Keysight Technologies N6700C Serie Guide D'utilisation page 143

4 Operating the Power System
External Data Logging
Data Logging Functions
Select the Measurement Function and Range
Specify the Integration Period
Select the Elog Trigger Source
Initiate and Trigger the Elog
Periodically Retrieve the Data
Terminate the Elog
Data Logging Functions
The external data logging function can only be programmed using SCPI commands.
The Keysight N6700C models have an "external" data logging function (Elog) that lets you
continuously log voltage and current measurements. Data logging is external to the instrument
because it can only be implemented using SCPI commands. Voltage and current measurement data is
temporarily stored in a FIFO (first-in, first-out) buffer located in the instrument. However, this buffer is
only large enough to hold about 20 seconds of accumulated measurements. This means that you
must periodically empty the internal buffer to an external storage device; otherwise the data in the
buffer will be overwritten.
The following table details the various data logging functions.
Function Description
Data Storage Buffers measurements for about 20 seconds and requires that the computer periodically reads measurements to
prevent the internal buffer from overflowing. The computer needs to provide the external data storage.
Measurement Resources Run independently on each output. Some outputs can be running an external data log, while the remaining out-
puts can be used in front panel control or used for other SCPI functions.
Measurement If a power module has only one measurement converter, then either voltage or current, but not both, can be
Functions logged.
Integration Period Minimum integration period is 102.4 microseconds for one parameter with data format set to REAL. During the
specified integration period, the samples are averaged, and min and max values are tracked.
Data viewing No front panel view or control. Data must be collected and viewed externally.
Select the Measurement Function and Range
The following commands select a measurement function:
142 Keysight N6700C Series User's Guide