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March 1999
Part No. 001-2009-600
BACKPLANE SCHEMATIC
FIGURE 10-43
10-38
331
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
ALARM 1 OUT +
ALARM 2 OUT +
SYNC IN
COM 17
MSTB
MREQ
D1
D3
D5
D7
EXT REQ 2
SQUELCH ENABLE
ALARM 4 IN +
ALARM 3 IN +
ALARM 2 IN +
ALARM 1 IN +
A13
A15
A17
A19 A18
A16
A14
A12
ALARM 1 IN -
ALARM 2 IN -
ALARM 3 IN -
ALARM 4 IN -
IAC 41
D4
D6
D2
D0
RD
WR
COM 49
COM 50
ALARM 1 OUT -
ALARM 2 OUT -
COM 53
COM 54
COM 55
THERMAL SENSOR
POWER SWITCH
+15V
ACC
+15V
FILT
-5V
+5V
+15V
+15V
FILT
-5V
+5V
+15V
331
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
TLA+
SYNC IN
COM 17
MSTB
MREQ
D1
D3
D5
D7
A1
A3
A5
A7
A9
A11
A13
A15
A17
A19 A18
A16
A14
A12
A10
A8
A6
A4
A2
D4
D6
D2
D0
RD
WR
COM 49
COM 50
TLA-
COM 53
COM 54
COM 55
HSDB-
IRDB-
-5V
+5V
+15V
-5V
+5V
+15V
P1
IAC SLOT
P3, P5, P7, P12, P14, P16, P18
A0
+15V
FILT
2
LPTT
RNT TX DATA
RNT RX DATA
6
4
P11
IRDB+
COM 26
WO 13
+15V
FILT
1
P11
HSDB-HSDB+
5
3
ALARM BUS (1-2)
ALARM BUS (3-8)
F3
1A
F2
4A
F1
4A
WO 4
WO 1
WO 6
WO 7
WO 3
WO 5
WO 8
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
EXT REQ 2
SQUELCH ENABLE
ALARM 4 IN +
ALARM 3 IN +
SYNC IN
COM 17
ALARM 3 OUT +
ALARM 4 OUT +
TX DATA OUT
COM 53
COM 54
COM 55
I/O 13
ALARM 3 IN -
ALARM 4 IN -
IAC 41
EXT OUT 1
COM 49
COM 50
ALARM 3 OUT -
ALARM 4 OUT -
TX DATA IN
RX VOICE
TX VOICE
BUF RX WBAND
COMM 6
P10
(TO GREEN CONNECTOR J1)
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
PTT ENABLE
TX AUDIO
SQ ENABLE
RX VOICE
MA
HS DATA ENABLE
RXS+
TXS+
VOTER AUDIO
VOTER DATA IN
RSSI
WB DISC
LOGIC NOISE SQ
SUB TX DATA
HS DATA
RX DATA
MB
RXS-
TXS-
EXT MOD
EXT REQ 1
AC FAIL OUT
J1
(TO GREEN CONNECTOR J2)
1 17
2 18
3 19
4 20
5 21
6 22
7 23
8 24
9
25
10 26
11 27
12 28
13 29
RX WBAND
ALARM 4 OUT +
ALARM 3 OUT +
COMM 6
EXT OUT 1
RF CLOCK
AC FAIL IN
SYN CS RX
WO 1
RF MUX 1 INH
RF MUX 2 INH
ALARM 3 OUT -
ALARM 4 OUT -
BUF RX WBAND
AC FAIL OUT
WO 2
HS CS RX
SYN CS EX
I/O 13
A-D LEVEL
RF DATA A
P9
1 17
2 18
3 19
4 20
5 21
6 22
7 23
8 24
9 25
10 26
11 27
12 28
13 29
TXS-
TXS+
RXS-
RXS+
COMM 6
I/O 13
V REF EX
TX DATA OUT
TX DATA IN
EXT REQ 1
EXT MOD
RSSI
RX VOICE
TX AUDIO
SUB TX DATA
PTT EN
HS DATA
HS DATA ENABLE
RX DATA
MA
MB
VOTER AUDIO
A-D LEVEL
RX WBAND
WO 3
TX MOD
P2, P4, P6, P8, P13, P15, P17
1 2
3
4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
HS CS EX
PC STR
WO 1
WO 4
RX WBAND
RF DATA A
RF DATA C
RF MUX 2 INH
RF CLOCK
HS CS RX
RF MUX 1 INH
RF MUX 3 INH
LPTT
SYN CS EX
TX MOD
WO 3
WO 2
RF DATA B
A-D LEVEL
RF DATA
SYN CS RX
RSSI
J2
RF INTERFACE CONNECTOR
WO 16
WO 17
SYNC IN
COM 50
27 28
29 30
31 32
33 34
V REF EX
14
15
16
30
31
32
WB DISC
SQ ENABLE
LOGIC NOISE SQ
WO 4
RX VOICE
TX VOICE
14
15
16
30
31
32
RF MUX 3 INH
PC STR
HS CS EX
RF DATA B
RF DATA C
RF DATA
AUDIO/DATA BUS 2
AUDIO/DATA BUS 1
27
29
31
33
28
30
32
34
ALARM 1 IN +
ALARM 2 IN +
ALARM 1 OUT +
ALARM 2 OUT +
ALARM 1 IN -
ALARM 2 IN -
ALARM 1 OUT -
ALARM 2 OUT -
+15V
ACC
+15V
ACC
WO2