HP 34970A manual Scanning Overview

Chapter 5 Remote Interface Reference

Scanning Overview

∙You can use either the internal DMM or an external DMM to make measurements of your configured channels. However, the instrument allows only one scan list at a time; you cannot scan some channels

using the internal DMM and others using an external DMM.

Readings are stored in HP 34970A memory when the internal DMM is used.

∙If the internal DMM is installed and enabled, the instrument will automatically use it for scanning. For externally-controlled scans, you must either remove the internal DMM from the HP 34970A or disable it (see “Internal DMM Disable” on page 145).

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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. You can also program a time delay between channels in the scan list.

∙You can manually control a scan by repeatedly pressing from

	the front panel.	5
∙	You can start a scan by sending a software command from the

remote interface (MEASure? or INITiate command).

∙ You can start a scan when an external TTL trigger pulse is received.

∙ You can start a scan when an alarm event is logged on the channel being monitored.

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