Negative Pulse; Dsx-1 Negative Pulse - HP 37717C Calibration Manual

N OTE
Performance Tests
ETSI/ANSI Transmitter Output Level and Waveshape (Option UKZ)
6. Select CHANNEL 1 on the oscilloscope and select PROBE 2.45 (attenuation
level to compensate for the 75/50 ohm converter).
7. If using the HP 54503A oscilloscope, use the following key sequence to select
and store the correct Telecom Mask.
a. DEFINE MEAS key.
b. COMPARE softkey.
c. TEST ON softkey.
d. WFORM SAVE key.
e. MASK DS1 new 1.5 Mb ANSI T1.102 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 the isolated positive
pulse from the HP 37717C with the limits in the selected Telecom Mask.
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 1.984V and 2.976V.

DSX-1 Negative Pulse

1. Select the HP 37717C TRANSMIT
page, select ATM LAYER and set as
follows;
3-188