3-175
Performance Tests
PDH Binary Interfaces (Option UH3, [US7])
6. Select SIGNAL [8 Mb/s] and repeat 3 and 4 with the Signal Generator frequency
set to 7.6 MHz and 9.29 MHz in turn.
7. Select SIGNAL [34 Mb/s] and repeat 3 and 4 with the Signal Generator
frequency set to 30.93 MHz and 37.8 MHz in turn.
8. Press
and set up the display as
shown opposite.
9. Press
and set up the display as shown opposite.
10. Set the Signal Generator to Frequency-
125.3 MHz, Output Level - 500 mV and
connect to the EXT CLOCK input port of
the binary interfaces module.
11. Connect the HP 37717C binary
CLOCK O/P to the oscilloscope via the
75Ω/50Ω matching pad and the ECL
termination and check that the mark/space
ratio of the displayed clock waveform is
between 60/40 and 40/60.
12. Repeat steps 10 and 11 with the Signal Generator frequency set to 153.2 MHz
TRANSMIT
PDH MAIN
SETTINGS
TRANSMIT
PDH
BINARY
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