The MultiWave instrumentation interleaves the measurements
of each axis of each probe during the collection of a set of
waveforms for the sample. The trigger is the rate at which
the sweep channel is incremented. Dividing the sweep
channel by the trigger results in the time offset (on the
order of 10s of microseconds) associated with measurements
of the probe. This information is necessary in order to
normalize the phase associated with the waveforms of the
different probes within a sample.
The accuracy of the 4 MHz clock used to coordinate the data
collection is cited as +/- 0.01%. The accuracy of the
trigger value is dependant on this clock, and therefore can
be assumed to have approximately the same uncertainty.
A real number, either 1920.12 or 117647. In the case of the
probes associated with the low-frequency board, the value is
1920.12. In the case of probes associated with the
high-frequency board, the value is 117647. The units are
cycles per second.