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7-32
b.
c.
d.
e.
(@101:110)
Now assume the scan is returned to DCV function as follows:
SENS:FUNC 'VOLT',(@101:120)
The above command sets channels 101 through 120 for DCV. However, it will
NOT affect the scan list. ROUT:SCAN? still returns a 10 channel scan list:
(@101:110)
The following command will set the scan list for 20 channels:
ROUT:SCAN (@101:120)
ROUTe:SCAN:TSOurce <list>
<list> = IMMediate
= HLIMit1, HLIMit2, LLIMit1, LLIMit2
As with front panel operation, the scan can start immediately when it is enabled
and triggered OR it can be started by a reached reading limit detected by the moni-
tor channel. For immediate, the IMMediate command must be the only parameter
in the list. To use reading limits, each limit must be separated by a comma (,).
Examples:
ROUT:SCAN:TSO IMM
ROUT:SCAN:TSO HLIM1,LLIM1 ' Enable high limits 1 and low limits 1.
Note that any reached limit will start the scan.
ROUTe:MONitor <clist> — The channel that you specify as the monitor must be a
channel that is in the scan list. If it is not, the first channel in the scan list will auto-
matically become the monitor channel.
If the <clist> has more than one channel, error -223 (too much data) occurs and the
command is not executed.
ROUTe:MONitor:POINts — Use this command to specify the number of channels
to scan each time the monitor scan is triggered to start. For example, assume the
monitor scan list has 10 channels. To scan that list once, send ROUT:MON:POIN
10. To scan that list twice, use parameter value 20. For three scans, send parameter
value 30, and so on.
SAMPle:COUNt and TRIGger:COUNt — Sample count specifies the number of
readings to scan and store in the buffer, while the trigger count specifies the num-
ber of scans to perform.
If the sample count is greater than the number of channels in the scan list (scan list
length), operation wraps around to the beginning of the scan list and continues. For
example, assume the scan list is made up of channels 101, 102, and 103, and the
sample count is set to 4. After channels 101, 102, and 103 are scanned, operation
loops around to scan channel 101 again. The first and last readings in the buffer
will be channel 101.
When performing multiple scans (trigger count >1), sample readings overwrite the
readings stored for the previous scan.
Model 2790 SourceMeter
' Start scan when it is enabled and
triggered.
®
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