Model 2701 User’s Manual Scanning 7-31
Examples:
ROUT:SCAN:TSO IMM ’ Start scan when it is enabled and
triggered.
ROUT:SCAN:TSO HLIM1,LLIM1 ’ Enable high limits 1 and low limits 1.
Note that any reached limit will start the scan.
c. 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
automatically become the monitor channel.
If the <clist> has more than one channel, error -223 (too much data) occurs and the
command is not executed.
d. 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.
e. 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
number 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.
Continuous initiation must be disabled in order to set the sample counter >1 (see
Reference c).
f. INITiate:CONTinuous, INITiate and READ? — In order to initiate a single scan
cycle using INITiate or READ?, continuous initiation must be disabled. If you send
INIT or READ? with continuous initiation enabled, error -213 (Init ignored) will
occur.
You cannot use READ? or INITiate if sample count >1 AND there are readings
stored in the buffer by the TRAC command or by front panel data store operation
(error -225, out of memory). Either set the sample count to one or clear the buffer
(TRACe:CLEar).
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