Selecting The Input Channel - Agilent Technologies 34420A User Manual

Chapter 4 Remote Interface Reference

Selecting the Input Channel

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)
CONFigure:VOLTage:DC MAX, MAX, (@FRONt2)
In the SENSe subsystem, the keyword is modified to select the input
channel. For example,
SENSe1:VOLTage:RANGe 10
SENSe2:VOLTage:RANGe 10
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
SENSe2:VOLTage:RANGe .1
ROUTe:TERMinals FRONt1
READ?
ROUTe:TERMinals FRONt2
READ?
You can determine which input channel is active with the query:
ROUTe:TERMinals?
The query returns either FRON1 or FRON2.
140
Channel 1
Channel 2
Channel 1 range setting
Channel 2 range setting
Channel 1 range 10 V
Channel 2 range 100 mV
Select channel 1
Channel 1 measurement
Select channel 2
Channel 2 measurement