Motorola MTR2000 Manual page 68

1
14.2VDC
J4102
2
V_OMNI
J4102
3
V_CNTL
J4102
4
PA_ENABLE
J4102
5
J4102
6
C4112 C4106 C4105
J4102
470pF 470pF 470pF
J4101
V_OMNI
CR4104
R4113
1000
R4101
14.2VDC 1.0
C4108
1000pF
CR4103
A
R4103
270
CR4101
V_CNTL
R4110
270
C4107
10.0 µ F
IGNORE
C4104
470pF
14.2VDC
C4101 C4103
10.0 µ F
470pF
U4101
IGNORE
RFIN V1 V2 V3 RFOUT
R4118
1 2 3 4 5
3.3
R4112 R4106
1500 1500
R4109
R4102
0.0
0.0
IGNORE
IGNORE
R4104
14.2VDC
0.0
B
Q4102
E C
V_OMNI
R4105
B
C4102
1OK 10.0 µ F
R4107
1000
CR4102
R4108
330
Q4101
C4108 R4111
1000pF 1000
14.2VDC
V_OMNI
V_CNTL
U4106
RFOUT
C
GND2
IGNORE
C4113
470pF
3 4
POWER ENABLE
1
U4102
RFIN
U4103
2
GND1
RFOUT
GND2
IGNORE
IGNORE
TTD6470
Signal
Path
Zero output: 0V
A
30/40W: typ 5V
Zero output: 0V
B
30/40W: typ 5.5V
Bias off: 0V
C
Bias on: 5V
30/40W PA MODULE
MODEL TTD1921A/TTD1781A
U4105
1 3
1
RF_IN RF_LOAD
2
R4119
IGNORE
J4103
1
IO
2
IGNORE
Description/Nominal Signal Levels
TTD6470B 30/40W INPUT BOARD
51
68P81094E14-C
Schematics (Sheet 3 of 18)
03/26/99