HP 37717C Calibration Manual page 231

Performance Tests
STM-1/STM-4 Optical Interface (Options 130, 131)
f. Using ,
g. Press key to display CAL.
PARAM
h. Using ,
i. Cover the end of the Power Meter Optical Input connector with a protective cap.
j. Press the key on the Power Meter to calibrate - the Power Meter is now
ZERO
ready.
43. Switch on the HP 37717C and check that immediately on power-up the Optical
Module LASER ON led illuminates for a few seconds.
44. Press
TRANSMIT
and set up the display as shown opposite.
45. Verify that the Optical Module LASER
ON led is lit indicating that the laser is
enabled.
46. Adjust the level to obtain a reading of
-8dBm 1dB on the Power Meter.
Typically around 7dB of attenuation will be
required to achieve this reading.
47. Recall the HP 37717C DEFAULT SETTINGS as shown on 3-2.
48. Verify that the Optical Module LASER ON led is NOT lit indicating that the laser
is disabled before continuing.
49. Disconnect the optical cable from the Power Meter and connect to the HP 37717C
Optical IN Port.
50. Press on the HP 37717C
RECEIVE
and set up the display as shown opposite.
51. Press
TRANSMIT
and select SIGNAL [STM-4 OPT] [1550
nm].
52. Press
TROUBLE SCAN
RESULTS
then to start the measurement.
RUN/STOP
53. After 5 minutes, check that NO
TROUBLE is displayed on the HP 37717C
display.Press
RESULTS
stop the measurement.
3-122
and keys, set the REF to 0.000dBm.
and keys, set the CAL to 0.000dBm.
on the HP 37717C
on the HP 37717C
to
RUN/STOP