HP 34970A User Manual download pdf (Page 79)

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101

Scan Interval

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.

• 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.

Interval Scanning In this configuration, you control the frequency of

scan sweeps by selecting a wait period from the start of one sweep to the

start of the next sweep (called the scan-to-scan interval). The count-

down time is shown on the front-panel display between one scan sweep

and the start of the next sweep. If the scan interval is less than the time

required to measure all channels in the scan list, the instrument will

scan continuously, as fast as possible (no error is generated).

Scan List (1 sweep)

Scan-to-Scan Interval

(0 to 99:59:59 hours)

Scan Count

(1 to 50,000 scans, or continuous)

Chapter 4 Features and Functions

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HP 34970A User Manual Page 79

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