11-12 Communications Interfaces
Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006
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Baud rate
The baud rate is the rate at which the SourceMeter and the programming terminal
communicate. Choose one of the following available rates:
• 115200
• 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 computer that you
are connecting to the SourceMeter can support the baud rate you selected. Both
the SourceMeter 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.
Flow control (signal handshaking)
Signal handshaking between the controller and the instrument allows the two
devices to communicate to each other regarding being ready or not ready to
receive data.
The RS-232 interface provides two control lines (RTS and CTS) for this purpose
(see
). When the Series 2600 is ready to send (RTS)
data, it will transmit when it receives the clear to send (CTS) signal from the
computer.
To enable or disable flow control, use the RS-232 configuration menu. Select
HARDWARE to enable flow control, or NONE to disable it.
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