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FM Transmitters
53
FM Off The Air Monitoring/Determining Unknown Transmitter Carrier Fre-
quency
Description
This procedure is used to locate, demodulate, and measure an FM
signal’s output carrier frequency. The low level signal is input to the
front-panel ANT IN connector, located, then demodulated using the
spectrum analyzer function.
NOTE: For performing an FM Off the Air Monitoring on a Known Transmitter
Carrier Frequency, see page 55.
If attempting to determine the unknown frequency of a Transmitter connected
to the RF IN/OUT connector, see “Output Power, Deviation, and Frequency
or Frequency Error Measurement” provided later in this chapter for the
measurement procedure.
DUPLEXTXRX PREV TESTS
CON FIGHELPMSSG HOLD PRINT
SCREEN CONTROL
LOCAL
ADRS
REC AL L
SA VE
MEAS
RESET
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
CAN CEL
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 Pk
AUDIO OUTSQUELCHVOLUMEMIC/ACC
MA X POWER 200 mW
!
ANT INDUPLEX OUTRF IN/OUT
!
MA X POWER 60 W
CONTINUOUS
POWER
OFF ON
1
2
Knob
SPECTRUM ANALYZER
Data Entry
Keys