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 True
volt
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 con-
nection 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 fol-
lowing 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 dis-
crete 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.
Keysight True
volt
Series Operating and Service Guide
47
Features and Functions
