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Features and Functions 2

34980A User’s Guide 45

• At the end of the scan, the last channel that was scanned will be

opened (as well as any Analog Bus relays used during the scan).

Any channels that were opened during the scan will remain open at

the completion of the scan.

• If you abort a scan that is running, the instrument will terminate any

reading in progress (readings are not cleared from memory). If a scan

is in progress when the command is received, the scan will not be

completed and you cannot resume the scan from where it left off.

Note that if you initiate a new scan, all readings are cleared from memory.

• You can use either the internal DMM or an external instrument to make

measurements of your configured channels. However, the 34980A allows

only one scan list at a time; you cannot scan some channels using the

internal DMM and others using an external instrument. Readings are

stored in 34980A memory only when the internal DMM is used.

• The Monitor mode is automatically enabled on all channels that are

part of the active scan list (see “Monitor Mode” on page 63).

• The present scan list is stored in volatile memory and will be lost when

power is turned off or after a Factory Reset (

*RST command).

Adding Channels to the Scan List

Before you can initiate a scan, you must set up a scan list to include all

desired multiplexer or digital channels. Channels which are not in the

scan list are skipped during the scan. By default, the instrument scans the

list of channels in ascending order from slot 1 through slot 8 (channels

are reordered as needed).

To Build a Scan List From the Front Panel

• To add the active channel to the scan list, press Channel (Configure).

Then select the function, range, resolution, and other parameters for

this channel. Then add the channel to the scan list by selecting:

SCAN THIS CHANNEL? > YES

• To remove the active channel from the scan list, select:

SCAN THIS CHANNEL? > NO

• To remove all channels from the scan list, select:

Scan (Configure) > CLEAR SCAN LIST? > YES

Agilent Technologies 34980A User Manual

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