Procedure - Dsx-1 - HP 37718A Installation And Verification Manual

N OTE
Performance Tests
PDH/DSn Transmitter Output
c/ Use ENTRY/MEASURE control to select DS3_92 in the highlighted
MSK FILES window.
d/
LOAD SETUP 8 M1M2
Compare Pulse with Mask
11 On the Oscilloscope, use the following key sequence to compare the
pulse with the mask:
a/ RECALL 8
b/ DEFINE MEAS
c/ softkey
COMPARE
d/ softkey
TEST ON
e/ softkey
M1M2
f/
AFTER FAIL CONTINUE
g/ RUN
12 The Oscilloscope will automatically display and compare an isolated
positive pulse with the mask limits. A PASS message should appear on
the Oscilloscope.
It may be necessary to select
visibly fit the waveform to the mask by adjusting the Oscilloscope vertical
gain/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 nominally 560 mV.
14 Set the
TRANSMIT
amplitude is approximately 0.9V.
15 Set the
TRANSMIT
amplitude is approximately 0.3V.

Procedure - DSX-1

Positive Pulse
1 Recall the HP 37718A/19A Default Settings as shown on page 3-4.
2 Connect the DSn 100Ω OUT port to the Oscilloscope via the HP
15508B Balanced to unbalanced Converter and terminate in 75Ω at
the Oscilloscope input.
3 Select the Transmitter Output page.
3-28
softkey.
softkey
and
MASK
signal to HIGH and check that the peak pulse
signal to LOW and check that the peak pulse
MASK AUTO MASK ALIGN
/
to