Dynamic Current Measurement Control - Keysight Technologies N6705C Operating And Service Manual

6 Advanced Source, Measurement, and Control
You can also specify how binary data is transferred. This only applies when the FORMat:DATA is set to
REAL
Normal - Binary data is transferred in normal order. The most significant byte is returned first, and the
least significant byte is returned last (big-endian).
Swapped - Binary data is transferred in swapped-byte order. The least significant byte is returned first,
and the most significant byte is returned last (little-endian).
The following command specifies the byte order of the data:
FORM:BORD NORM | SWAP
Use swapped format if you are using a little-endian data processor.

Dynamic Current Measurement Control

This control is used when making dynamic current measurements; it is not required for
static (or dc) measurements. On Models N678xA SMU, N6753A - N6756A, and N6763A -
N6766A, the designs are such that dynamic current correction is not needed and the
control is therefore unavailable.
The power analyzer measures the output current across an internal current monitor. For most power
modules this current monitor is located on the inboard side of the output capacitor.
For static (or dc) measurement applications this measurement method yields accurate
measurements. However, due to the output capacitor C0, when there is a significant and rapid change
in output voltage, the additional output current does not all flow into load RL; some of it flows through
the output capacitor. In this momentary situation the measurement circuit is not only measuring the
output current going into the load, but also the output current flowing through the output capacitor.
Since the load never sees the additional current, this results in an inaccurate output current
measurement.
When the output current is measured and averaged over a number of samples as in the case of static
measurements, the inaccuracy is insignificant. However, with the power analyzer's scope and data
logging functions, which capture thousands of measurement samples per second, this inaccuracy
becomes evident.
212 Keysight N6705C Operating and Service Guide