3-26
Performance Tests
PDH/DSn Transmitter Output
the Oscilloscope.
NOTE It may be necessary to visibly fit the waveform to the mask by adjusting
the Oscilloscope vertical position and horizontal delay to obtain a PASS
on the Mask.
13 Measure the peak pulse amplitude at the mid pulse-width using the
Oscilloscope and verify that this is between 2.133V and 2.607 Volts.
Procedure - DSX-3
Positive Pulse
1 Recall the HP 37718A/19A Default Settings as shown on page 3-4.
2 Set the display as shown below.
3 Connect the PDH/DSn 75Ω OUT port to the Oscilloscope CHAN 1,
terminate in 75Ω.
4 Select CHAN 1 on the Oscilloscope and set to 1MΩ input impedance.
Load the Telecom Mask
5 On the Oscilloscope, use the following key sequence to select and load
the required Telecom Mask:
a/ SHIFT (Blue Key) APPLICATION.
TRANSMIT
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