3-26
Performance Tests
Multiple PDH Transmitter Outputs (Options UHC, [US6])
Figure 3-16 2 Mb/s Pulse Mask
24. Repeat steps 20 to 23 with the Oscilloscope Channel 1 connected to SIGNAL
OUT 3 and SIGNAL OUT 4 in turn.
25. Press on the oscilloscope to display the full waveform and use the
following sequence to display the isolated negative pulse:
Select menu.
Set trigger level to middle of negative pulse.
Set Trigger to PATTERN.
Set Sequence toHXX.
26. Use the oscilloscope function to display an inverted pulse
mask on the oscilloscope.
27. Adjust the oscilloscope timebase, delay and vertical sensitivity controls to verify
that the pulse meets the mask as shown in Figure 3-16. Use the displayed settings as
a guide.
28. Measure the peak pulse amplitude at mid-pulse-width using the Oscilloscope and
verify that this is between 2.133V and 2.607V.
29. Repeat steps 27 and 28 with the Oscilloscope Channel 1 connected to SIGNAL
OUT 2 and SIGNAL OUT 3 in turn.
AUTOSCALE
TRIG
STORE INVERT
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