Features and Functions 4
Keysight 34970A/34972A User’s Guide 193
– Modem: This mode uses the DTR/DSR and RTS/CTS lines to control the flow
of data between the instrument and a modem. When the RS-232 interface is
selected, the instrument sets the DTR line true. The DSR line is set true when
the modem is on-line. The instrument sets the RTS line true when it is ready to
receive data. The modem sets the CTS line true when it is ready to accept
data. The instrument sets the RTS line false when the input buffer is almost
full (approximately 100 characters) and releases the line when space is
available again.
– The flow control selection is stored in non-volatile memory, and does not
change when power has been off, after a Factory Reset (*RST command), or
after an Instrument Preset (SYSTem:PRESet command).
– Front-Panel Operation:
FLOW RTS/CTS
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