Fm Audio Distortion Measurement - HP 8920A Application Handbook

FM Transmitters

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.
TX TEST
RF IN/OUT
POWER
OFF ON
M AX POWER 60 W
!
CONTINUOUS
50Ω COXIAL
CABLE
ANTENNA
(RF OUT)
74
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
3 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 POWE R 20 0 mW
ATTENUATOR (OPTIONAL)
1
TRANSMITTER UNDER TEST
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
SHEILDED
AUDIO CABLE
MICROPHONE
(AUDIO INPUT)
2