Motorola Professional GP340 Service Manual page 191

VHF PCB 8486062B12 / Schematics
R5
R5
R5_1_VCO
R5_1_VCO
R3802
R3802 R:4.6V
100
R:4.6V
100
T: 0V
T: 0V
C3810
C3810
C3804
C3804
0.1uF 10pF
0.1uF
NU
R3807
R3807
L3801 1K
L3801 1K
800mV
100nH
NU
RX_INJ_1_VCO 800mV
100nH
NU
RX_INJ_1_VCO C3801 RMS
C3801 RMS
RX_INJ
RX_INJ
R3806
4.7pF Q3801
4.7pF Q3801
C3802
R3801 C3802
22pF
R3801
220
22pF
220 NU R3808
NU
NU R3808 R3804
NU
10 R3805
R3804
10 10K
R3805
10K 24K
24K
R:0.9V
R:0.9V
T: 0V C3803 R3803
T: 0V C3803 R3803
220
1000pF
220
1000pF
RF mV RMS measured with high impedance probe.
RF mV RMS measured with high impedance probe.
SH3801 SH3802
SH3801 SH3802
SHIELD SHIELD SHIELD SHIELD
SHIELD SHIELD SHIELD SHIELD
1 1
1 1
Vdda
Vdda
Vdda_3_VCO
Vdda_3_VCO
3.3V
3.3V
R:4V
R:4V
R3817
T: 2.8V
R3817
T: 2.8V 0
0
R3811
R3811
100
100
L3811 L3812 C3811 C3812 R3818
L3811 L3812 C3811 C3812
10pF 100nH 100nH 0.1uF 0.1uF
100nH 100nH 0.1uF 0.1uF
NU
18 14
18 14
R3806 10
10 TX_OUT
C3806 TX_IADJ
22
TX_OUT
C3806
22 8
8 RX_OUT RX_IADJ
RX_OUT SUPER_FLTR
12
100pF SUPER_FLTR
12
100pF PRESC_OUT COLL_RFIN
PRESC_OUT COLL_RFIN
RX_BASE
U3801
7
U3801 RX_BASE
7 RX_SWITCH
50U54 RX_EMITTER
RX_SWITCH
C3805 13 50U54 RX_EMITTER
C3805 13 TX_BASE
4.7pF TX_SWITCH
TX_BASE
4.7pF TX_SWITCH
TX_EMITTER
TX_EMITTER
FLIP_IN
TRB_IN
11 9
17
11 9
17
C3808
C3808
15pF
15pF R3832
R3832
12K
12K
C3815
C3815
C3809 L3809 1000pF
500mV C3809 L3809 1000pF
27pF 27nH
500mV
27pF 27nH
RMS
RMS
T5_1_VCO
T5_1_VCO R3830
T5 R3830
T5
0
TX_INJ_1_VCO
0 NU
TX_INJ_1_VCO
3.1V
3.1V
R3816 PRESC_1_VCO
L3816
PRESC_1_VCO
R3816
L3816
VSF
VSF 100nH PRESC
1K
TX_INJ 100nH
1K
TX_INJ
C3816
C3816
6.8pF
6.8pF
VSF
VSF
VSF_1_VCO
VSF_1_VCO
4.55V
4.55V
L3813
L3813
1uH
1uH
C3822
C3813 C3822 R: 250mV RMS
R3818 1000pF
C3813 R: 250mV RMS
1000pF
.01uF
0
.01uF C3825
0
NU
C3825
15pF
NU
R3821 R3822
15pF
R3821 R3822
C3818
C3818
220 47
220 47
C3824 L3821
.022uF C3824 L3821
56pF 56nH
.022uF
56pF 56nH
1
C3826
TX_IADJ 1
C3826
2
RX_IADJ
2
3
4.7pF
3 R3825
R3826 4.7pF
4 R3825
R3826
4
5
33 18
5
6 33 18
6
16
C3823
16
C3823 L3826
R:1.7V
15 .01uF
L3826
R3831 R:1.7V
15 .01uF 1uH
R3831 T: 0V
20 1uH
T: 0V
FLIP_IN 20
19 10K
TRB_IN 19 10K
C3821
R3824 R3823
C3827
C3821
R3824 R3823
33K
.01uF 22K 0.22uF
33K
.01uF 22K
C3835
C3835
C3832
C3832
1000pF
T: 250mV RMS
1000pF
6.8pF
T: 250mV RMS
6.8pF
C3836
R3834
C3836
R:0V R3834
R3833
R:0V
R3833
T: 3.1V 47
15pF
T: 3.1V 47
15pF
220 C3833 C3834
L3831
220 C3833 C3834
R3829 4.7pF
56pF L3831
R3829 4.7pF 56nH
TRB 56pF
56nH
TRB
0
NU TRB_1_VCO
0
TRB_1_VCO
R3835 R3836
R3835 R3836
VSF VCO_MOD
VSF VCO_MOD
10K
PRESC
47K VCO_MOD_1_VCO
10K
47K VCO_MOD_1_VCO
D3832
D3832
R, T: 3.5V-9.5V
R, T: 3.5V-9.5V
@ 135MHz-174MHz
@ 135MHz-174MHz
R: 1V RMS
R: 1V RMS
D3821
D3821
C3830
VCTRL_1_VCO
L3824 R3828
C3830
68pF VCTRL_1_VCO
L3824 R3828
68pF
1uH
100
1uH
100
L3822 L3823 C3828
L3822 L3823 L3825 C3828
47nH 47nH .01uF
L3825
47nH 47nH 100nH .01uF
100nH
C3829
C3829
.01uF
.01uF
BIAS_ADJ_1_VCO
R3812
BIAS_ADJ_1_VCO
R3812
BIAS_ADJ
BIAS_ADJ
100K NU
100K NU
C3827
0.22uF
L3834 C3842
L3834 C3842
1uH 1000pF
T: 1V RMS 1uH 1000pF
D3831
T: 1V RMS
D3831
L3832 L3833
L3832 L3833
68nH 56nH
68nH 56nH
ZWG0130020-B
ZWG0130020-B
VHF (136-174 MHz) Voltage Controlled Oscillator
4-11
VCTRL
VCTRL
0102726B14
0102726B14
VCO
VCO
ZWG0130020-B