Power Sensor Remote Operation 1
U2000 Series Programming Guide 33
For example, with a filter length of 4 and SENS[1]:MRATe set to NORMal,
approximately 5 readings/sec is calculated by the power sensor.
Output Format
The power sensor has two output formats for measurement results: ASCii and
REAL. These formats are selected using the FORMat command. When FORMat is
set to REAL, the returned result is in IEEE 754 floating- point format (note
that the byte order can be changed using FORMat:BORDer) plus <LF> as an end
sentinel of the block.
The REAL format is likely to be required only for FAST mode as it reduces the
amount of bus traffic.
Units
The power sensor can output results in either linear or log units. The internal
units are linear, therefore optimal performance is achieved when the results
output are also in linear units (since the overhead of performing a log function
is removed).
Command Used
In Free Run mode, FETCh? must be used to return a result.
In other trigger modes, there are a number of commands which can be used,
for example, MEASure?, READ?, FETCh? Note that the MEAS? and READ?
commands are compound commands—they perform a combination of other
lower level commands. Typically, the best speed performance is achieved using
the low level commands directly.
Trigger Count
To get the fastest measurement speed TRIG:COUNT must be set to return
multiple measurements for each FETCh command. For average only
measurements a count of 4 is required, however, 10 is recommended.
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