User manual

IEEE-488 Reference
4-94 2001-900-01 Rev. K / August 2010
4.18.4 :SCAN commands
[INTernal] <list>
:ROUTe:SCAN:[INTernal] <list> Define internal scan list
Parameter <list> = (@ scanlist)
where; scanlist is the specified list of channels (1 to 10) to be scanned.
Format :rout:scan <list>
Defaults Power-up Saved power-on setup
*RST All 10 channels in scan list
:SYSTem:PRESet All 10 channels in scan list
Query :INTernal]? Query programmed scan list
Short-form format: :rout:scan?
Response message: Currently programmed scan list. For example:
(@ 1,2,3,4,5,6,7,8,9,10)
Description This command is used to define the scan list for the internal Model 2001-SCAN scanner card.
The scan list can contain 2 to 10 channels. The following examples demonstrate the various
forms for expressing a scan list:
list = (@ 2,4,6) Channels separated by commas (,).
= (@ 1:8) Range of channels (1 though 8). Range limits separated by a colon (:).
= (@ 1:5,7) Range entry and single entry separated by a comma.
Only the channels specified in the scan list will be scanned. The order that channels are listed
in the scan list is not important. The instrument will automatically re-arrange the scan list so
that the channels are scanned in numeric order starting with the lowest channel number. Note
that channels 5 and 10 of the Model 2001-SCAN are designed for high speed.
Important Note: When this command is sent, it will automatically select the internal scanner
(see :ROUTe:SCAN:LSELect INTernal). This means that if the instrument is currently making
measurements, the scan will start as soon as this command is used to define the scan list. To
prevent this, you can first place the instrument in idle and then define the scan list. Sending the
following two commands (in the order shown) will place the instrument in idle:
:INITiate:CONTinuous OFF
:ABORt
With the instrument in idle, you can then define the scan list without starting the scan. When
ready, you can start the scan by sending either of the two following commands.
:INITiate or :INITiate:CONTinuous ON
Before performing an internal scan (Model 2001 SCAN), be sure that the instrument is appro-
priately configured for the measurements. The :SCAN[:INTernal]:FUNCtion command can be
used to set each channel for a specific measurement function. Also, if you want the instrument
to perform a particular number of scans, make sure to configure the Trigger Model appropriate-
ly (see Trigger Subsystem).