16 pulse modulation test: rf on/off ratio 3-45, Test setup 3-45, Test procedure 3-45 – Anritsu 682XXB User Manual
Page 105: Pulse modulation test: rf on/rf off ratio, 3-45, Pulse modulation test: rf on/off ratio 3-45, Test setup -45 test procedure -45, Spectrum analyzer
3-16
PULSE MODULATION
TEST: RF ON/OFF
RATIO
This pulse modulation test verifies that the ratio of RF on power to RF
off power is within specifications.
Test Setup
Connect the equipment, shown in Figure 3-13, as
follows:
1. Connect the 682XXB/683XXB rear panel
10 MHZ
REF OUT
to the Spectrum Analyzer External Ref-
erence Input.
2. Connect the
RF OUTPUT
of the 682XXB/683XXB
to the Spectrum Analyzer RF Input.
Test
Procedure
The following procedure lets you determine the ratio
of RF on power to RF off power during pulse modu-
lation.
1. Set up the 682XXB/683XXB as follows:
a. Reset the instrument by pressing
SYSTEM
,
then
Reset
. Upon reset, the CW Menu is dis-
played.
b. Press
Edit F1
to open the current frequency
parameter for editing.
c. Set F1 to the frequency noted on the Test Re-
cord.
d. Press
MODULATION
, then
Pulse
. The Inter-
nal Pulse Status menu is displayed.
682XXB/683XXB MM
3-45
PERFORMANCE
PULSE MODULATION TEST:
VERIFICATION
RF ON/OFF RATIO
10 MHz
REF OUT
682XXB / 683XXB
EXT REF
INPUT
RF OUT
Spectrum Analyzer
RF IN
Figure 3-13.
Equipment Setup for Pulse Modulation Test: RF On/Off Ratio