HP 37717C Calibration Manual page 129

Figure 3-12
N OTE
Performance Tests
PDH Transmitter Output (UKK, [USB], UKJ, [USA]
140 Mb/s All Ones Pulse
41. Select PATTERN [ALL ZEROS] on the
42. Select BIN0 140 Mb/s G.703 mask on the oscilloscope and store it on the display.
43. Adjust the Oscilloscope Delay to position the positive peak pulse amplitude at
mid-pulse-width point in the centre of the screen.
44. Measure the peak pulse amplitude at mid-pulse-width using the Oscilloscope and
verify that this is between 0.900V and 1.100V.
45. Press SHIFT
AUTOSCALE
to the mask. Verify that the pulse falls within the mask as shown in Figure 3-14.
If your oscilloscope does not have the Mask feature, obtain a printout of the displayed
pulse. Place the mask, shown in Figure 3-13, over the pulse and ensure that the pulse
falls within the mask. (A transparent copy of the mask should be used).
3-20
TRANSMIT
on the oscilloscope to automatically align the pulse
display.