Anritsu MG3702xA Series, Maintenance Manual

Page: 80 / 184

3-10 Pulse Modulation Tests Chapter 3 — Performance Verification
3-38 PN: 10370-10372 Rev. B MG3702xA MM
b. 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 4.1 µs for a 1 µs pulse or set
the scale to 40 µs/div and the delay time to 4.1 µs for a 500 µs pulse). Press
Close
to close the
window.
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, and then record the result
in the test record as P
accuracy
.
9. Repeat Step 1 : Step b through Step 8 for each frequency listed in the test record.
10. For models with internal pulse, repeat step Step 2 : Step b through Step 8 using a pulse width of 0.5
µs.
External Pulse Power Accuracy
The following procedure ensures the external pulse input to the MG3702xA is operational. The external pulse
power accuracy is tested with a 1 µs and a 0.5 µs pulse width.
Test Setup
Connect the equipment shown in Figure 3-14 , as follows:
1. Disconnect the MG3702xA's RF coaxial cable from the front of the unit. Set up the equipment as
shown in
Figure 3-14 .
Figure 3-14. External pulse verification setup
P
accuracy
20
V
pulse
V
ref
----------------
 
 
log

=
MG37022A
Signal
Generator
Standby Operate
Function Generator
Sync
Output
The function generator is only required if the MG37022A does not have Options 24 or 27.
To PULSE
TRIG IN
MG3702xA
Connect the proper value attenuator to the MG3702xA output as specified in the procedure.
6 dB
Attenuators
Attenuator
*
*
**
**
Agilent 86100A
Oscilloscope