Fm Spurious Response Attenuation Measurement - HP 8920A Application Handbook

FM Spurious Response Attenuation Measurement

Description
This procedure is used to measure an FM Receiver's spurious response
attenuation (the receiver's ability to prevent unwanted signals from
causing response in the audio output). A reference is established, and
high level modulated signals from 1 MHz to 1000 MHz (or as required)
are input to the Receiver while audio output response is measured. FM
reference is ANSI/EIA/TIA-204D.
RF IN/OUT
POWER
OFF ON
MAX POWER 60 W
!
CONTINUOUS
COMBINER
50Ω
COX-
IAL
TO SIGNAL
1
GENERATOR'S
RF OUTPUT
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3
MSSG HELP
RX TEST
RX TX
USER
k1' REF SET
k1
k2' LO LIMIT
k2
k3'
k3
ASSIGN
k4
RELEASE
k5
SHIFT CANCEL
MIC/ACC
DUPLEX OUT ANT IN
!
MAX POWER 200 mW
1
RECEIVER UNDER TEST
ANTENNA (RF INPUT)
Knob Data Entry
Keys
SCREEN CONTROL INSTRUMENT STATE
CONFIG HOLD PRINT ADRS SAVE
MEAS
DUPLEX PREV TESTS LOCAL RECALL PRESET
RESET
DATA FUNCTIONS DATA
METER AVG
INCR INCR INCR X10
7 8 9
ENTER
: 10 SET
HI LIMIT
dB
GHz
4 5 6
dBm
CURSOR CONTROL
%
MHz
1 2 3
V
s
+ _ kHz
0
mV
PUSH TO SELECT
Ω
YES NO ms
ppm % Hz
ON/OFF
µV
W dBµV
MEM ORY
CARD
VOLUME SQUELCH AUDIO OUT AUDIO IN
HI
MAX MAX
! !
12 v Pk 42 v Pk
SHEILDED
ADUIO
CABLE
SPEAKER
(AUDIO
OUTPUT)
FM Receivers
2
LO
111