Operating the Power System 4
Keysight N6700 User’s Guide 91
External Data Logging
The external data log function is only available on mainframes with firmware
revision D.01.09 and up. It cannot be programmed from the front panel.
The power system has an external data logger (ELOG) function that lets
you log voltage and current measurements from all four outputs directly
to an internal FIFO (first-in, first-out) buffer. Note that this buffer is only
large enough to hold about 20 seconds of accumulated measurements.
The following table lists this, along with some other restrictions that
apply to the external data logger.
Data viewing No front panel view or front panel control. Data must be exported to a
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 data storage function.
Measurement
resources
Run independently on each output. Some outputs can be running an external
data log, while the remaining outputs can be used in front panel control or used
for other SCPI functions.
Measurement
functions
If a power module has only one measurement converter, then either voltage or
current, but not both, can be logged.
Up to 102.4 microseconds for one parameter with data format set to real.
Briefly, to make external data log measurements:
Select the measurement functions and ranges.
Specify the measurement integration period.
Select the trigger source.
Trigger the data logger.
Retrieve the data log measurement.
The external data logger function cannot be programmed from the front
panel.
Select the Measurement Functions and Ranges
The following commands select a measurement function:
Not Available
To enable voltage or current measurements:
SENS:ELOG:FUNC:VOLT ON,(@1)
SENS:ELOG:FUNC:CURR ON,(@1)
To enable min/max measurements:
SENS:ELOG:FUNC:VOLT:MINM ON,(@1)
SENS:ELOG:FUNC:CURR:MINM ON,(@1)
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