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