Name: Keithley 2001
Brand: Keithley
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IEEE-488 Reference

4-101

Query :FUNCtion? <list> Query functions for speciﬁed channels

Short-form formats: :rout:scan:func? <list>

:rout:scan:ext:func? <list>

Response messages: NONE, VOLT:DC, VOLT:AC, TEMP, FREQ, RES, RJUNX, ALT,

CURR:DC, and CURR:AC

Note: The function for each channel is separated by a comma.

Description These commands are used to assign measurement functions for internal channels (e.g. Model

2001 SCAN) or external channels. You can assign a unique measurement function to each of

channel. The function parameter speciﬁes the measurement function for the channels speciﬁed

by the channel list (chanlist).

The following examples demonstrate the various forms for expressing the channel list:

List = (@ 5) Single channel.

= (@ 2,4,6) Multiple channels separated by commas (,).

= (@ 1:10) Range of channels (1 though 10). Range limits separated by a colon (:).

= (@ 1:5,7) Range entry and single entry separated by a comma.

The function parameter speciﬁes the measurement function for the channels listed in the chan-

list. As a scan is being performed, the Model 2001 will select the speciﬁed measurement func-

tion for each channel in the scan.

Any measurement function, except current (ACI and DCI), can be used for internal scanning.

Note that the Keithley Model 2001 SCAN scanner card cannot be used to make thermocouple

temperature measurements. Any measurement function can be used for external scanning (as-

suming you are using the appropriate switching card).

With the NONE function parameter selected, the channels speciﬁed in the chanlist will be not

be scanned. This will not change the deﬁned scan list, it will simply cause the speciﬁed channels

to be skipped.

With the ALTernate function parameter selected, the speciﬁed channels in the chanlist will be

measured according to the saved alternate setup conditions. An alternate setup is saved using the

[:SENSe[1]]:ALTernate SAVe command (see Sense subsystem).

Programming example 10 OUTPUT 716; “:syst:pres”

20 OUTPUT 716; “:rout:scan:func (@ 1,3,5,7), ‘volt:dc’”

30 OUTPUT 716; “:rout:scan:func (@ 2,4,6,8), ‘res’”

40 OUTPUT 716; “:rout:scan:func (@ 9,10), ‘none’”

50 END

Line 10 :SYSTem:PREset defaults; all ten channels in scan list.

Line 20 Assigns the DCV function to channels 1, 3, 5 and 7.

Line 30 Assigns the Ω2 function to channels 2, 4, 6 and 8.

Line 40 Masks channels 9 and 10. These channels will not be scanned.

Keithley 2001 User Manual

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