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1 COMPUTER INTERFACE
The 9412/9412A comes standard with an RS232 serial interface. All menu settings can be set
and retrieved over the computer interface using a simple command language.
Serial (RS232) Pinout
The serial port is located on the back of the 9412/9412A and uses a 9-pin D-type connector
with the following pinout (as viewed from the back of the 9412/9412A):
1. No connection
2. Tx - Transmit (to computer)
3. Rx - Receive (from computer)
4. DTR - connected to pin 6
5. Ground
6. DSR - connected to pin 4
7. RTS - connected to pin 8
8. CTS - connected to pin 7
9. No connection
The voltage level of the Transmit signal is +/-10V, the Receive signal should be at least +/-5V.
Command Language
All menu items can be accessed and selected via the computer interface using a simple com-
mand language.
Command Protocol
All commands have the following syntax:
$<name> <##>CR
where
PP $ indicates a command follows.
PP <name> is the command name. No spaces are allowed between the $ and the <name>. The
name is case sensitive.
PP <##> is an unsigned, integer associated with the command. A space must be inserted between
<name> and <##>.