How to Place Dagr in Continues Mode

Continuous, Data Log, and Digitize Modes

The 34465A/70A can operate in the continuous, data log, or digitize mode as described below.

The 34460A/61A DMMs always operate in the continuous mode -data log and digitize modes are not available on these models.

Continuous Mode

Continuous mode is the default mode for all Truevolt DMMs. With the factory default settings, the DMM continuously makes DCV measurements with autorange and autozero on, NPLC set to 10 PLCs, etc. (see factory defaults for details).

Data Log Mode

The Data Log mode is standard on the 34465A and 34470A only, as is available only from the DMM's front panel. Data Log mode provides a front–panel user interface that allows you to set up data logging into the instrument's non–volatile memory, or to internal/external file(s), without programming, and without a connection to a computer. Once you have finished collecting data, you can view it from the front panel, or you can transfer the data to your computer. Data Log mode allows you to log a specified number of readings, or readings acquired for a specified period of time, to instrument memory or to internal or external data files.

To select Data Log mode, press [Acquire] Acquire > Data Log. You can then select the Sample Interval (time between measurements - for example, 500 mS), Duration as either an amount of Time or a number of Readings, whether to Start after a Delay or at a specific Time of Day, and whether to Log to Memory or Log to File(s). After configuring the data logging parameters, press [Run/Stop]. Data logging will begin following the specified Delay or at the specified Time of Day.

Digitize Mode

The digitize mode applies only to the 34465A/70A with the DIG option, and as is available only from the DMM's front panel. The digitized mode provides a front–panel user interface that allows you to quickly set up digitized measurements.

Digitizing is the process of converting a continuous analog signal, such as a sine wave, into a series of discrete samples (readings). The figure below shows the result of digitizing a sine wave. This chapter discusses the various ways to digitize signals. The importance of the sampling rate, and how to use level triggering.

Data Log and Digitize Mode Default Settings

On entering data log or digitize mode, the DMM configures these settings:

• Trigger count set to 1 (trigger count is normally infinite when in Local and is not settable from the front panel).
• Secondary measurements are turned off.
• Math smoothing is turned off.
• Statistics are cleared.
• Histogram is cleared.
• Trend chart is changed from the continuous, bucketized mode, to simple data graph.

Additional Data Log Default Settings

On entering data log mode, the DMM configures these settings::

• Trigger source is set to auto.
• Trigger delay is set to auto.
• Pretrigger count is set to zero.
• Samples per trigger is set according to the data log duration (time or samples).
• Sample timer is put in timer (not immediate) mode and sample time is set according to the data log sample interval.

Additional Digitize Default Settings

On entering digitize mode, the DMM configures these settings:

• If trigger source is set to manual it is changed to auto. (external and level remain as is.)
• Limits mode is turned off.
• Scaling is turned off.
• Statistic and histogram are put in post-processing mode (computed after digitize is complete).
• On the selected function (DCV or DCI) and for the new function if changed :
• Autorange is turned off.
• Autozero is turned off.
• NPLC and aperture are set to their minimum values.
• If trigger source is external or level, the pretrigger count is set to the digitize pretrigger count setting (default of 0).
• Samples per trigger is set according to the digitize duration (time or samples).
• Sample timer is put in timer (not immediate) mode and Sample timer is set according to the digitize sample rate or sample interval.
• Trend Chart mode is changed to bucketized when data logging to a file.
• On return to Continuous mode, settings are left as done in data log or digitize mode except:
• Sample source is set to immediate.
• Pretrigger count is set to 0.
• Samples per trigger is set to 1.
• Trigger count is set to infinite.

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Source: https://rfmw.em.keysight.com/bihelpfiles/Truevolt/WebHelp/US/Content/__F_Tutorial/Continuous,%20Data%20Log,%20and%20Digitize%20Modes.htm

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