Keysight DAQ970A Guia Del Usuario página 56

3 Features and Functions
Scanning
The instrument allows you to combine a DMM (either internal or external) with multiplexer channels to create a scan.
During a scan, the instrument connects the DMM to the configured multiplexer channels one at a time and makes a
measurement on each channel.
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 from the scan. The instrument automatically scans the list of
channels in ascending order from slot 1 through slot 3. Measurements are taken only during a scan and only on
those channels which are included in the scan list.
You can store up to 1,000,000 readings in non-volatile memory during a scan. Readings are stored only during a
scan and all readings are automatically time stamped. Each time you start a new scan, the instrument clears all
readings stored in memory from the previous scan. Therefore, all readings currently stored in memory are from the
most recent scan.
You can configure the event or action that controls the onset of each sweep through the scan list (a sweep is one
pass through the scan list):
– You can set the instrument's internal timer to automatically scan at a specific interval as shown below. You can
also program a time delay between channels in the scan list.
– You can manually control a scan by repeatedly pressing [Scan/Start] key from the front panel.
– You can start a scan by sending a software command from the remote interface.
– You can start a scan when an external TTL-compatible trigger pulse is received.
– You can start a scan when an alarm condition is logged on the channel being monitored.
56 Keysight DAQ970A/DAQ973A User's Guide