Service manual

PROGRAMMING
4-18
April 2001
Part No. 001-9800-203
4.9.2 TRANSCEIVER AND PROGRAMMING
SOFTWARE REQUIRED
The input/output and serial bus functions are
available only in transceivers with software Version
205 or later. The software version can be determined
as described in Section 3.12.
To program these input/output lines, program-
ming software Version 204 or later is required. The
software version number is displayed on the top of
most programming screens.
4.9.3 PROGRAMMING FOR OPTIONS
The following accessories utilize programmable
I/O lines. Therefore, if any are installed, the particular
input and/or output line used must also be
programmed for that function.
•Compandor Module (Section 3.5.4)
•Encryption Module (Section 3.5.7)
•External Encoder/Decoder (Section 3.9.7)
For example, if a compandor module is installed
in Option Slot 2 and controlled by Output B, that I/O
line must be programmed for “Compand”. This
programming is performed in the Inputs/Outputs
section of the I/O screen in Figure 4-7. This is in addi-
tion to system or group programming for that function
if applicable. The only time I/O programming is not
required is if the transceiver has early software that
does not support I/O bus programming (Version 204 or
earlier). Only system or group programming is then
required.
4.9.4 PROGRAMMING I/O INTERFACE
OPTIONS
The screen used to program the I/O lines is shown
in Figure 4-7, and it is displayed by pressing F3 from
the Main Radio Parameters screen described in
Section 4.6.2. The screen in Figure 4-7 shows the
default condition of the various parameters. More
information on these parameters follows:
Disable IO Bus - This function applies to high tier
models only. Programming “Yes” disables all the
input/output lines shown on the bottom of the screen
and also the serial bus commands. This can be used to
prevent unauthorized access through the serial bus to
information stored in the transceiver. The other part of
this protection is the “Upload Key” described in
Section 4.5.5 which prevents unauthorized uploading
of information using the programming software.
Remote CMD Only - Sets up the serial bus for opera-
tion with an intelligent remote control unit. The stan-
dard configuration programmed by “No” allows the
use of a local control panel, with most functions being
controlled by the transceiver. The remote configura-
tion programmed by “Yes” allows an intelligent
remote control unit or computer to control most trans-
ceiver functions. The transceiver control logic func-
tions mostly as an interface with the external device.
Multi-Drop Mode - Programming “Yes” configures
the serial bus so that several control units can be con-
nected to the transceiver in a multi-drop configuration.
The TxD and RxD lines are tied together in this mode.
In addition, the Option 1 line is forced to be the multi-
drop bus Busy line (see MD BUS BUSY in Appendix
A.3.3).
NOTE: To perform reprogramming once the Multi-
Drop Mode is selected, the TxD and RxD lines must be
disconnected and the transceiver powered up in the
test mode.
Speaker Enable - Programming “No” closes audio
gate U307C (mutes the audio) and allows it to be
opened only by the proper remote (serial) command.
Mic Enable - Programming “No” closes transmit
audio gate U308B (mutes microphone signal) and
allows it to be opened only by the proper remote
(serial) command.
Inputs/Outputs - Programs the configuration of the
various input and output lines. Both the function and
active state can be programmed for each. Refer to
Appendix A for a complete description of these lines
and the functions that are available for each.