External Data Logging - Agilent Technologies N6705 User Manual

6 Advanced Source and Measurement Functions

External Data Logging

NOTE
Function
Data viewing
Data storage
Measurement
resources
Interleaved mode
Logging rate
168
The external Data Logger function is not available if Option 055 has been
ordered.
In addition to the built-in data logger, the DC Power Analyzer 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 the major differences between the built-in and
external data loggers.
Built-in Data Logger
Optimized for viewing the
measurements on the DC Power
Analyzer's display.
Stores the measurements to an
internal file. Can be left unattended
for an extended time and results
can be viewed afterward.
Allocates all the measurement
resources of ALL outputs, even if
data logging is only enabled on
some of the outputs.
Interleaved mode allows the data
logger to log both voltage and
current on power modules that
have only one measurement
converter.
Can log data at up to 20.48
microseconds for one parameter.
Programming the external data logger consists of:
Selecting the measurement functions and ranges.

Specifying the measurement integration period.

Selecting the trigger source.

Triggering the data logger.

Retrieving the data log measurement.

External Data Logger
No front panel view or front panel
control.
Buffers measurements for about 20
seconds and requires that the
computer periodically reads
measurements to prevent the DC
Power Analyzer's buffer from
overflowing. The computer needs to
provide the data storage function.
Runs 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.
Interleaved mode is not available. If a
power module has only one
measurement converter, then either
voltage or current can be logged, but
not both.
Can log data at up to 102.4
microseconds for one parameter with
data format = real.
Model N6705 User's Guide