User Manual

CIRCUIT DESCRIPTION
4-2
June 1997
Part No. 001-3492-001
Figure 4-1 TRANSCEIVER BLOCK DIAGRAM
U230
840.15-872.15 MHZ
1st LO AMP
RECEIVER
TRANSMITTER
SYNTHESIZER
SEC LO
CNTRL
RSSI
CLOCK
DATA
RX OUT
DIAG EN
DIAG
TX EN
RSSI
RF INTEST
Q240
87.85 MHz
Z220/Z221
Q211
Q260/Q261
Z201Q200/Q201Z200
Q500
DRIVER
U510
Q520/U130C
U520B
U520A
CR540/CR541
Q911
CLOCK
DIAG EN
U901
U902A
U902A
U900
DATA
RX OUT
DIAG EN
DIAG
TX EN
Q135
U130A/B/D
Q133/Q134
U111
Q110/U110
RF EN
R818
Q841
Q842
Q843
Q844
Q845
CTRL
+9V
LOWBAND +
LOWBAND -
SYNTH OUT
MOD ADJUST
MOD INPUT
T/R PS +
T/R PS -
Q820 Q821/Q822
Q823
U840
Q840
SYNTH DATA
U800
Q800
+13.3V
SYNTH EN
LOCK DET
Q132
Q131
Q130
Y800
RF AMP
MIXER
CRYSTAL FILTER
ANTENNA
SWITCH
RX AUDIO
VCO
AMPLIFIER
VCO
BUFFER/
RSSI
LOW-PASS
FILTER
RF OUT
RF BPF RF BPF
IF / 450 kHz FILTER
2nd LO AMP
AMPLIFIER
TX IN
TCXO
+13.3V
PWR SET
MOD ADJ
+9V TX
RX EN
+13.3V
SWITCHED
CLOCK
V FWD
V REV
+9.6V
+5.5V