We spent several weeks in lab testing. Field test are in progress as we speak. We went even beyond those scenarios once we saw how much margin we had with those multipath ensembles. With the Sinclair scenario quoted 10 Hz flat fading and 10 Hz dynamics on those strongest echoes, and in the ATSC Grand Alliance echoes, we have gone as high as 20 Hz on dynamic multipath. Quite honestly we are still trying to characterize the whole performance space of echo amplitude and dynamic phase rate to explore the extreme limits of what this thing can do.
Different people define that different ways.
But the stuff they are doing in Europe in trying to demonstrate reception at 200 MPH down the Autobahn. That is more challenging for the ATSC system because we don't have the luxury of falling back to some very low data rate. The 20Hz dynamic is a lot more than leafs blowing in the wind or people walking around the room. Like I say, it easily satisfies pedestrian mobility, but falls something short of high speed freeway traffic. When you say the same, we have a lot of variables there that relates not only to the type of terrain you need to deal with, but the factor in power and coverage from the transmitter.