Performance Tests
Model 8642A/B
PERFORMANCE TESTS
DESCRIPTION
All AM, FM and PM specifications are checked on a measuring receiver.
Distortion is checked by selecting the modulation mode and audio distortion
mode.
Do
D
S8
o o □□□ t
an □ □ □
J§Oo
HP
8642A/B
SYNTHESIZED
SIGNAL GENERATOR
tO
MHz
OUTPUT
RF
OUTPUT
REF
EXT
INPUT
MEASURING
RECEIVER
SENSOR
MODULE
RF
INPUT
Figure 4-5. AM, FM, and PM Test Setup
EQUIPMENT:
Measuring Receiver HP 8902A
Sensor Module HP 11722A
PROCEDURE:
Setup
1.
Connect the instruments as shown in Figure 4-5 preset the
instruments. Set the 8642's output amplitude to +10.0 dBm. Set
the measuring receiver as follows:
MEASUREMENT MODE: AM
DETECTOR: PEAK+
HP FILTER: 300 HZ
LP FILTER:
1
5 kHz
FM DE-EMPHASIS: OFF
2.
AM Indicator Accuracy
Set the HP 8642 AM to 90%. Set the HP 8642 frequency to the
values in the table below, and verify that the measuring receiver
readings are within the specified limits.
HP 8642
FREQ
(MHz)
0.15
5.00
1050
1
13002
AM
(%)
90
90
90
90
Results
Min.
85.8%
85.8%
84.5%
84.5%
Actual Max.
94.2%
94.2%
95.5%
95.5%
1
HP 8642A only.
2
HP 8642B only.
4-20
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