Chapter 5 Remote Interface Reference

SCPI Command Summary

Rules for Using scan_list and ch_list Parameters

Before you can initiate a scan, you must set up a scan list to include all desired multiplexer or digital channels. Channels which are not in the list are skipped during the scan. The instrument automatically scans the list of channels in ascending order from slot 100 through slot 300.

∙Commands which accept a scan_list parameter will reprogram the scan list each time you send the command to the instrument. The scan_list parameter is never an optional parameter.

∙Commands which accept an optional ch_list parameter do not reprogram the scan list when you send the command to the instrument. If you omit the ch_list parameter, the command will be applied to the channels in the active scan list.

∙If a command specifies an illegal operation on a given channel, the instrument will generate an error for each channel which is illegal and the command will not be performed on any of the channels. For example, the following command will generate an error on channel 121 on the HP 34901A module since this channel is for current measurements only.

CONFigure:VOLTage:DC (@101,121)

∙If you select a range of channels in a command which specifies an illegal operation on one or more channels, the instrument will skip the illegal channels and will not generate an error. For example, the following command will not generate an error on the HP 34901A module even though channels 121 and 122 are for current measurements only.

CONFigure:VOLTage:DC (@101:220)

However, if the illegal channel is one of the end points in the range, the instrument will generate an error. For example, the following command will generate an error on the HP 34901A module since channel 122 is for current measurements only.

CONFigure:VOLTage:DC (@101:122)

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