HP 37717C Calibration Manual page 139

N OTE
Figure 3-18
Performance Tests
Multiple PDH Transmitter Outputs (Options UHC, [US6])
66. Select the 34Mb/s G703 Mask on the oscilloscope and store it on the Display.
67. Press SHIFT
AUTOSCALE
to the mask. Verify that the pulse falls within the mask as shown in Figure 3-18.
If your oscilloscope does not have the Mask feature, obtain a printout of the displayed
pulse. Place the mask shown in Figure 3-18 over the pulse and ensure that the pulse
falls within the mask (a transparent copy of the mask should be used).
34 Mb/s Pulse Mask
68. Repeat steps 64 to 67 with the Oscilloscope Channel 1 connected to SIGNAL
OUT 3 and SIGNAL OUT 4 in turn.
69. Press
AUTOSCALE
following sequence to display the isolated negative pulse:
Select menu.
TRIG
Set trigger level to middle of negative pulse.
Set Trigger to P
ATTERN
Set Sequence to H X X.
70. Use the oscilloscope
mask on the oscilloscope.
3-30
on the oscilloscope to automatically align the pulse
on the oscilloscope to display the full waveform and use the
.
function to display an inverted pulse
STORE INVERT