Anritsu MG3702xA Series, Руководство по обслуживанию

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3-10 Pulse Modulation Tests Chapter 3 — Performance Verification
3-36 PN: 10370-10372 Rev. B MG3702xA MM
e. Set the scale and offset voltages so that the positive peak of the pulse is centered and the
amplitude is optimally displayed (typically a scale of 20mV/div and offset of 50 mV). Select
Close
to close the window.
f. Select the
Rise Time
button (on the left hand side of the display).
3. Read the measured result from the bottom of the display and enter the result in the test record.
Pulse Fall Time
4. Set up the oscilloscope as follows:
a. Select the
Time/Delay
button on the bottom of the display.
b. Set the delay time to 5 µs. Select
Close
to close the window.
c. Press the
Clear Display
key. Allow the oscilloscope to sample the signal and wait for a
clearly defined waveform to appear on the display.
d. Select the
Fall Time
button (on the left hand side of the display).
5. Read the measured result from the bottom of the display and enter the result in the test record.
6. Repeat pulse rise and fall time measurements for all frequencies listed by repeating Step 1b
through Step 5 .
Overshoot
7. On the oscilloscope, select
Setup & Info
on bottom right of screen then put the cursor on top of
Rise
Time
and select
Remove
.
8. On oscilloscope, select
Setup & Info
on bottom right of screen then put the cursor on top of
Fall Time
and select
Remove
.
9. Set up the MG3702xA as follows:
a. Turn RF output off.
b. Press
Edit Frequency
to open the current frequency parameter for editing.
c. Set F0 to the first/next applicable frequency in the test record.
d. Press
Edit Level
to open the current power level parameter for editing.
e. Set L0 to the maximum specified leveled output power level for the frequency and
instrument being tested (refer to
Appendix B , “MG3702xA Technical Data Sheet” ).
f. Connect a fixed attenuator with the proper attenuation value to the MG3702xA RF Output
(refer to
Table 3-5 on page 3-35 ), then connect the RF coaxial cable from the Channel 1 input
of the oscilloscope to the fixed attenuator.
l. Turn RF output ON.
10. Set up the oscilloscope as follows:
a. Select the Time/Delay button on the bottom of the display.
b. Set the scale to 120 ns/div and the trigger to 4 µs. Select Close to close the window.
c. Press the Clear Display key. Allow the oscilloscope to sample the signal and wait for a
clearly defined waveform to appear on the display.
d. Select the Amplitude button, then the Overshoot button (on the left hand side of the
display).
11. Read the measured result from the bottom of the display and record the result in the test record.
12. Repeat the overshoot test from Step 9 through Step 11 for each frequency listed in the test record.