*RST

Reset Command. Sets the instrument functions to the factory default power up

 

state.

 

*TST?

Self Test Query. Returns a '0' when the VXI interface and processor are operating.

*OPC

Operation Complete Command. Sets the Operation Complete bit in the Standard

 

Event Status Register when execution of the preceding operation is complete.

*OPC?

Operation Complete Query.

Returns a '1' when the preceding operation has been

 

completed.

 

*WAI

Wait to Continue Command.

Inhibits execution of an overlapped command until

 

the execution of the preceding operation has been completed.

*TRG

Trigger Command. Equivalent to Group Execute Trigger.

*STB?

Read Status Byte Query. Returns the value of the Status Byte as an nr1 number (0-

 

255).

 

*SRE <nrf>

Service Request Enable Command. Sets the Service Request Enable Register.

*SRE?

Service Request Enable Query. Returns the value of the Service Request Enable

 

Register as nr1.

 

*ESR?

Standard Event Status Register Query. Returns the value of the Status Event Status

 

Register as nr1.

 

*ESE <nrf>

Standard Event Status Enable Command. Sets the Standard Event Enable Register.

*ESE?

Standard Event Status Enable Query. Returns the value of the Standard Event

 

Status Enable Register as nr1.

 

*CLS

Clear Status Command. Clears all the Status Event registers and clears the Error

 

Queue. Does not affect the Enable Registers.

The IEEE 488.2 Device Clear function only affects the remote functions. The input and output buffers are cleared and the instrument put into a state to accept new messages. Earlier versions of IEEE 488.1 put the instrument functions into a defined state, but this is now performed by the *RST common command.

Device dependent commands

The following list describes the features of the device dependent mnemonics for the instrument together with simple examples of their use within each major section (Carrier frequency, RF level, etc.) The root mnemonic is listed first followed by the lower level mnemonics. Each group is followed by a list of requirements for data type and suffix.

In addition to the normal listen commands the instrument accepts query commands which cause it to prepare a message which will be sent to the controller when the instrument is next addressed to talk. For each query an example of a response is given. Where responses are similar for a group of queries not all are listed. Some queries can produce more than one type of response - an example of each is usually given.

In the list which follows, the abbreviations <char>, <nrf> and <str> have the following meanings:

<char>

=

Character Program Data

<nrf>

=

Decimal Numeric Program Data

<str>

=

String Program Data

Where the data format is Decimal Numeric Program Data, the value may be expressed as a signed or unsigned number in any of the following formats:

nr1:

Decimal integer, e.g. 1234 or -567

nr2:

Floating point number, e.g. 1.234 or -56.789

nr3:

Floating point number with exponent, e.g. 1.2345E5 or -12.47E-8

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VXI 3002 manual Device dependent commands, Opc