3
Features and Functions
166
Keysight 34980A Mainframe User’s Guide
Non-Sequential Scanning
By default, the instrument scans the list of channels in ascending order from slot 1
through slot 8 (channels are reordered as needed). If your application requires
non-ordered scanning of the channels in the present scan list, you can use the
non-sequential
scanning mode.
This feature is available from the remote interface only.
– The scanning mode applies to the entire mainframe and cannot be selectively
used on individual modules.
– When sequential scanning is enabled (default), the channels in the scan list
are placed in ascending order from slot 1 through slot 8. Duplicate channels
are not allowed. For example, (@2001,1003,1001,1003) will be interpreted as
(@1001,1003,2001).
– When sequential scanning is disabled (OFF), the channels remain in the order
presented in the scan list (see exception below). Multiple occurrences of the
same channel are allowed. For example, (@2001,2001,2001) and
(@3010,1003,1001,1005) are valid and the channels will be scanned in the
order presented.
– When you specify a
range
of channels in the scan list, the channels are always
sorted in ascending order, regardless of the scan order setting. Therefore,
(@1009:1001) will always be interpreted as 1001, 1002, 1003, etc.
– If you define a scan list with the sequential mode enabled and later disable the
mode, the scan list will not be reordered; however, the scan list will be treated
as a non-sequential list thereafter.
– If you have defined a scan list with the sequential mode disabled (OFF) and
later enable the mode, the channels will be reordered.
– Non-sequential scan lists are not stored as part of the instrument state by the
*SAV
command; in this case, the ordered mode will be enabled and the scan
list will be empty when the instrument state is restored (
*RCL
command).
– The scan order setting is stored in volatile memory and the ordered mode will
be enabled when power is turned off or after a Factory Reset (
*RST
command).
Remote Interface Operation:
ROUTe:SCAN:ORDered {OFF|ON}
