HP 37718A Installation And Verification Manual page 96
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
N OTE
Performance Tests
PDH/DSn Transmitter Output
Using the balanced to unbalanced converter reduces the pulse amplitude
by a factor of 1.266. This will cause the comparison with the mask to fail.
To overcome this select CHAN 1 ON and reduce the Volts/Division setting
(highlighted on the softkey display). Reduced Volts/Division = highlighted
value/1.266. The new value can be entered using the keypad
13 The oscilloscope will compare the negative 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.
14 Measure the peak pulse amplitude at the mid pulse-width using the
oscilloscope and verify that this is between 1.896V and 2.844V.
15 Set the
TRANSMIT
amplitude reduces by approximately 20% and pulse shape has slower
rise/fall edges.
16 Disconnect all the test equipment.
3-28
signal to LOW and check that the peak pulse
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