HP 37718A Installation And Verification Manual page 109

N OT E
Performance Tests
STM-0/STS-1 Transmitter Output Waveshape
It may be necessary to select
visibly fit the waveform to the mask by adjusting the Oscilloscope vertical
gain/position and horizontal delay to obtain a PASS on the Mask.
12 Measure the peak pulse amplitude at the mid pulse-width using the
Oscilloscope and verify that this is nominally 530 mV.
13 Change the signal to STM-0/STS-1 HIGH and check that the +ve and
-ve pulses are nominally 1 V.
14 Change the signal to STM-0/STS-1 LOW and check that the +ve and -
ve pulses max) peaks are nominally 300 mV.
and
MASK MASK AUTO MASK ALIGN
to
/
3-69