3-21
Performance Tests
PDH/DSn Transmitter Output
d/ softkey
e/ softkey
f/ softkey
g/ RUN
12 The Oscilloscope will automatically display and compare an isolated
positivepulsewith the masklimits.A PASSmessage should appearon
the Oscilloscope
NOTE It may be necessary to visibly fit the waveform to the mask by adjusting
the Oscilloscope vertical position and horizontal delay to obtain a PASS
on the Mask.
13 Measure the peak pulse amplitude at the mid pulse-width using the
Oscilloscope and verify that this is between 900 mV and 1.100 Volts.
Procedure - 8.448 Mb/s
Positive Pulse
1 Recall the HP 37718A/19A Default Settings as shown on page 3-4.
2 Set the display as shown opposite.
3 Connect the PDH/DSn 75Ω OUT port to the Oscilloscope CHAN 1,
terminate in 75Ω.
4 Select CHAN 1 on the Oscilloscope and set to 1MΩ input impedance.
TEST ON
M1M2
AFTER FAIL CONTINUE
TRANSMIT
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