Motorola GP series Service Manual

UHF PCB 8480587Z03 Schematics 4-27
UHF (403-470 MHz) Voltage Controlled Oscillator
C281
100pF
R245
240
390nH
L281
33nH
L273
C276
2.2uF
L271
68nH
TX_INJ
RX_INJ
0.1uF
C273
C272
NU
VSF
C271
NU
0.1uF
C286
PRESC
Rx_sw
Tx_sw
10
TX_OUT
13
TX_SWITCH
12
PRESC_OUT
8
RX_OUT
7
RX_SWITCH
9
GND_FLAG GND_LOGIC
17 11
GND_BUFFERS
3
SUPER_FLTR
19
TRB_IN
16
TX_BASE
15
TX_EMITTER
1
TX_IADJ
5
RX_BASE
6
RX_EMITTER
2
RX_IADJ
4
COLL_RFIN
20
FLIP_IN
U241
50U54
18 14
VCC_LOGIC
VCC_BUFFERS
C297
.01uF
AUX3
5V
4
Q260
2
1
3
47K
10K
4.7K
47K
100pF
C289
AUX4
1K
R260
DD
3
Q261
4
1
2
47K
4.7K
10K
47K
7.5K
R253
Tx_sw
7.5K
R254
R252
330
C255
100pF
18
R251
P1
1
2
P2
RESONATOR
L253
3.6pF
C254
3
P3
1
SH241
SHIELD
1
SH242
SHIELD
VCO TOP SHIELD
VCO BOTTOM SHIELD
R248
30
VSF
C247
100pF
C248
0.1uF
A1
12
A2
CR241
1.8pF
C253
CR251
L251
33nH
C252
10pF
100pF
C251
100pF
C285
200
R242
C246
100pF
18
1
2
3
R241
RESONATOR
L243
12K
R244
C245
2.4pF
1
2
BFQ67W
Q241
3
390nH
L282
10K
R243
Rx_sw
C243
7.5pF
2pF
C244
7.5pF
C242
CR243
7.5pF
C250
L242
220nH
CR242
C241
100pF
L241
390nH
VCTRL
9.55mV (Rx)
5.058V (Tx)
5V (Rx)
5.05V (Tx)
5.043V (Rx)
3.218V (Tx)
9.59mV (Rx)
4.998V (Tx)
4.639V (Rx)
4.567V (Rx)
4.613V (Tx)
1.978V (Rx)
3.499V (Rx),4.125V (Tx)@403.355MHz
8.798V (Rx),9.216V (Tx)@469.985MHz
ZMY0130019-D
ZMY0130019-D

Motorola GP series Specifications

General

Operating Temperature	-30°C to +60°C
Frequency Range	136-174 MHz
Number of Channels	16
Channel Spacing	12.5 kHz / 25 kHz
Battery Life	8 hours (with standard battery)
Operating Voltage	7.5V DC
Ingress Protection	IP54
MIL-STD	810 C, D, E, F