Specifications

ZVx Introduction/Brief Instructions
1043.0009.50 3.1 E-15
3 Remote Control
3.1 Introduction
The instrument is equipped with two IEC/IEEE bus interfaces according to standard IEC 625.1/IEEE
488.1 and two RS-232 interfaces.
Either the connector labeled SCPI IEC625 (the upper IEC/IEEE bus interface) or both of the RS-232
interfaces can be used for remote control of the instrument. In addition, the instrument is equipped with
an RSIB interface that allows instrument control by Visual C++ and Visual Basic programs
In certain operating modes (e.g. frequency conversion measurements), the instrument can control other
instruments which are connected to it as part of an IEC/IEEE bus chain via the connector labeled SCPI
SYSTEM BUS (the lower IEC/IEEE bus interface). The usage of this IEC/IEEE bus interface is
described in further detail in the relevant sections of the operating manual.
The instrument supports the SCPI version 1994.0 (Standard Commands for Programmable
Instruments). The SCPI standard is based on standard IEEE 488.2 and aims at the standardization of
device-specific commands, error handling and the status registers (see Section 3.5.1, SCPI
Introduction).
This section assumes basic knowledge of IEC-bus programming and operation of the controller. A
description of the interface commands is to be obtained from the relevant manuals.
The RSIB interface
functions are matched to the function interface for IEC/IEEE-bus programming from National
Instruments. The functions supported by the DLLs are listed in annex A.
The requirements of the SCPI standard placed on command syntax, error handling and configuration of
the status registers are explained in detail in the respective sections. Tables provide a fast overview of
the commands implemented in the instrument and the bit assignment in the status registers. The tables
are supplemented by a comprehensive description of every command and the status registers.
The program examples for IEC/IEEE bus programming are all written in Quick BASIC.
3.2 Brief Instructions
The short and simple operating sequence given below permits fast putting into operation of the
instrument and setting of its basic functions. As a prerequisite, the IEC/IEEE bus address, which is
factory-set to 20, must not have been changed.
1. Connect instrument and controller using IEC/IEEE bus cable.
2. Write and start the following program on the controller:
CALL IBFIND("DEV1", analyzer%) ’Open port to the instrument
CALL IBPAD(analyzer%, 20) ’Inform controller about instrument
’address
CALL IBWRT(analyzer%, "*RST;*CLS") ’Reset instrument
CALL IBWRT(analyzer%, "FREQ:CENT 100MHz") ’Set center frequency to 100 MHz
CALL IBWRT(analyzer%, "FREQ:SPAN 10MHz") ’Set span to 10 MHz
The instrument now performs a sweep in the frequency range of 95 MHz to 105 MHz.
3. To return to manual control, press the LOCAL key at the front panel