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3-210

Performance Tests

STS-3 Transmitter Output Waveshape (Option 120)

2. Press and set up the

display as shown opposite.

3. Make the following key sequence on

the HP 37717C to obtain the special

display.

Press ; ; ; ;

;; ; .

Press until

appears in the softkey menu.

Press and set up the

display as shown opposite.

CAUTION When using the display, ONLY modify the STM-1 TEST

PATTERN. Altering other parameters can damage instrument ﬁrmware - exit this

display after setup to eliminate any possibility of accidental modiﬁcation.

4. Adjust the Oscilloscope controls to display the waveform as shown in

Figure 3-59, STS-3 All Ones Pattern.

5. Use the Oscilloscope PRINT function to obtain a printout of the STS-3 waveform

on the external printer.

6. Ensure this printout ﬁts the STS-3 Mask of Figure 3-60.

NOTE If a mylar mask is not available, the ﬁgure shown may be traced or photocopied onto

a transparency.

TRANSMIT

MODULE DEBUG

OTHER

MODULE DEBUG

HP 37717C Calibration Manual

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