HP 37717C Calibration Manual page 325

Figure 3-65
Performance Tests
STM-1/STS-3 Receiver Monitor Input (Options A1T, A1U, A3R, [A3S],
120)
STS-3 Receiver Monitor Input
4. Press until the Monitor led above the key is lit.
SIGNAL IN
5. Press and select GAIN [20 dB].
RECEIVE
6. Verify that all the front panel ALARM leds are off.
7. Press
TROUBLE SCAN
RESULTS
display indicates NO TROUBLE.
8. Press
RUN/STOP
9. Connect the second 6 dB Fixed Attenuator between the 3 dB attenuator and the
Cable Attenuator.
3-216
and
to halt the measurement.
, and check that the
RUN/STOP