Fm Off The Air Monitoring/Determining Unknown Transmitter; Carrier Frequency - HP 8920A Application Handbook

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.
SPECTRUM ANALYZER
RF IN/OUT
POWER
OFF ON
M AX POWER 60 W
!
CONTINUOUS
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Knob
SCREEN CONTROL
MSSG HELP CONFIG
RX TX DUPLEX
USER DATA FUNCTIONS
k1' REF SET
INCR
k1
: 10
k2'
LO LIM IT
k2
k3'
CURSOR CONTROL
k3
ASSIGN
k4
RELEASE
PUSH TO SELECT
k5
SHIFT CANCEL
MIC/ACC VOLUME
DUPLEX OUT ANT IN
!
M AX POWER 200 mW
1
FM Transmitters
Data Entry
Keys
INSTRUMENT STATE
HOLD PRINT ADRS SAVE
MEAS
PREV TESTS LOCAL RECALL PRESET
RESET
DATA
METER AVG
INCR INCR X10
7 8 9
ENTER
SET
HI LIMIT
dB
GHz
4 5 6
dBm
%
MHz
1 2 3
V
s
+ _ kHz
0
mV
Ω
YES NO ms
ppm % Hz
ON/OFF
µV
W dBµV
M EMORY
CARD
SQUELCH AUDIO OUT AUDIO IN
HI LO
M AX MAX
! !
12 v Pk 42 v Pk
2
53