HP 37717C Calibration Manual
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Brand: HP
Category: Measuring Instruments , Test Equipment
Type: Calibration manual for HP 37717C
Pages: 399
3-116
Performance Tests
STM-1/STM-4 Optical Interface (Options UKT, USN)
67. Press on the HP 37717C and select SIGNAL [STM-4 OPT]
[1550 nm].
68. Press on the oscilloscope and adjust the Timebase and Range to
obtain an STM-4 waveform.
69. Measure the amplitude of this STM-4 waveform using the oscilloscope and adjust
the Optical Attenuator until the amplitude is 150mV pk-pk.
NOTE If the input power is greater than -8 dBm then the Optical/Electrical converter is liable
to saturate.
70. Disconnect the output of the O/E Converter from the oscilloscope and connect
instead to the HP 37717C STM1/4 Optical Module Monitor Input.
71. Press on the HP 37717C
and set up the display as shown opposite.
72. Press
then to start the measurement.
73. After 5 minutes, check that NO
TROUBLE is displayed on the HP 37717C
display. Press to
stop the measurement.
74. Recall the HP 37717C DEFAULT SETTINGS as shown on 3-2.
75. Verify that the Optical Module LASER ON led is NOT lit indicating that the laser
is disabled before continuing.
76. Repeat steps 62 through 75, selecting SIGNAL [STM-1 OPT] [1550 nm] in step
67 and [STM-1 MON] in step 71.
77. Disconnect all the test equipment.
TRANSMIT
SDH
AUTOSCALE
RECEIVE
RESULTS
TROUBLE SCAN
RUN/STOP
RESULTS
RUN/STOP