HP 37717C Calibration Manual page 221

C AU T I O N
N OTE
Performance Tests
STM-1/STM-4 Optical Interface (Options UKT, USN)
16. Verify that the front panel LASER ON led is off before continuing.
17. Disconnect the Optical Attenuator Output from the HP 8153A and connect to the
HP 37717C Optical In Port.
18. Press then
OTHER
RECEIVER [COUPLED].
19. Press
TRANSMIT
20. Press
TROUBLE SCAN
RESULTS
measurement.
21. After 5 minutes check that NO TROUBLE is displayed on the
display.
22. Repeat steps 10 through 21, selecting SIGNAL [STM-4 OPT] [1310 nm] in steps
13 and 19 and -28 dBm in step 14.
23. Recall the HP 37717C DEFAULT SETTINGS as shown on 3-2.
24. Disconnect the optical cable from the HP 37717C STM1/4 Optical IN Port and
connect to the HP 83442A Optical/Electrical Converter input.
25. Connect the output from the Optical /Electrical Converter to the Oscilloscope
using the SMA/BNC adaptor and 50
26. Set the Dual Power Supply to +12V and -12V, then connect to the HP 83442A O/
E Converter and switch on.
Take care to connect the supply correctly as incorrect voltage or polarity could result
in damage to the HP 83442A. Refer to HP 83442A Operating Instructions, HP p/n
5091-6448A.
27. Press
TRANSMIT
[1310 nm].
28. Press
AUTOSCALE
obtain an STM-4 waveform.
29. Measure the amplitude of this STM-4 waveform using the oscilloscope and adjust
the Optical Attenuator until the amplitude is 150mV pk-pk.
If the input power is greater than -8 dBm then the Optical/Electrical converter is liable
to saturate.
3-112
SETTINGS CONTROL
and select SIGNAL [STM-1 OPT] [1310 nm].
SDH
, and then
BNC cable.
on the HP 37717C and select SIGNAL [STM-4 OPT]
SDH
on the oscilloscope and adjust the Timebase and Range to
and select TRANSMITTER AND
to start a
RUN/STOP
RESULTS