Instrument Definition

SCPI-compatible plug-in modules installed in the mainframe are treated as independent instruments each having a unique secondary GPIB address. As shown in Figure 1-3, each instrument is assigned a dedicated error queue, input and output buffers, status registers and, if applicable, dedicated mainframe memory space for readings or data. An instrument may be composed of a single plug-in module (such as a counter) or multiple plug-in modules (for a Switchbox or Scanning Voltmeter Instrument). In addition, the mainframe contains a built-in instrument called the System Instrument which has a Pacer for timing external devices. The System Instrument also can control the built-in RS-232, as well as up to seven optional Agilent E1324A plug-in serial interfaces.

Figure 1-2. Instrument Concept

Getting Started 1-3

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Agilent Technologies 75000 SERIES B, E1301B, E1300B user manual Instrument Definition, Instrument Concept Getting Started