Teledyne ADFM Analog Output Module, Technical Manual, Page: 82 / 156

Appendix C
C-1.1 ADFM Data Communication and Command Format
You can enter commands with either a dumb terminal or an IBM-
compatible computer running a terminal emulator program such as RDI’s
BBTALK.EXE . The ADFM communicates with the terminal/computer
through an RS-232 (or RS-422) serial interface. We initially set the ADFM
at the factory to communicate at 9600 baud, no parity, and 1 stop bit.
Immediately after you apply power to the ADFM, it enters the STANDBY
mode. Sending a BREAK signal from a terminal/program awakens the
ADFM. The BREAK signal must last at least 400 ms. When the ADFM
receives a BREAK signal, it responds with a wake-up message similar to
the one shown below. The ADFM is now ready to accept commands at the
“>” prompt from either a terminal or computer program.
Broadband ADFM Version 6.xx
RD Instruments (c) 1991-94
All rights reserved>
C-1.2 Command Input Processing
Input commands set ADFM operating parameters, start data collection, run
Built-In tests (BIT), and ask for output data. All commands (Table A-1) are
ASCII character(s) and must end with a carriage return (CR). For example,
>WS030 <CR> [Your input is underlined.]
If the entered command is valid, the ADFM executes the command. If the
command is one that does not provide output data, the ADFM sends a line
feed <LF> and displays a new “>“ prompt. Continuing the example,
>WS030 <CR> [Your original input]
<LF>>
[ADFM response to a valid, no-output command]
If you enter a valid command that produces output data, the ADFM exe-
cutes the command, displays the output data, and then redisplays the “>”
prompt. Some examples of commands that produce output data are ? (help
menus) and CS (start pinging).
If the command is not valid, the ADFM responds with an error message
similar to the following.
>WSA<CR> [Your input]
>WSA ERR 002: NUMBER EXPECTED<CR><LF> \_
[ADFM
response]
>
After correctly entering all the commands for your application, you would
send the CS-command (or <Tab>) to begin the data collection cycle.
page C-2 MGD Technologies, Inc.