Am Audio Distortion Measurement - HP 8920A Application Handbook

AM Transmitters

AM Audio Distortion Measurement

POWER
OFF ON
!
50Ω COXIAL
CABLE
ANTENNA
(RF OUT)
128
Description
This procedure is used to measure an AM Transmitter's audio
frequency harmonic distortion level.
TX TEST
ANT IN
RF IN/OUT DUPLEX OUT
M AX POWER 60 W
!
M AX POWE R 20 0 mW
CONTINUOUS
ATTENUATOR (OPTIONAL)
1
TRANSMITTER UNDER TEST
3 Knob Data Entry
SCREEN CONTROL
MSSG HELP CONFIG HOLD PRINT
RX TX DUPLEX PREV TESTS
USER DATA FUNCTIONS
k1' REF SET METER AVG
INCR INCR INCR X10
k1 7
: 10 SET
k2' LO LIM IT HI LIMIT
k2
4
k3'
CURSOR CONTROL
k3
ASSIGN 1
k4
RELEASE
0
PUSH TO SELECT
k5
YES
ON/OFF
SHIFT CANCEL
MIC/ACC VOLUME SQUELCH AUDIO OUT
2
Keys
INSTRUMENT STATE
ADRS SAVE
MEAS
LOCAL RECALL PRESET
RESET
DATA
8 9
ENTER
dB
GHz
5 6
dBm
%
MHz
2 3
V
s
+ _ kHz
mV
Ω
NO ms
ppm % Hz
µV
W dBµV
M EMORY
CARD
AUDIO IN
HI LO
M AX MAX
! !
12 v Pk 42 v Pk
SHEILDED
ADUIO CABLE
MICROPHONE
(AUDIO INPUT)