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Power can only be measured on power modules with simultaneous measurement capability (refer to
Model
Differences).
If a FETCh query is sent before the measurement is finished, the response will be delayed until the
measurement trigger occurs and the acquisition completes. You can test the MEAS_active bit in the
operation status register to know when the measurement trigger system has returned to the idle
state. To query the MEAS_active bit (bit 5):
STAT:OPER:COND?(@1)
If a bit value of 32 is returned in the query, the MEAS_active bit is true, and the measurement is NOT
complete. When the MEAS_active bit is false, you can retrieve the measurement. Refer to Status
Tutorial in the Operating and Service Guide document for more information.
Use Array queries to return all data from the measurement buffer.
FETC:ARR:CURR?(@1)
FETC:ARR:VOLT?(@1)
FETC:ARR:POW?(@1)
You can specify the format of the array data. Refer to
more information
ASCII data (the default format) is returned as comma-separated ASCII numeric voltage or current
data terminated by a newline. An ASCII query can only fetch data from one channel at a time.
Binary data is returned as a comma-separated list of data for each channel requested. The data for
each channel is a definite length binary block, with the byte order specified by the BORDer command.
Each FETCh command also has a corresponding MEASure command. Measure commands initiate,
trigger, and return the data all in one step. Each measurement command overwrites previous data.
Refer to Measure commands in the Operating and Service Guide document for more information.
Measurement System Bandwidth
The following applies when making dynamic current measurements; not when making
static (or DC) measurements. This information does not apply to models N678xA SMU.
For N678xA bandwidth information, refer to the
Family Specifications
The measurement bandwidth of the power analyzer is dependent on the following factors:
Whether voltage or current is being measured.
l
Whether dynamic current correction has been turned on or off.
l
The analog bandwidth of the power module.
l
The following table documents the bandwidth for the above-mentioned factors.
Keysight N6705C User's Guide
6 Advanced Source, Measurement, and Control
Guide.
Measurement Data Formats
Keysight N6700 Modular Power System
for
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