Operating Manual R&S SMIQ - Volume 1 - Rohde & Schwarz

RS-232-C InterfaceSMIQA.2 RS-232-C InterfaceThe instrument is fitted with an RS-232-C interface as standard. The 9-pin connector is at the rearpanel. A controller can be connected via this interface for remote control.A.2.1Interface characteristics Serial data transmission in asynchronous mode Bidirectional data transmission via two separate lines Transmission rate selectable from 1200 to 115200 baud Logic 0 signal from +3 V to +15 V Logic 1 signal from -15 V to -3 V An external instrument (controller) can be connected Software handshake (XON, XOFF)v Hardware handshakeRxD DTRTxD1659RTSDSR CTSFig. A-2Pin assigment of RS-232-C connectorA.2.2Signal linesRxD (Receive Data),Data line, transmission from external controller to instrument.TxD (Transmit Data),Data line, transmission from instrument to external controller.DTR (Data terminal ready),Output (log. 0 = active). With DTR, the instrument indicates that it is ready to receive data. TheDTR line controls whether the instrument is ready for reception or not.GND,Interface ground, connected to instrument ground.DSR (Data set ready),(Instead of the CTS line, the DSR connector is used for instruments with a VAR2 REV3 frontmodule.)RTS (Request to send),Output (log 0 = active). With RTS, the instrument indicates that it is ready to receive data. TheRTS line controls whether the instrument is ready for reception or not.CTS (Clear to send),Input (log 0 = active). CTS tells the instrument that the opposite station is ready to receive data.1125.5555.03 A.4E-7