Option Verification 5-12 E1 Analyzer Verification, Option 52
MT8212E and MT8213E MM PN: 10580-00255 Rev. J 5-61
E1 Transmit Level Test Verification
The tests in this section verify the transmit level of the E1 signal from the MT821xE in E1 Analyzer mode.
Procedure
BNC (75 Ohm unbalanced [Single End]) Interface Check:
1. Install the LeCroy PP090 75 ohm Telecom Adapter to the Channel 1 input of the LeCroy Oscilloscope.
2. Connect the 75 ohm BNC cable (part number 3-806-169) from the Tx port on the E1 interface of the
MT821xE to the 75 ohm adapter on the Oscilloscope.
3. Set the MT821xE to E1 Analyzer mode and preset the instrument.
4. Use the rotary knob to highlight Input Connector and then press the BNC 75 Ohms soft key to switch the
input connector.
5. Press the Pattern main menu key and use the Right Arrow key to highlight All Ones. Press the
Select Pattern soft key.
6. On the LeCroy Oscilloscope, use the stylus to tap on File on the Toolbar. Press Recall Setup… and then
tap the Recall Default button to reset the Oscilloscope.
7. Press the Auto Setup key and then tap the Confirm button. Wait until the oscilloscope displays a stable
trace.
8. Tap on Measure on the Toolbar and select Std Vertical.
9. Record the displayed P1 peak-to-peak voltage in the 75 ohm row of Table A-57, “Option 52, E1
Transmitted Level Voltage” on page A-40.
10. Verify that the measured peak-to-peak voltage is between 4.2 volts and 5.2 volts.
11. Disconnect the BNC cable from the Oscilloscope and connect it to the Rx port on the MT821xE .
12. On the MT821xE, press the Measurements main menu key and press Rx Signal.
13. Press the Start/Stop main menu key to turn measurement On (“Measure ON” appears in the lower left
corner of the display).
14. Read the Vpp value from the displayed table and record the value in the 75 ohm row of Table A-58,
“Option 52, E1 Transmitted Level Vpp Reading” on page A-40.
RJ48 (120 Ohm balanced [Differential Pair]) Interface Check:
15. Install the LeCroy AP120 120 ohm Telecom Adapter to the Channel 1 input of LeCroy Oscilloscope.
16. Connect the RJ48 end of the Bantam “Y” Plug (part number 806-117) to the E1 RJ48 interface of the
MT821xE .
17. Connect the Transmit Bantam plug of the Bantam “Y” cable to the T3450 Test Fixture, and then connect
a bantam plug to the Siemens jack adapter cable between the open Bantam jack on the T3450 Test
Fixture and the Siemens connector of the Telecom adapter on the Oscilloscope.
18. Set the MT821xE to E1 Analyzer mode and preset the instrument.
19. Use the rotary knob to highlight Input Connector and then press the RJ48 120 Ohms soft key to switch the
input connector.
20. Press the Pattern main menu key and use the Right Arrow key to highlight All Ones. Press the
Select Pattern soft key.
21. On the LeCroy Oscilloscope, use the stylus to tap on File on the Toolbar. Select Recall Setup… and then
tap the Recall Default button to reset the Oscilloscope.
22. Press the Auto Setup key and then tap the Confirm button. Wait until the oscilloscope displays a stable
trace.
23. Tap on Measure on the Toolbar and select Std Vertical.
24. Record the displayed P1 peak-to-peak voltage in the 120 ohm row of Table A-57.
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