A discussion of how changing these values might affect the data appears at the end of this document. The default setting is 10,000. The units output from sparo depend on preamp gain. Chops per frame and chopper frequency are not supposed to have any effect on the average signal level. Normally, we operate at a chopping frequency of 3.1 Hz, with a preamp gain of 10,000, and 2 chops per frame.
Global attenuation is a parameter which only affects the strip chart.
It is normally 1000. Integ's output is independent of the number of frames in each integration. It takes a straight average of the frame rate data and then adds the four nodpair positions together using the proper sign for each left and right beam integration. This is a convenience so as to not carry around such large numbers. Thus, a peak of around 1 corresponds to an signal of 100,000 integ-units.