Rohde & Schwarz SML01, Руководство по эксплуатации

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Interfaces R&S®SML / R&S®SMV03
1090.3123.12 E-6 5.28
RS-232-C Interface
The instrument is fitted with an RS-232-C interface as standard. The 9-contact interface is provided at
the rear of the unit. A controller for remote control can be connected via the interface.
Characteristics of Interface
Serial data transmission in asynchronous mode
Bidirectional data transmission via two separate lines
Selectable transmission rate from 120 to 15200 baud
Logic 0 signal level from +3 V to +15 V
Logic 1 signal level from –15 V to –3 V
An external unit (controller) can be connected
Software handshake (XON, XOFF)
Hardware handshake
RxD DTR
1
6
5
9
TxD
DSR CTS
RTS
Fig. 5-6 Pin assignment of RS-232-C interface
Signal Lines
RxD (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 (logic zero = active). With DTR, the instrument indicates that it is ready to receive data.
The DTR line controls the instrument’s readiness for reception.
GND :
Interface ground, connected to instrument ground.
DSR (Data Set Ready):
(In the case of instruments with a VAR2 REV3 front module, the DSR line is used instead of
the CTS line.)
RTS (Request To Send):
Output (logic 0 = active). With RTS, the instrument indicates that it is ready to receive data.
The RTS line controls the instrument’s readiness for reception.
CTS (Clear To Send):
Input (logic 0 = active). CTS informs the instrument that the opposite station is ready to receive
data.