3-31
Performance Tests
PDH/DSn Transmitter Output
c/ softkey
d/ softkey
e/ softkey
f/ softkey
g/ RUN
NOTE 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
(highlightedonthe softkeydisplay).ReducedVolts/Division= highlighted
value/1.266. The new value can be entered using the keypad
13 TheOscilloscopewillcomparethenegativepulsewiththemasklimits.
A PASS message should appear on 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.
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 signal to LOW and check that the peak pulse
amplitude reduces by approximately 20% and pulse shape has slower
rise/fall edges.
16 Disconnect all the test equipment.
COMPARE
TEST ON
M1M2
AFTER FAIL CONTINUE
TRANSMIT
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