Keithley 2001

IEEE-488 Reference
4-104
Query
:MCHannel? Query measure channel
Short-form formats: :rout:scan:rat:mch?
:rout:scan:delt:mch?
Response message: (@ chanlist) where; chanlist = 1 to 10
Description
These commands are used to select the measure channel for the ratio and delta calculations. Note
that channel 5 and channel 10 (which is the default) are the high speed solid state switches on
the Model 2001 SCAN. Also note that channels 6 through 10 cannot be selected when the Ω 4
function is selected for the specified calculation (see :FUNCtion).
When the ratio calculation is performed (see :SCAN:LSELect), it is calculated as follows:
When the delta calculation is performed (see :SCAN:LSELect), it is calculated as follows:
Programming example 10 OUTPUT 716; “:rout:scan:rat:mch (@2); mch?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Selects channel 2 as the measure channel, and then queries the measure channel.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the reference channel (@2).
:LSELect <name>
:ROUTe:SCAN:LSELect <name> Perform specified scan operation
Parameters
<name> = INTernal Enable scan for internal scanner card
= EXTernal Enable scan for external scanner card
= RATio Perform ratio calculation
= DELTa Perform delta calculation
= NONE Disable all scan operations
Format
:rout:scan:lsel <name>
Defaults
Power-up Saved power-on setup
*RST NONE
:SYSTem:PRESet NONE
Query
:LSELect? Query scan operation
Short-form format: :rout:scan:lsel?
Response message: INT, EXT, RAT, DELT or NONE
Ratio
Measure Channel
Reference Channel
---------------------------------------------=
Delta = Measure Channel - Reference Channel