Hp E1368A User Manual download pdf (Page 15)

Instrument Definition

HP plug-in modules installed in an HP mainframe or used with an HP

command module are treated as independent instruments each having a

unique secondary HP-IB address. Each instrument is also assigned a

dedicated error queue, input and output buffers, status registers and, if

applicable, dedicated mainframe/command module 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).

Programming the Microwave Switch

To program the modules using SCPI commands, you must select the

controller Module language, interface address, and appropriate commands.

See the HP 75000 Series B Installation and Getting Started Guide or the

appropriate HP Command Module Manual for interface addressing and

controller language information of Microwave Switch modules in a

switchbox or scanning voltmeter configuration.

Note This discussion applies to SCPI programming. See Appendix B

(Microwave Switch Registers) for details on Microwave Switch modules

registers.

Selecting Channels: To address specific channels within a Microwave

Switch module in a switchbox, you must:

• send the appropriate SCPI command string to the switchbox (e.g.,

CLOSe, OPEN, etc.). For the Microwave Switch modules, use the

CLOSe command to connect the 2-port to the C-port. Use the OPEN

command to connect the 1-port to the C-port.

• specify the card number (01-99)

• specify the channel number (00-04)

Card Numbers The card number identifies the module within a switchbox. The Microwave

Switch card number depends on the switchbox configuration (single-module

or multiple-module) set for the switches.

• Single-module. For a single-module switchbox, the card number is

always 01.

• Multiple-module. For a multiple-module switchbox, the switch

module with the lowest logical address is always card number 01.

The card number with the next successive logical address is 02, and

so on. Figure 1-2 illustrates the card numbers and logical addresses

of a typical multiple-module switchbox.

}

channel_list

14 Getting Started with the HP E1368A/69A/70A Chapter 1

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Hp E1368A User Manual Page 15