HP 37717C, Calibration Manual, Page: 290 / 399

3-181
Performance Tests
ETSI/ANSI Transmitter Output Level and Waveshape (Option UKZ)
e. MASK CCITT G703 34Mb softkey.
f. STORE to M1 + M2 softkey.
g. STORE softkey.
8. Press the SHIFT key on the oscilloscope (colored blue), then MASK AUTO key
then 1 key.
The oscilloscope will now automatically display and compare an isolated positive
pulse from the HP 37717C with the limits in the selected Telecom Mask. A PASS
message should appear on the oscilloscope display when completed.
N OT E It may be necessary to visibly check the waveform fits the mask and manually adjust
amplitude and offset parameters on the oscilloscope to obtain a PASS on the Mask.
9. Measure the peak pulse amplitude at the mid pulse-width using the oscilloscope
and verify that this is between 900 mV and 1.100 Volts.
34.368 Mb/s Negative Pulse
1. Select the HP 37717C TRANSMIT
page, select ATM LAYER and set as
follows;
2. Select CHAN on the oscilloscope and set OFFSET to -500mV.
3. Select TRIG on the oscilloscope and set to PATTERN H X X X.
4. Select TIMEBASE on the Oscilloscope and set DELAY to 8nS. Adjust the delay
manually until the negative pulse is centred on the oscilloscope display.
5. If using the HP 54503A oscilloscope, use the following key sequence to select
and store the correct Telecom Mask.
a. WFORM SAVE key.
b. MASK CCITT G703 34Mb softkey.