Models 2500 and 2502 User’s Manual Remote Operations 13-17
RS-232 interface operation
NOTE The programmable aspects of RS-232 operation (baud rate, data bits, parity,
and terminator) are configured from the COMMUNICATION option of the Main
Menu. See Section 1, “Main menu.”
Sending and receiving data
The RS-232 interface transfers data using 8 data bits, 1 stop bit, and no parity. Make sure
the device you connect to the Model 2500 also uses these settings.
You can break data transmissions by sending a ^C (decimal 3) or ^X (decimal 18) charac-
ter string to the instrument, or by sending an RS-232 break condition (holding the transmit
line low for >11 bits). This clears any pending operation, discards any pending output, and
returns a “DCL.”
Baud rate
The baud rate is the rate at which the Model 2500 and the programming terminal commu-
nicate. Choose one these available rates:
• 57600
• 38400
• 19200
• 9600
• 4800
• 2400
• 1200
• 600
• 300
The factory selected baud rate is 9600.
When you choose a baud rate, make sure the programming terminal or printer that you are
connecting to the Model 2500 can support the baud rate you selected. Both the Model
2500 and the other device must be configured for the same baud rate.
Data bits and parity
The RS-232 interface can be configured to send/receive data that is 7 or 8 bits long using
even, odd, or no parity. No parity is only valid when using 8 data bits.
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