HP 8642A Operation And Calibration Manual page 264

Performance Tests Model 8642A/B
PERFORMANCE TESTS
4-7. PULSE ON/OFF RA TID TEST
SPECIFICATION:
DESCRIPTION:
EQUIPMENT:
PROCEDURE:
4-14
Electrical Characteristics Performance Limits
Conditions
On/Off Ratio
>
40 dB band HET-9
>
80 dB band 10
Pulse On/Off Ratio is measured by using the measuring receiver to measure
the power output of the HP 8642 without modulation and in Pulse mode
with no modulating signal. The ratio is measured at worst case frequencies
for the HP 8642.
D tl 0
I
I
0
~3r~~f REF EXT
INPUT
MEASURING
o
8
8 DO 00000 0 0 8 0 RECEIVER
00 ODD
§§ §§§§§
0
0
HP 8642A1B
RF
f F
OUTPUT
INPUT
SYNTHESIZED
I SENSOR
I
SIGNAL GENERATOR
I MODULE I
Figure 4- 3. Pulse Test Setup
Measuring Receiver ................... HP 8902A
Sensor Module ......................... HP 11722A
lao Setup
Connect the instruments as shown in Figure 4-3. Preset the
instruments. Set the measuring receiver to tuned RF Level mode. If
the Level Accuracy Performance Test has just been done with the
same measuring receiver then continue with step 2.
If Level
Accuracy has not yet been done or you have changed measuring
receivers then calibration is required. In this case, complete step 1 b
before continuing with step
2.
rev.12DEC86