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FM Receivers
111
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.
DUPLEXTXRX PREV TESTS
CONFIGHELPMSSG HOLD PRINT
SCREEN CONTROL
LOCAL
ADRS
RECALL
SAVE
MEAS
RESET
PRESET
INSTRUMENT STATE
DATA FUNCTIONS
INCR
: 10
REF SET
INCR
SET
METER
INCR X10
AVG
LO LIMIT HI LIMIT
CURSOR CONTROL
PUSH TO SELECT
CANC EL
SHIFT
k1
k1’
k2
k2’
k3
k3’
k4
A SSIG N
k5
RELEASE
USER DATA
789
456
123
0
+
_
ENTER
GHz
dB m
dB
MHz
V
%
kHz
mV
s
Hz
µV
ms
%
dBµV
Ω
ppm
W
NO
ON/OFF
YES
MEM ORY
CARD
AUDIO IN
LOHI
!
MAX
42 v Pk
!
MAX
12 v Pk
AUDIO OUTSQUELCHVOLUMEMIC/ACC
MAX POWER 200 mW
!
ANT INDUPLEX OUTRF IN /OUT
!
MAX PO WER 60 W
CONTINUOUS
POWER
OFF ON
1
2
Data Entry
RX TEST
50Ω
COX-
IAL
COMBINER
RECEIVER UNDER TEST
ANTENNA (RF INPUT)
SPEAKER
(AUDIO
OUTPUT)
SHEILDED
ADUIO
CABLE
3
TO SIGNAL
GENERATOR’S
RF OUTPUT
1
Knob
Keys