Operating instructions

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A B C D
6
54321
D
C B A
Title
Number RevisionSize
Orcad B
Date: 31-Jul-1998 Sheet of File: D:\RFT_MasterFiles\..\9103-TxUHF-block.schDrawn By:
U4
250Hz
MICROPROCESSOR CONTROLER
A/D
+13.8
ASYNC.
DATA I/O
Rx DATA Tx DATA
BCD CHANNEL CODE
1 PPM TCXO
PLL IC 12.5 KHz STEPS
LOOP FILTER
VCO ISOLATION AMPS
+10 dBm
FWD.POWER REV.POWER
TUNE V.
OUTPUT
- +
+
+8.0 V.REF.
POWER ADJUST
15W
OUTPUT
600 MHz LPFDIRECTIONAL
COUPLER
AMP. MODULE
VARIABLE GAIN AMP.
BUFFER AMPLIFIER
U1-U5,U11,U13
TX ENABLE
P.A. BOARD
DATA
LOCK
LINE IN LINE IN
Hi-Z INPUT
PTT IN
PTT
INPUT AMP. 750 uSec.
PRE-EMPHASIS
CLIPPER
VOICE DEVIATION
SUMMING AMP.
CTCSS MODULE
EXT.TONE INPUT
H1
DEVIATION
TEST MIC.
TEST KEY
+9.2 Vdc TRANSMIT SUPPLY Q14,Q16
T/R RELAY
TONE DATA
KEY
V.C.O.
FWD.PWR.
REV.PWR.
Q3,Q4,U1C
EXT.ALC.
XO1
MA4 MA5 MA1
MA2
MA3
Q2-Q7,Q11,Q21
Q19,Q20
V.C.O.
T1
U9A
ISO1
JP4 SW SPDT
D10 DIODE
U9D U7D
RV1 SET MAX
U7A U7B
3KHz LPF
JP8
U9C TONE AMP.
U7C 300 Hz LPF
RV3 SET TONE
U9B
TEST MIC. AMP.
D1 ALM
RV4 LINE LEVEL
U10B
Q25
U10A
U10C
D12
TX
RV2 MOD.BAL.
Q10
Q1,Q2
U2
U1A U1B
RV1
RF TECHNOLOGY Pty Ltd 17/8 Leighton Place, Hornsby, 2077, Australia
9103 (UHF Tx Block) 2
JBS after RHM