HP 34970A User Manual page 85

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 80), 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 82), 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 83), the scan count sets the
number of external trigger pulses that will be accepted before
terminating the scan.
During an Alarm Scan (see page 84), 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.
Front-Panel Operation:
00020 SCANS
The default is CONTINUOUS . To set the count to a value between
1 and 50,000 scans, turn the knob clockwise and enter a number.
Remote Interface Operation:
TRIG:COUNT 20
Note: To configure a continuous scan, send TRIG:COUNT INFINITY.
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