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102
Chapter 4 Features and Functions
Scanning
Scan Count
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.
• Select a scan count between 1 to 50,000 scan sweeps, or continuous.
• During an Interval Scan (
see page 96 ), the scan count sets the number
of times the instrument will sweep through the scan list and
therefore determines the overall duration of the scan.
• During a Scan Once operation ( see page 98 ), the scan count sets the
number of front-panel key presses or scan trigger commands that will
be accepted before terminating the scan.
• During an External Scan ( see page 99 ), the scan count sets the
number of external trigger pulses that will be accepted before
terminating the scan.
• During an Alarm Scan ( see page 100 ), the scan count sets the number
of alarms that will be allowed before terminating the scan.
• You can store up to 50,000 readings in non-volatile memory during a
scan. If you set a continuous scan and memory overflows (the
MEM
annunciator will turn on), a status register bit is set and new
readings will overwrite the first readings stored (the most recent
readings are always preserved).
• The
MEASure?
and
CONFigure
commands automatically set the scan
count to 1.
• From the front panel, a Factory Reset ( Sto/Rcl menu) sets the scan
count to continuous. From the remote interface, a Factory Reset
(
*RST
command) sets the scan count to 1 sweep.
34970A Refresh UG.book Page 102 Wednesday, February 17, 2010 12:34 PM