User`s guide

124 Agilent 34980A Mainframe User’s Guide
3 Features and Functions
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}