Keysight E4980A User Manual page 505

Scanner Interface
How to Use the Scanner Interface Board
Table F-13 Example of Channel Selection
/CH0
1
/CH0 to /CH7 are negative true, so 1 indicates LOW and 0 indicates HIGH
in the above table.
/CH_VALID makes the E4980A/AL acknowledge that the channel number is
valid. The /CH_VALID signal must be set to LOW for the E4980A/AL to set the
channel number set with /CH0 to /CH7 signals.
In the case of channel number selection using the interface connector,
when the E4980A/AL is triggered, or when the E4980A/AL starts a
correction data measurement (for example, when the MEAS OPEN softkey
is pressed), the E4980A/AL acknowledges the channel number. Therefore,
even if the /CH0 to /CH7 signals and the /CH_VALID signal are sent, the
E4980A/AL will not set the channel number until it is triggered or until it
starts a correction data measurement.
Channel Selection using GPIB
The channel number used to select the correction data can be set using the
:CORR:USE command. The syntax of this command is:
:CORRection:USE[:CHANnel] <channel number>
Where,
<channel number>:
For example, the sample code to set the channel number to 20 is as follows.
rtn = viVPrintf(AgtE4980A/AL, ":CORR:METH MULT" + vbLf, 0)
rtn = viVPrintf(AgtE4980A/AL, ":CORR:USE 20" + vbLf, 0)
In case of the channel number selection using the :CORR:USE command,
the E4980A/AL acknowledges the channel number when it receives this
command. Therefore, if the ":CORR:USE 10" command is sent via GPIB, the
E4980A/AL will set the channel number to 10 when it receives the
command.
Monitoring Current Channel
You can monitor the current channel number selected for correction on the
CORRECTION page and the MEAS DISPLAY page. The "CH" field on these
pages indicates the current channel selected for correction.
Keysight E4980A/AL User's Guide
/CH1 /CH2 /CH3
1 1 1
/CH4 /CH5 /CH6
1 1 1
0 to 127 (integer)
/CH7 Channel
Number
0 127
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