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Originally Posted by tripelo
Being a double sideband modulator, doesn't the NTSC video carrier show up twice in the spectrum?
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Yes, it does; that is why you can only use every other channel when adding a channel. But, all I have to do is tune my SLM or SDR to the video carrier frequency of the channel transmitted by the modulator.
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Doesn't the Thor Petit also cover UHF?
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Yes, it does, but I didn't have it at first because it was so expensive. I waited until it went on sale, which it is also now again.
The video carrier is more precise; the ATSC signal is much wider and not always flat. So, where do you measure the ATSC Carrier when it isn't flat? My SLM takes an average of many readings when it scans the whole ATSC channel, but can measure the NTSC video carrier more exactly. With the SDR, I can select the measurement frequency at any place on the ATSC channel.
