Table 2. 50-Wire Instrument Bus Pin Connection Table for IF-Display Section
Pin
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
Signal
GND
NC
IOBO
IOB I
IOB2
IOB3
IOB4
IOB5
IOB6
IOB7
IOB8
IOB9
IOB10
IOB11
IOB12
IOB13
IOB14
IOB15
NC
NC
NC
HPON
ADRO
ADRl
ADR2
Description
Ground
No Connection
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
Instrument Bus Data Bits 0 -
15
15
15
15
15
15
15
15
15
15
15
15
15
15
Instrument Bus Data Bits 0-15
Instrument Bus Data Bits 0-15
No Connection
No Connection
No Connection
HIGH = IF-Display Section
Power ON
Instrument Bus Address Bits 0 - 4
Instrument Bus Address Bits 0 - 4
Instrument Bus Address Bits 0 - 4
Pin
26
27
28
29
30
31
32
33
34
35
36
37
39
40
41
42
Signal
ADR3
ADR4
ADRS
NC
NC
KR8
KR9
KR10
KR 11
KC0
KCI
KC2
KC4
KCS
KC6
KC7
Description
Instrument Bus Address Bits 0 - 4
Instrument Bus Address Bits 0 - 4
Address Bit 5 not used
No Connection
No Connection
Key Rows 8-11
Key Rows 8-11
Key Rows 8-11
Key Rows 8-11
Key Columns 0 - 7
Key Columns 0 - 7
Key Columns 0 - 7
Key Columns 0 - 7
Key Columns 0 - 7
Key Columns 0 - 7
Key Columns 0 - 7
43 LSTP L3W = Stop Processor
44 HSWP HIGH = Sweeping
45 LSRQ X>W ~ Service Request
46 LDSR X>W = Digital Storage Ready
47 LB10 LOW = RF Section I/O Strobe
48 GND Ground
49 LT10 LOW = IF-Display Section I/O
50 GND
Ground
IF Overall Block Diagram 3
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