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Getting Started

Using RS-232

Chapter 126

Using RS-232

The RS-232 serial interface can be used to communicate with the signal generator. The

RS-232 connection is standard on most PCs and can be connected to the signal generator’s

rear-panel AUXILIARY INTERFACE connector using the cable described in Table 1-13 on

page 27. Many functions provided by GPIB, with the exception of indefinite blocks, serial

polling, GET, non-SCPI remote languages, and remote mode are available using the RS-232

interface.

The serial port sends and receives data one bit at a time, therefore RS-232 communication is

slow. The data transmitted and received is usually in ASCII format with SCPI commands

being sent to the signal generator and ASCII data returned. The interface uses three-line

communication: Transmit, Receive, and Ground.

1. Selecting IO Libraries for RS-232

The IO libraries can be downloaded from the National Instrument website, www.ni.com, or

Agilent’s website, www.agilent.com. The following is a discussion on these libraries.

Agilent BASIC The Agilent BASIC language has an extensive IO library that can be used to

control the signal generator over the RS-232 interface. This library has

many low level functions that can be used in BASIC applications to control

the signal generator over the RS-232 interface.

VISA VISA is an IO library used to develop IO applications and instrument

drivers that comply with industry standards. It is recommended that the

VISA library be used for programming the signal generator. The NI-VISA

and Agilent VISA libraries are similar implementations of VISA and have

the same commands, syntax, and functions. The differences are in the lower

level IO libraries used to communicate over the RS-232; NI-488.2 and SICL

respectively.

NI-488.2 NI-488.2 IO libraries can be used to develop applications for the RS-232

interface. See National Instrument’s website for information on NI-488.2.

SICL Agilent SICL can be used to develop applications for the RS-232 interface.

See Agilent’s website for information on SICL.

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Agilent Technologies PSG Manual de Instruções Página 40