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(8.5x11) 6000 Manual Cover - Newport Corporation

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5.2 Device Independent Commands<br />

*CAL?<br />

Calibration Query<br />

Syntax: *CAL?<br />

Parameters: None<br />

Function:<br />

This routine performs an auto calibration sequence on both channels. The<br />

calibration sequence measures the amplifier offsets at all gain settings. These<br />

measurements are stored and subtracted from subsequent measurements.<br />

Acquisition is suspended during auto calibration and no other remote commands<br />

will be processed until the auto calibration sequence is complete.<br />

Returns: <br />

represents the integer 0. This return value is generated when<br />

autocalibration is complete.<br />

Related Commands: None<br />

*CLS<br />

Clear Status<br />

Syntax: *CLS<br />

Parameters: None<br />

Function:<br />

This command clears the Standard Event Status register, device event register,<br />

and the error queue. As a result of this command the status byte is<br />

cleared except for the message available bit (bit 4). Because this command<br />

does not clear the input and output buffers the MAV bit will not be affected.<br />

The *CLS command also cancels any outstanding *OPC and OPC? commands.<br />

Related Commands: *ESR?, EVENT?, *IST?, *STB?<br />

*ERR?<br />

Error Query<br />

Syntax: *ERR?<br />

Parameters: None<br />

Function:<br />

Returns (and removes) oldest error message from the error queue. The error<br />

message is made up of an error code and a text description of the error (see<br />

the Appendix B). A maximum of 10 errors can be stored in the queue. If no<br />

38

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