HP 37718A Installation And Verification Manual page 110
Communications performance analyzer
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Also See for 37718A:
- User manual (190 pages) ,
- Installation and verification manual (202 pages)
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N OTE
Performance Tests
External Mux/Demux
12 Select CHAN 1 on the oscilloscope and set to 1MΩ input impedance.
Load the Telecom Mask
13 On the oscilloscope, use the following key sequence to select and load
the required Telecom Mask:
a/ SHIFT (Blue Key) APPLICATION.
b/
TELECOM MASK/MASK
c/ Use ENTRY/MEASURE control to select DS_1E in the highlighted
MSK FILES window.
d/
LOAD SETUP 8 M1M2
Compare Pulse with Mask
14 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
15 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 visibly fit the waveform to the mask by adjusting
the oscilloscope vertical position and horizontal delay to obtain a PASS on
the Mask.
16 Measure the peak pulse amplitude at the mid pulse-width using the
oscilloscope and verify that this is between 2.133V and 2.607 Volts.
2.048 Mb/s Negative Pulse
17 On the Oscilloscope, use the following key sequence to access the
inverted mask.
a/ SHIFT (Blue Key) DISK
b/
softkey
DIRECTORY
c/ Use ENTRY/MEASURE control to highlight INV_MASK
d/
CHANGE DIRECTORY
3-42
softkey.
softkey.
softkey
softkey
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