ATSC video in 1GHz+

[ChrisW6ATV]

Originally Posted by lnx64

I just didn't know hams were using ATSC now. I thought they still used NTSC.

I am a long-time operator of TV over ham radio (ATV, amateur television). One of the joys of ham radio is that we are not limited to specific standards for most of our transmissions, so in the case of TV signals, hams have used NTSC (AM-mode), as well as FM-mode NTSC, and several digital modes. ATSC is pretty rare in the ATV world, partly because transmitting equipment is expensive and/or hard to obtain. Other digital modes (DVB-S, DVB-T, even QAM "digital cable" mode but put on the air) are more common.

If that 12-MHz ATSC signal was indeed an ATV station, the bandwidth was probably not intentional; it may be a type of intermodulation problem that happens in the station's amplifier(s).