Agilent Technologies Agilent 34980A, User Manual

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Features and Functions
2
34980A User’s Guide 67
•
You can specify the number of times the instrument will sweep through
the scan list. When the specified number of sweeps have occurred, the
scan stops. For more information, refer to
“Sweep Count” on page 53.
• An externally- controlled scan can also include a read of a digital port
or a read of the totalizer count on the digital modules. When the
channel advance reaches the first digital channel, the instrument scans
through all of the digital channels in that slot (only one channel
advance signal is required).
•
You can configure the list of channels for 4- wire external scanning
without the internal DMM. When enabled, the instrument automatically
pairs channel
n in Bank 1 with channel n+20 in Bank 2 (34921A,
34923A, 34925A) or n+35 (34922A, 34924A) to provide the source and
sense connections. For example, make the source connections to the HI
and LO terminals on channel 2 in Bank 1 and the sense connections to
the HI and LO terminals on channel 22 (or 37) in Bank 2.
Front Panel Operation:
To select the channel advance source, choose the
following items.
Scan (Configure) > ADVANCE CHANNEL > AUTO|EXT|MANUAL
To initiate the scan and store all readings in memory, press the
Scan (Measure)
key.
To configure the instrument for 4- wire external scanning, choose the
following menu item.
Channel (Configure) > FOUR WIRE > OFF|ON
Remote Interface Operation:
The following program segment configures the
instrument for an externally- controlled scan.
To configure the instrument for 4- wire external scanning, send the
following command.
ROUTe:CHANnel:FWIRe {OFF|ON}, (@<ch_list>)
INST:DMM OFF
ROUT:SCAN (@1001:1020)
TRIG:SOUR IMM
TRIG:COUN 5
ROUT:CHAN:ADV:SOUR EXT
INIT
Disable internal DMM
Configure scan list
Set trigger source
Set trigger count
Set channel advance source
Initiate the scan