HP 37718A Installation And Verification Manual page 122

Performance Tests
External Clock/Data Reference Inputs & Clock Reference Output
11 Connect the PDH/DSn Test Set, 75
Ω
75 2M REF IN Port and Recall the DEFAULT SETTINGS as shown
on page 3-2.
12 Set the
TRANSMIT
shown opposite.
13 Select CLOCK SYNC FORMAT [2
Mb/s DATA] on the SDH
Display.
TRANSMIT
14 Press
RESULTS
then .
RUN/STOP
15 Check that the
RESULTS
reads NO TROUBLE and all the
Alarm LEDS are off. Press
to halt the measurement.
RUN/STOP
16 Disconnect the PDH/DSn Test Set, 75
Ω
75 2M REF IN Port.
17 Connect the PDH/DSn Test Set, 120
Ω
120 2M REF IN Port.
18 Change the PDH O/P termination to 120
and the HP37718A/19A.
19 Press
RESULTS
19A.
20 Check that the
RESULTS
Alarm LEDS are off. Press
STM-1/STS-3 Receive Data
21 Disconnect the PDH/DSn Test Set Data Output from the HP37718A/
Ω
19A, 120 2M REF IN port.
22 Disconnect the 52/155 Mb/s DATA OUT port from the 52/155 Mb/s
DATA IN port
23 Select CLOCK SYNC [STM-1/STS-3 RECEIVE] ON THE HP37718A/
19A display.
TRANSMIT
24 The SDH Clock Loss Alarm led should be lit on the HP37718A/19A.
25 Set the Synthesizer frequency to 77.760MHz and amplitude to
+10dBm.
3-54
Ω
display as
TROUBLE SCAN
Display
Ω
then
TROUBLE SCAN
Display reads NO TROUBLE and all the
RUN/STOP
Output to the HP37718A/19A
Ω
2 Mb/s PDH Output from the
2 Mb/s PDH Output to the
Ω
on the PDH/DSn Test Set
on the HP37718A/
RUN/STOP
to halt the measurement.