Digitizing
The digitizing feature (applies only to the 34465A/70A with the DIG option) 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):
See
for a tutorial on digitizing and more information on samples rates vs. input fre-
quencies.
The DMM digitizes by sampling the input signal using either the DCV function (default) or the DCI function
with autorange and autozero disabled.
Loss of data possible - local to remote transition clears instrument memory:
When
data logging or digitizing
to memory
, if you access the instrument from remote (send a SCPI
or common command)* and then return to local (by pressing
[Local]
), the readings in
memory are cleared and the instrument returns to Continuous mode.
For data logging only, you can prevent this situation by data logging to a file instead of to
memory (see
for details). You can also prevent this from happening for data
logging or digitizing by taking steps to keep the instrument from being accessed from
remote. To prevent remote access, you may want to disconnect the LAN, GPIB, and USB
interface cables from the instrument before starting the measurements. To prevent remote
access via LAN, you can connect the instrument behind a router to minimize the possibility of
remote access. You can also disable the various I/O interfaces from the front panel menus
under
[Utility]
>
I/O Config
.
To view the status of a data logging or digitizing operation remotely, use the instrument’s
. The Web User Interface monitor does not set the instrument to remote.
Features and Functions
86
Keysight True
volt
Series Operating and Service Guide
