Hello Nigel,
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I'm as mystified as you are, but I would be surprised if a generic driver would do that sort of pre-emphasis processing (I could be wrong). Have you tried simply listening to the audio coming from your sound card (without going through Quisk)?? I'm wondering if the raw sound might give a clue as to the origin of the bump.? Perhaps try comparing the sound from your Line2 USB with your UFO202? Good luck! -- Ben, AC2YD -- On 12/3/22 21:42, Nigel Johnson MIEEE via groups.io wrote:
OK, I brought the box with the softrock 40 ensemble and raspberry pi down from the roof and hooked it up to the service monitor.? ?I can clearly see there are no images of any signal that I inject at normal levels playing with it around 7.12 MHz.? The only way I can see images is if I turn the service monitor's attenuator way up beyond any signals that I would ever receive, hundreds of mV of signal. It clearly shows and demodulates AM with a few uV of RF. When I had it up on the roof I could clearly demodulate WWV, CHU, some broadcast stations and 40m CW signals, so I know it is working. |