HP 34970A manual ∙ Sctxt

Chapter 4 Features and Functions

Scanning

∙ Sctxt” :

CH DELAY AUTO

∙exx Vxytvx bxt”: The following command enables an automatic channel delay on channel 01.

ROUT:CHAN:DELAY:AUTO ON,(@101)

Selecting a specific channel delay using the ROUTe:CHANnel:DELay command disables the automatic channel delay.

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During a scan, the instrument automatically adds a time stamp to all readings and stores them in non-volatile memory. Readings are stored only during a scan. You can read the contents of memory at any time, even during a scan.

∙You can store up to 50,000 readings in non-volatile memory during a scan. From the front panel, you can view the last 100 readings and all of the readings are available from the remote interface. If 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).

∙Each time you start a new scan, the instrument clears all readings (including alarm data) stored in reading memory from the previous scan. Therefore, the contents of memory are always from the most recent scan.

∙The instrument clears all readings in memory after a Factory Reset (*RST command) or Instrument Preset (SYSTem:PRESet command).

Reading memory ” cleared when you read it.

∙While a scan is running, the instrument automatically stores the minimum and maximum readings and calculates the average for each channel. You can read these values at any time, even during a scan.

∙Each reading is stored with measurement units, time stamp, channel number, and alarm status information. From the remote interface, you can specify which information you want returned with the readings (from the front panel, all of the information is available for viewing). For more information, see “Reading Format” on page 87.

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