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R50 BLOCK DIAGRAM
05/9155/0001
1
8-Apr-2003
10:08:37
D:\Protel Files\Work Files\9155_0002.ddb - Documents\Block_Diagram.Sch
Title
Size:
Number:
Print Date:
File:
Revision:
Sheet
of
A3
RF Technology Pty Ltd
Unit 10, 8 Leighton Place
Hornsby, NSW 2077
Australia
Rev. Release Date:
Originator:
Rev No.
ECO No.
Description of Change
25-50MHz
BANDPASS FILTER
RF. AMP
Q401
25-50MHz
BANDPASS FILTER
BOULLE BAL.
MIXER
MX401
1ST IF AMP
Q402
246MHz SAW FILTER
FIL401
BOULLE BAL.
MIXER
MX401
2ND IF AMP
Q403
FIL404 FIL405
21.4MHz XTAL FILTER
NOISE BLK GATE
Q404
FIL402
IMPULSE NOISE
1ST LO AMP
2ND LO AMP
MA502
MA505
MA504
MA506
Q405 Q406
U403
D401
IMPULSE NOISE DETECTOR
AMPLIFIER
U404A Q408 U303B Q407
GAIN CONTROL
BLANKER GATE CONTROL
BLK PULSE GENERATOR
FIL403
X401
CERAMIC DISC
455KHz CERAMIC FILTER
455KHz CERAMIC FILTER
X402 21.855MHz
U401
FM IF RECEIVER CHIP
1ST VCO
2ND VCO
Q501
Q502
X402
REF
DUAL PLL CHIP
U302
IST VCO BUFFR AMP
2ND VCO BUFFR AMP
MA501
MA503
3RD LO
RSSI
RSSI BUFFER
U402D
NOISE DETECTOR
D403 U402C
HIGHPASS FILTER U402A
NOISE AMP
U402B
AUDIO AMP U605A
LOWPASS FILTER
1ST PLL LOOP FLT
2ND PLL LOOP FLT
SUB_TONE
SUBTONE AMP
U605C
U605B
DE-EMPHASIS / FLAT
U607A U607B
U609B
LINE SQUELCH
U607D
LINE OUT
LINE OUT
DIR AUDIO
AUDIO AMP
AUDIO AMP
MONITOR AMP
U609C
U609D
U604
MON SQUELCH
U607C
MON OUT
X601 4MHz
CTCSS CHIP
U602
RSSI
N DET
RF INPUT
DE-EMPHASIS / FLAT
LINE SQUELCH
MONITOR SQUELCH
SERIAL BUS
(CLOCK
MOSI CHIP_SELECT)
COS+
COS-
T601
RL602
COS CONTROL
U601 RL601
COS CIRCUIT
LOOP CONTROL
C619
A/D
RSSI
NSQ
VIN
LINE LEVEL
1ST LO BIAS
2ND LO BIAS
CSQ
DAC
U301
SERIAL_BUS
NSQ SET
NSQ_SET
REF SET
3RD LO SET
3RD LO SET
REF SET
PWR
SQ
ALARM
MICRO PROCESSOR
U204
RS232 TRANCEIVER
U201
U202
RS 232
SUB AUDIO
AUDIO
