External Clock Mark To Space Ratio - HP 37717C Calibration Manual

Performance Tests
PDH Binary Interfaces (Option UH3, [US7])
14. Select Frequency - 50 MHz on the Digital Transmission Analyzer and check that
the HP 37717C Pattern Loss and Signal Loss indicators are not lit.
15. Select the following parameters on the Signal Generator: Frequency - 50 MHz
Output Level - 500 mV
16. Disconnect the Digital Transmission Analyzer and connect the Signal Generator
to the HP 37717C EXT CLOCK INPUT.
17. Press
PDH BINARY
TRANSMIT
and set up the display as shown opposite.
Check that the HP 37717C Pattern Loss
and Signal Loss indicators are not lit.
Select THRESHOLDS EXT CLOCK
[GND] and check that the HP 37717C
Pattern Loss and Signal Loss indicators are
not lit.

External Clock Mark to Space Ratio

1. Recall the HP 37717C DEFAULT SETTINGS as shown on 3-2.
2. Connect up the equipment as shown in Figure 3-56.
Figure 3-56
Mark to Space Ratio
3-172