Brad, when it is used like a stand alone Scanmaster without PL, it will have the same sample rate as the scanmaster because it is limited by the data rate coming thru the the ALDL feed which gives about a sample every 1.5 seconds.
I think it can also be used with the PL. In that case, the Scanmaster updates about 5 times a second as I recall as compared to the 20+ on the PL. Bob said he chose 5 because the eye could not see any faster than that. I would assume that the G does the same.