HP 37718A Installation And Verification Manual page 112

Performance Tests
STM-1/STS-3 Transmitter Output Waveshape
3 Press
OTHER
CALIBRATION
1243. Set up the display as shown opposite.
4 Connect the 52/155 Mb/s 75Ω DATA OUT port to the Oscilloscope,
terminate in 75Ω.
5 Select CHAN on the Oscilloscope and set to 1MΩ input impedance.
Load the Telecom Mask
6 On the Oscilloscope, use the following key sequence to select and load
the required Telecom Mask:
a/ SHIFT (Blue Key) APPLICATION.
b/
TELECOM MASK/MASK
c/ Use ENTRY/MEASURE control to select 155BIN1 in the
highlighted MSK FILES window.
d/
LOAD SETUP 8 M1M2
Compare Pulse with Mask
7 On the Oscilloscope, use the following key sequence to compare the
pulse with the mask:
a/ RECALL 8, (Ensure CH1 Impedance is reset to 1M
c/ softkey
COMPARE
d/ softkey
TEST ON
e/ softkey
M1M2
f/
AFTER FAIL CONTINUE
g/ RUN
3-72
and enter the calibration password -
softkey.
softkey.
softkey
Ω
)