HP 37717C Calibration Manual page 142

N OT E
Figure 3-20
Performance Tests
Multiple PDH Transmitter Outputs (Options UHC, [US6])
91. Select PATTERN [ALL ZEROS] on the
92. Select the BIN 0 140Mb/s G703 Mask on the oscilloscope and store it on the
Display.
93. Adjust the Oscilloscope Timebase and Delay to position the positive peak pulse
amplitude at mid-pulse-width point in the centre of the screen.
94. Measure the peak pulse amplitude at mid-pulse-width using the Oscilloscope and
verify that this is between 0.900V and 1.100V.
95. Press SHIFT
AUTOSCALE
to the mask. Verify that the pulse falls within the mask as shown in Figure 3-20.
If your oscilloscope does not have the Mask feature, obtain a printout of the displayed
pulse. Place the mask shown in Figure 3-20 over the pulse and ensure that the pulse
falls within the mask (a transparent copy of the mask should be used).
140 Mb/s Pulse Mask All 0's
96. Repeat steps 93 to 95 with the Oscilloscope Channel 1 connected to SIGNAL
OUT 2 and SIGNAL OUT 3 in turn.
TRANSMIT
on the oscilloscope to automatically align the pulse
display.
3-33