E&M (Tx+ and Tx-) of PCM multiplexer A. And connect the matching impedance between the second 4W E&M (Rx+ and Rx-) of PCM multiplexer B.
  • Power on PCM Channel Analyzer, and select “Interface Type” of Tx and Rx as “4W E&M” in the “Settings” menu. Keep the Tx and Rx impedances as identical as the ones of equipment under test and keep input and output relative level as identical as the ones of equipment under test.
  • Select the “Manual” test mode and “Crosstalk” from test items.
  • Press the “Start Test“ button on the display to directly view the real-time results of test.

2. Far-end crosstalk (FEXT)

‹ Description

FEXT test is different from NEXT, and the main difference is connection.

  • 4W-4W FEXT test

Connect the instrument as shown in Figure 39.

R1=R2 Nominal impedance (the resistance error is not greater than 0.5%)

Figure 39:    4W-4W FEXT Test

For the procedure of 4W-4W FEXT test, see the procedure of 4W-4W NEXT test.

9.4 A-D Test

You can perform A-D test only when you select the “PCM multiplexer“ or “Exchanger (E1)“. In addition, in the A-D test, you can measure only “Level”, “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Idle Noise” and “Crosstalk“.

9.4.1 Test Method of Level, Gain Frequency Dependent, Gain Level Dependent, Total Distortion and Idle Noise

Figure 40 shows the connection for the instrument under the test.

Figure 40:    Connection of A-D Test

To perform the test:

  1. Select “PCM Multiplexer” or “Exchanger (E1)” and one channel, and select “A-D Test”. You can select “Manual” or “Auto”.
  2. Complete “Settings”. Make sure that the set parameters are matched with requirements of the channel under test.
  3. Select the Rx timeslot, and confirm that the Rx timeslot can receive the data sent from your Tx end.
  4. Select the test index. In the case of “Manual” test, you can measure only one index each time. In the case of “Auto“ test, you can measure six indexes at one time.
  5. After settings, click “Start Test”. The instrument automatically switches to the result menu to display the test result.

9.5 D-A Test

You can perform D-A test only when you select “PCM Multiplexer” or “Exchanger (E1)”. In addition, in the D-A test, you can measure only “Level”, “Gain Frequency Dependent”,

Gain Level Dependent”, “Total Distortion”, “Idle Noise” and “Crosstalk“.

9.5.1 Test Method of Level, Gain Frequency Dependent, Gain Level Dependent, Total Distortion and Idle Noise.

Figure 41 shows the instrument connection for the test.

Figure 41:  Connection of D-A Test

To perform the test:

  1. Select “PCM Multiplexer” or “Exchanger (E1)” and one channel, and select “D-A Test”. You can select “Manual” or “Auto”.
  2. Complete “Settings”. Make sure that the set parameters are matched with requirements of the channel under test.
  3. Select the Tx timeslot.
  4. Select the test index. In the case of “Manual“ test, you can measure only one index each time. In the case of “Auto“ test, you can measure six indexes at a time.
  5. After settings, click “Start Test”. The instrument automatically switches to the result menu to display the test result.

9.6 D-D Test

You can perform D-D test only when you select “PCM Multiplexer” or “Exchanger (E1)”. In addition, in the D-D test, you can measure only “Level”, “Gain Frequency Dependent”,

Gain Level Dependent”, “Total Distortion”, “Idle Noise” and “Crosstalk“.

9.6.1 Test Method of Level, Gain Frequency Dependent, Gain Level Dependent, Total Distortion and Idle Noise

Figure 42 shows the instrument connection for the test.

Figure 42:    Connection of D-D Measurement

To perform the test:

  1. Select “PCM Multiplexer” or “Exchanger (E1)” and one channel, and select “D-D Test”. You can select “Manual” or “Auto”.
  2. Complete “Settings”. Make sure that the set parameters are matched with requirements of the channel under test.
  3. Select the Tx and Rx timeslot.
  4. Select the test index. In the case of manual measurement, you can measure only one index each time. In the case of automatic measurement, you can measure six indexes at a time.
  5. After settings, click “Start Test”. The instrument automatically switches to the result menu to display the test result.

9.7 E1 BER Test

PCM Channel Analyzer is integrated with the E1 BER test module, and can send the pseudorandom code, detect BER, and complete the signal analysis and alarm analysis. It is the effective tool for E1 line or system maintenance and overhauling. Depending on the test connection mode, the test can be classified into far-end loop back test and mutual test, as shown in Figure 43 and Figure 44.

Figure 43: Loop back Test of BER

Figure 44:    Mutual Test of BER

To perform the test:

a. Select the “E1 BER Test” function.

b. Go to the “Settings” menu to perform relevant settings, including “Interface Impedance”, “Line Code Type”, “Framing”, “Tx/Rx Timeslots”, “Tx Clock” and “Code Type” and “BERT Pattern”. Set the first four items according to the actual status of the tested system, so as to ensure correct settings.

c. You can select one of the above two test modes as actually needed.

d. After the settings and line connection are completed, click “Start Test” to go to the result menu. The instrument will complete the test and display the test result.

10. Working with TestManagerPro

 Software Functions

TestManagerPro communicates with PC and PCM Channel Analyzer via USB port or Ethernet port. It can support uploading the test results stored in the instrument to PC, viewing and printing the stored results. You can easily check, manage and analyze every test result on your PC. It also can describe all the events happened in the test period time in detail in histogram and display all information relative to the events, as well as helping you in classification, viewing and deletion of the test results. Another very important function of TestManagerPro is that you can online upgrade the embedded software in the instrument with this PC software securely and reliably.

Basic functions of TestManagerPro:

  • Select the type of the instrument.
  • Connect the instrument.
  • Upload the test results stored in the instrument.
  • View the stored results.
  • Analyze the stored results.
  • Clean up the records uploaded.
  • Print the test results with the graphics, table or text mode.
  • Manage the configuration files.
  • Synchronize the configuration files.
  • Upgrade the embedded software.
  • Help

11.2 System Configuration and Running Environment

11.2.1 Hardware configuration

Basic configurations required:

PC: 586/133MHz or better Memory: above 64MB
Hard disk: above 50MB CD-ROM drive for installation
Standard mouse and keyboard USB port
Windows-compatible printer NIC and network cable

11.2.2 Software configuration
Operating system:

  • Windows 2000/XP

System Configuration Recommendation

  • System display resolution: 1024×768 Pixels
  • Install the printer before setup

 Install and Uninstall the Software on the PC

Installation Process

  • Close all programs and turn off virus protection software to prevent installation confliction.
  • Open the package and take out the data CD with the mark of “TestManagerPro”;
  • Insert the CD into the CD-ROM drive;
  • View the content of the CD from “My Computer”;
  • Double-click “exe”;
  • Complete the installation according the setup wizard;
  • After installation of the software, one short-cut icon “TestManagerPro” will be placed on the desktop automatically;
  • Double-click the icon “TestManagerPro” to run the program.

Uninstall TestManagerPro

  • From the “Start” menu, choose “Settings”;
  • Open “Control Panel”;
  • Click “Add/Remove Programs”;
  • Select “TestManagerPro” in the list;
  • Click the “Change/Remove” button to remove the software automatically.

How to Use TestManagerPro

Connecting the Instrument to the PC

Connect the instrument to the PC using a network cable or USB cable. Open the corresponding communication port on the “Others” menu, select PCM Channel Analyzer in the TestManagerPro software, and click “Connect”. Select the communication port opened at the instrument for connection. For the network interface, change the connected IP to the current IP of the instrument. You can view the IP at the instrument.

 TestManagerPro Software Operation

Graphic user interfaces help the user operate TestManagerPro software with great ease. The user can work with TestManagerPro by following the process provided later in this manual and the instructions given on the screens, as shown in Figure 45.

Configuration Description

This section further describes operations of the newly-added “Manage Configuration Files” and “Synchronize Configuration Files” functions.

Figure 45:    TestManagerPro Operation Flow Chart

Manage Configuration Files

The function of configuration file management is used to set some specific test points or scopes to make certain restrictions, and configure these settings in the instrument as the judgment criteria via the data transmission cable. The test value of the instrument is compared with the configured value to judge if the test requirement meets the requirement, and the mask diagram will be automatically drawn or data will be displayed according to the set point.

Operation procedure

  1. Select the “Manage Configuration Files” button on the main menu to display a dialog box for you to make selection.
  2. You can view the ITU option only. The ITU setting indexes are used as the criteria of “Level”, “Gain Frequency Dependent”, “Gain Level Dependent”, “Total Distortion”, “Idle Noise”, “Crosstalk”, “Return Loss”, “Longitudinal Conversion Loss” and “Longitudinal Conversion Transfer Loss”. If “New” is selected, the test operator will set the test point or test scope based on the test requirement and set the above nine indexes, and use the settings as the corresponding test criteria (the newly-created test criteria can be modified or deleted). In the example below, “New” is selected to enter the next dialog box.
  3. Input the “Configuration Name” in “Configure Basic Info”. Select the index item to be set, and then click “Next”.
  4. Level” setting: To test a certain Tx level or frequency, select the “Customized Test Point” option, so that the Tx level or frequency is effective. Enter the test scope in the level mask configuration, and then select “Next”.
  5. Gain Frequency Dependent” setting: After the “Customized Test Point” option is selected, you can enter the frequencies to be tested in the first group and second group. Input in the “Gain Frequency Dependent” mask configuration every top coordinate value (the “A-A”, “A-D”, “D-A” and “D-D” options are available, and the setting result can be viewed by clicking the “Preview Mask” button) used to draw the 4-wire (2-wire) mask diagram, and then select “Next”.
  6. Gain Level Dependent” setting: After the “Customized Test Point” option is selected, you can enter the level points to be tested in the first group and second group. Input in the “Gain Level Dependent” mask configuration every top coordinate value (the “A-A”, “A-D”, “D-A” and “D-D” options are available, and the setting result can be viewed by clicking the “Preview Mask” button) used to draw the 4-wire (2-wire) mask diagram, and then select “Next”.
  7. Total Distortion” setting: After the “Customized Test Point” option is selected, you can enter the level points to be tested in the first group and second group. Total distortion can be measured using the sine wave method and noise method. Their settings are consistent. Similarly, input in the “Total Distortion” mask configuration every top coordinate value (the “A-A”, “A-D”, “D-A” and “D-D” options are available, and the setting result can be viewed by clicking the “Preview Mask” button) used to draw the 4-wire (2-wire) mask diagram, and then select “Next”.
  8. Idle Noise” setting: Directly input in the “Idle Noise” mask configuration the test scope value, and then select “Next”.
  9. Crosstalk” setting: Directly input in the “Crosstalk” mask configuration the test scope value, and then select “Next”.
  10. Return Loss” setting: After the “Customized Test Point” option is selected, you can input the frequencies to be tested in the first group and second group. Input in the “Return Loss” mask configuration every top coordinate value (the setting result can be viewed by clicking the “Preview Mask” button) used to draw the 4-wire (2-wire) mask diagram, and then select “Next”.
  11. Longitudinal Conversion Loss” setting: After the “Customized Test Point” option is selected, you can input the frequencies to be tested in the first group and second group. In the “Longitudinal Conversion Loss” mask configuration, input every top coordinate value (the setting result can be viewed by clicking the “Preview Mask” button) used to draw the 4-wire (2-wire) mask diagram, and then select “Next”.
  12. Longitudinal Conversion Transfer Loss” setting: After the “Customized Test Point” option is selected, you can input the frequencies to be tested in the first group and second group. In the “Longitudinal Conversion Transfer Loss” mask configuration, input every top coordinate value (the setting result can be viewed by clicking the “Preview Mask” button) used to draw the 4-wire (2-wire) mask diagram, and then select “Finish”. Then, the new settings are successfully saved in configuration file management.

Synchronize Configuration Files

The configuration file synchronization function is used to configure the setting information, which is in configuration file management, into the instrument via the network cable or USB cable, so as to implement multiple standard masks and customized masks, manually modify the test mask, and keep synchronization.

11. Uploading Stored Results

After the instrument is connected to your PC as described in Section 6.4.1, click the “Upload Record” button on the toolbar of main menu to display the dialog box of uploading records. Click the “Upload” button in the dialog box to start uploading the records. In the case of too many records to be uploaded, it is recommended to transfer them over the network.

12. Upgrading Embedded Software

After the instrument is connected to your PC as described in Section 6.4.1, click “Upgrade Software” in the “System” menu to display the upgrade dialog box. Select the relevant files based on the content to the upgraded, and then click “Start”. Two types of upgrade files are available: the main program execution file, system database file. It is recommended to use the Ethernet interface to upgrade the main program, because it will take a long time if using the USB port.

13. Troubleshooting

This chapter is intended to provide prompt help to operator on some frequently asked questions and the relevant resolutions.

1)    Why can’t the instrument be powered on?

  • Check whether the AC power cable is well connected or not.
  • Check whether the AC power fuse is burned out or not.

2)    Why is the test error too big?

  • Check whether the instrument and equipment under test is well grounded or not.
  • Check whether the cable connection of the tester is right and the Interface Type, Input/Output Impedance and Relative Level are configured right or not.
  • Check whether the instrument can work normally or not by self-loop test.
  • What should I do when power interruption/disconnection of cable occurs in upgrading the embedded software and the instrument fails to upgrade?
  • Check the power supply and cable connection and get rid of the issues.
  • Power on the instrument.
  • Re-upgrade the embedded software by TestManagerPro.

4)    Get more help

If you have any other questions, please contact with your vendor by phone or emails as soon as possible.