开云体育

Carl, maybe I'm off base, but correct me if I'm going down the wrong rabbit hole.?

The SDRPlay and Airspy SDRs can and do scan either 2.0 or 10 MHz.? However, on either end, there is a 1 MHz falloff in response.? So with a 10 MHz setting, you get only 8 MHz of useful data in the plots.??

For example, I presently have a 3-element home brew Yagi pointing straight upward to catch CYG and CASS on 144.096 MHz on a drift scan.? I'm operating an AirSpy Discovery HF+ on the PC using SDR Console.? While it will not do a sweep of 2.0 or 10 MHz, its maximum sweep is ±96 MHz.? Here is a screen grab which I just took:

Note the fall-off on each end of the sweep.? While it posts ± 96 kHs sweep, the bottom and top of the sweep fall off the lower and upper of 40 kHz each in response, so the useful data window is only 112 kHz wide.

So with the SDRPlay and the AirSpy offerings, your useful data window is less than "advertised".? Set for a 10 MHz sweep which I see in your images, the useful window is only 8 MHz wide.?

Dave - W?LEV

?