HP 8920A Application Handbook page 87

FM Variation Of Sensitivity With Signal Frequency Measurement
POWER
OFF ON
!
50Ω COXIAL
CABLE
ANTENNA (RF INPUT)
Description
This procedure is used to measure an FM Receiver's usable bandwidth
(at 12 dB SINAD). A reference is established (at 12 dB SINAD), then
the level is increased by 6 dB. Frequency is increased and decreased
until the SINAD of 12 dB is again obtained. Usable bandwidth is then
calculated. Reference is EIA-204-D.
RX TEST
RF IN/OUT DUPLEX OUT ANT IN
M AX POWER 60 W
!
M AX POWER 200 mW
CONTINUOUS
1
RECEIVER UNDER TEST
3 Knob Data Entry
Keys
SCREEN CONTROL
M SSG HELP CONFIG HOLD PRINT ADRS
RX TX DUPLEX PREV TESTS LOCAL
USER DATA FUNCTIONS
k1' REF SET METER AVG
INCR INCR INCR X10
7
k1
: 10 SET
k2'
LO LIMIT 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
!
12 v Pk
TEST LOAD
FM Receivers
2
INSTRUMENT STATE
SAVE
MEAS
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
!
42 v Pk
SPEAKER
(AUDIO
+
INPUT)
GND
87