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FM Transmitters
74
FM Audio Distortion Measurement
Description
This procedure is used to measure an FM Transmitter’s audio frequency
harmonic distortion level. FM reference is
ANSI/EIA-RS-152-C, RS-316-B.
DUPLEXTXRX PREV TESTS
CON FIGHELPMSSG HOLD PRINT
SCREEN CONTROL
LOCAL
ADRS
REC AL L
SA VE
MEAS
RES ET
PRESET
INSTRUMENT STATE
DATA FUNCTIONS
INCR
: 10
REF SET
IN CR
SET
METER
INCR X10
AVG
LO LIMIT HI LIMIT
CURSOR CONTROL
PUSH TO SELECT
CA NCEL
SHIFT
k1
k1’
k2
k2’
k3
k3’
k4
ASSIGN
k5
RELEASE
USER DATA
789
456
123
0
+
_
ENTER
GHz
dBm
dB
MHz
V
%
kHz
mV
s
Hz
µV
ms
%
dBµV
Ω
ppm
W
NO
ON/OFF
YES
MEMORY
CARD
AUDIO IN
LOHI
!
MAX
42 v Pk
!
MAX
12 v P k
AUDIO OUTSQUELCHVOLUMEMIC/ACC
MA X POWER 20 0 mW
!
ANT IN
DUPLEX OUTRF IN/OUT
!
MA X POWER 60 W
CONTINUOUS
POWER
OFF ON
1
2
Knob
TX TEST
50Ω COXIAL
CABLE
ATTENUATOR (OPTIONAL)
TRANSMITTER UNDER TEST
ANTENNA
(RF OUT)
MICROPHONE
(AUDIO INPUT)
SHEILDED
AUDIO CABLE
3
Keys
Data Entry