Service manual

B-1
Revised May 1998
Part No. 001-9750-006
UNIVERSAL DIGITAL AND DATA INTERFACE
APPENDIX B UNIVERSAL DIGITAL AND DATA INTERFACE
B.1 GENERAL INFORMATION
B.1.1 SCOPE
This appendix describes the Universal Digital and
Data Interface (UD
2
I
™
) as it functions with Summit
®
DM Multi-Net® transceivers. This interface is also
available for Viking
®
HT. However, operation with
this transceiver is slightly different (the logic levels of
some lines are inverted).
Although this interface is available for Summit
DM transceivers with software Version 207 or later,
this description applies specifically to operation with
software Version 214 or later. Therefore, there may be
slight operation differences with the earlier versions of
software. Refer to Appendix A for more information
on software revisions. Transceiver software can easily
be updated using Flash programming. Refer to Section
4.7 for more information.
B.1.2 UNIVERSAL INTERFACE DESCRIPTION
The universal interface provides a means of
conveniently connecting external equipment to the
transceiver. Types of equipment that may be connected
include modems and data terminals.
To utilize the Universal Interface, the optional
universal interface cable (see Table 1-1) must be
factory or field installed in the transceiver. This cable
is approximately 1-foot long and connects to J403 and
J404 on the audio/logic board. It has a standard female
DB-25 connector (see below) for connecting the
external equipment. Also required is transceiver soft-
ware Version 207 or later as described in the preceding
section.
NOTE: Validation Key, Part No. 250-9750-050, is no
longer required to use this interface.
.
Figure B-1 Universal Interface Pin Designations
Rx Demod Out
Rx Demod In
Rx Filt Out
Rx Aud In
RX AUDIO
7
8
9
10
TX AUDIO
Tx Mic Out
Tx Mic In
Tx ECD In
Tx WB In
11
12
13
CONTROL
Squelch Req N
Input A
Input B
PTT
Busy Out
Aux 1
Output A
Output B
RSSI
PTT Request N
1
2
3
4
5
6
14
15
16
21
TxD TTL U
RxD TTL U
17
18
SERIAL DATA BUS
Sw Batt
8 VDC
GND
GND
22
23
19
24
SUPPLY
J601
20
DB25
Connector