3-61
Performance Tests
External Clock/Data Reference Inputs & Clock Reference Output
5 Connect the HP 3335A to the HP 37718A/19A 75Ω 2MREF IN port on
the Clock module.
6 Press ; .
7 Press , check that the display reads NO TROUBLE and all
the Alarm leds are off.
8 Press to halt the measurement.
Clock REF OUT
9 Connect the Clock REF Out port to the Frequency Counter and check
that a 2.048MHz signal is present.
MTS Clock - Data
10 Disconnect the HP 3335A Synthesizer from the HP 37718A/19A 75Ω
2M REF IN port.
11 Set the PDH/DSn Test Set to transmit a 2 Mb/s unframed signal.
12 Connect the PDH/DSn Test Set, 75Ω Output to the HP 37718A/19A
75Ω 2M REF IN Port and Recall the DEFAULT SETTINGS as shown
on page 3-4.
13 Set the display as shown below.
14 Select CLOCK SYNC FORMAT [2 Mb/s DATA] on the SDH
Display.
15 Press then .
RESULTS
TROUBLE
SCAN
RUN/STOP
RUN/STOP
TRANSMIT
TRANSMIT
RESULTS
TROUBLE SCAN
RUN/STOP
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