Selecting the Input Channel
The correct input channel is automatically selected for resistance and
temperature measurement functions. For voltage measurements, you
must select the input channel.
The easiest, but least flexible, method to specify the input channel is by
using the channel parameter in the MEASure? or CONFigure commands.
For example,
CONFigure:VOLTage:DC MAX, MAX, (@FRONt1)
Channel 1
CONFigure:VOLTage:DC MAX, MAX, (@FRONt2)
Channel 2
In the SENSe subsystem, the keyword is modified to select the input
channel. For example,
SENSe1:VOLTage:RANGe 10
Channel 1 range setting
SENSe2:VOLTage:RANGe 10
Channel 2 range setting
For increased flexibility, and to take advantage of the independant null
and range settings for each input channel, you can set each input channel
as desired and switch between the input channels using the
ROUTe:TERMinals command. For example,
SENSe1:VOLTage:RANGe 10
Channel 1 range 10 V
SENSe2:VOLTage:RANGe .1
Channel 2 range 100 mV
ROUTe:TERMinals FRONt1
Select channel 1
READ?
Channel 1 measurement
ROUTe:TERMinals FRONt2
Select channel 2
READ?
Channel 2 measurement
You can determine which input channel is active with the query:
ROUTe:TERMinals?
The query returns either FRON1 or FRON2.
Chapter 4 Remote Interface Reference
Selecting the Input Channel
140
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