Keysight3000 sample rate settings

[petrsocha]

Keysight 3000 series oscilloscope doesn't allow user to directly set the sample rate. The sample rate, thus the number of samples per trace, is set automatically by oscilloscope in accordance to the selected timebase.

However, only a subset of power samples (from the beggining of the trace) may be transferred from the oscilloscope.

Given this, the number of samples per trace could be set: the driver may heuristically select larger timebase than requested, and download only the requested part of the acquired power trace.