Specifications

292 Chapter 10
Block Diagrams RF Analyzer Section
Figure 10-5 Receiver Assembly, A2A21
X
15 kHz OR
30 kHz BW
10.7 MHz
CF
X
FM
DISC
X
X
+14 dB
4 dB PAD
IF1 SELECT
+7 dBm
7dB
ADJ
ADJ
LC
LC
10 dB
9 dB
+7
dBm
500 MHz LO
.
-
.
4
125 MHz
TRACKING
ALC
TO SQUELCH
ALC
0 dB
AM
DET
AM
DEMOD
IF1 SELECT
IF1 FILTER SELECT
ALC ON/OFF
SQUELCH LEVEL
DEMOD OUT SELECT
UP SQUELCH
SSB BFO SYNTH FREQ
IF PRESENT
GROUP
SERIAL I/O
A
MOTHERBOARD A2A1P/O
AA
1ST-IF
(FROM
DOWN-
CONVERTER)
CK D
EN/I
FROM
REFERENCE
FROM
REFERENCE
10 MHz REF
TO SSB BFO
& FM DEMOD
114.3 MHz REF.
TO SSB BFO
& FM DEMOD
114.3 MHz
IF OUT
+
-
5 MHz
+12.4
+5.1
-12.4
GND
10M Hz REF
BFO
FREQ
ON/OFF
ALC
REF
300 kHz
LPF
SSB
DEMOD
DEMOD OUTPUT
DEMOD OUTPUT SELECT
SQUELCH
700 kHz
IF CNT
>100 mV
TO CNTR
SQUELCH
LVL
PRESET
14 dB
GAIN
5 dB PAD
280 kHz
BW
LIM
10 MHz
REF
IF FILTER
SELECT
UP
SQUELCH
SQUELCH
FM
DEMOD
OFFSET
ZERO
INV1
AMP
AUDIO ANALYZER 1