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3-10 Pulse Modulation Tests
Chapter 3 — Performance Verification
3-40
PN: 10370-10372 Rev. B
MG3702xA MM
g.
Connect a fixed attenuator with the proper attenuation value to the MG3702xA
RF Output
(refer to
), then connect the RF coaxial cable from the
Channel 1
input of the
oscilloscope to the fixed attenuator.
h.
Turn RF output ON.
i.
Press
Modulation
| External
to select the External Pulse Status menu.
j.
Ensure that the polarity is set to High RF.
k.
Press
Off
to turn the external pulse off.
2.
Set up the oscilloscope as follows:
a.
Press the
Source
button (near the trigger) until Free Run is illuminated.
b.
Select the
Scale
button at the lower left corner of the display and set the scale to 20 mV/div.
c.
Set the Offset so that the trace is centered on the display (typically 150 mV), and select
Close
.
d.
Select the
Amplitude
button, then the Vavg button (on the left hand side of the display) and
press
OK
to close.
3.
Read the measured result on the display and record the result as V
ref
in the test record.
4.
On the MG3702xA, press
On
to turn pulse modulation on
5.
On the oscilloscope, press the
Source
button (near the trigger) until Left Module is illuminated.
6.
Set up the oscilloscope as follows:
a.
Select
Time Delay
and
Scale
so that only the positive peak portion of the pulse fills the
display (typically set the scale to 90 ns/div and the delay time to 4.100µs). Press
Close
to
close the window.
b.
Press the
Clear Display
key. Allow the oscilloscope to sample the signal and wait for a
clearly defined waveform to appear on the display.
c.
Read the measured result of Vavg on the display.
7.
Record the result as V
pulse
in the test record.
8.
Calculate the difference of the two voltages using the following equation, then record the result in
the test record as P
accuracy
.
9.
for each frequency listed in the test record.
Table 3-6.
MG3702xA Attenuation
MG3702xA Rated Power
Required Attenuation
17 dBm
20 dB
13 dBm
10 dB
10 dBm
6 dB
8 dBm
3 dB
< 8 dBm
0 dB
Note
Use the scroll bar to locate the Vavg button.
P
accuracy
20
V
pulse
V
ref
----------------
log
=
Содержание MG3702xA Series
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Страница 8: ...TG 8 PN 10370 10372 Rev B MG3702xA MM ...
Страница 24: ...1 12 Test Equipment List Chapter 1 General Information 1 10 PN 10370 10372 Rev B MG3702xA MM ...
Страница 42: ...2 5 RF Deck Assemblies Chapter 2 Functional Description 2 18 PN 10370 10372 Rev B MG3702xA MM ...
Страница 120: ...5 5 Troubleshooting Tables Chapter 5 Troubleshooting 5 24 PN 10370 10372 Rev B MG3702xA MM ...
Страница 144: ...6 13 RF Components Chapter 6 Removal and Replacement Procedures 6 24 PN 10370 10372 Rev B MG3702xA MM ...
Страница 178: ...B 1 MG3702xA Technical Data Sheet Appendix B Performance Specifications B 2 PN 10370 10372 Rev B MG3702xA MM ...
Страница 182: ...Index 4 PN 10370 10372 Rev B MG3702xA MM ...
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