Did you use ATSC or QAM?

ATSC
At the TV end I treated the signal like an off air channel.
Cable box 1 for example was set to channel 10.1

??? SO you are installing 2-way splitters behind ever TV? Because that is the ONLY way what you are describing can work. Since the M3B can not tune a OTA signal.

I hate to have to point out a technicality, but this IS a technical discussion:
So you use the PVI modulator in ATSC mode but you have cable boxes, which receive QAM. Hmmm. Interesting.

One has nothing to do with the other.
QAM is coming in on the coax to the cable boxes. He can choose to use QAM or ATSC for his own generated cable system in the house. He chose ATSC, which would allow the mixing of OTA signals if desired.

Then TVs still exist that allow the selection of both modulation methods. The TVs I know about, at least for the last few years, can't change from receiving ASTC to receiving QAM, or vice versa, without deselecting the current mode and doing a complete channel scan. "Let's check that single QAM channel!" "Okay, I've got twenty minutes!"

I read that as QAM feed is direct to cable box. Cable box output is then modulated in ASTC.

Sometimes it pays to ensure you have fully understood the answer before launching into technical inadequacies your perceived answer throws up, especially when deciding to add sarcasm into the mix....

You are trolling now Ernie.
It was very clear that the generated house cable system is only 1 type = either QAM or ATSC. He chose ATSC.

This was the first mention of his modulation method.

Let me tell you what this said to me.
First, he tells us what modulation scheme he's using, then he says what he does at the TV end. Then, presumably still talking about the TV end, he mentions a cable box... which is presumably also at the TV end.

Hell, maybe he was just doing what we all do: we clearly envision what we're talking about but we don't express details well. Maybe he means that he takes the OUTPUT of the cable box and ATSC MODULATES it as Channel 10.1. That would make sense but if that's what he meant, it wasn't clear.


Yeah, so like I said. I just didn't see it.

I don't see how to ensure that. You have to take what you understand and deal with things at that level.

Thanks for the clarification.

What is the saying about wrestling a pig in the mud...

All that was asked is if I was using QAM or ATSC.

"2 Cable Boxes, DirecTV and Apple TV are the feeds to be shared."
is something I also had in my post.

Nothing about "also" having cable boxes at each TV. So I don't think there should have been any confusion.