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Multiplexer Card Numbers
HP plug-in modules installed in an HP VXIbus mainframe are treated as
independent instruments each having a unique secondary HP-IB address.
An instrument may be composed of a single plug-in module or multiple
plug-in modules. The card number identifies the module within a
switchbox or scanning voltmeter configuration. The multiplexer module
with the lowest logical address is always card number 01. The multiplexer
module with the next successive address is 02, and so on. Figure 2-1
illustrates the card numbers and logical addresses of typical single-module
switchboxes. Figure 2-2 illustrates the card numbers and logical addresses
of a typical multiple-module switchbox. Figure 2-3 illustrates the card
numbers and logical addresses of a typical multiple-module scanning voltmeter.
Figure 2-1. Card Numbers for Single-Module Switchboxes
Figure 2-2. Card Numbers for Multiple-Module Switchbox
18 Configuring the HP E1351A/53A FET Multiplexer Modules Chapter 2