The Stability Application - Keysight N7744A User Manual

The Stability Application

Keysight N774x Series
•
When LOOP = n>1, then upon completion of a logging measurement,
another is started and the results are written in rotation to the two
buffers (first to buffer A, then buffer B, then buffer A, and so on).
This is repeated until n logging measurements have been performed.
For example, if n=2, both buffers are filled, and you can upload a
total of 2M samples for the channel.
You can also use input triggers to begin individual loops or to begin
multiple loops with an initial trigger.
The "Index" value is updated to indicate that data from each LOOP
is available for readout.
The Stability Application logs a series of power measurements for a
number of power meter ports.
Figure 42 Example Stability Application
The Stability application differs from the "The Logging Application"
because you set the averaging time, the total time, and the period time
after which each new measurement is started. Period time must be
greater than or equal to the averaging time you set.
This leaves the following two possibilities:
•
The averaging time is less than the period time, there is a dwell time
between the commencement of each power measurement, as shown
in the figure, above.
•
The averaging time is equal to the period time, all power
measuremant are performed without any dwell time.
Power Meter Applications
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