Not sure what you mean.
Is it the same station and same channel number on both tuners?
Do both tuners lose signal at the same time or do you have different antennas connected to each?
If one tuner loses signal and the other doesn't, disable that channel on the tuner with the issue.
There’s another way, but it’s a bit convoluted. You can create an M3U playlist with re-numbered channels, pointing to the tuner itself. So, for the ABC/10.1 example, and to have it accessed on channel 110, you could create a playlist such as:
#EXTM3U
#EXTINF:-1 channel-id="abc-new" channel-number="110",ABC
http://X.X.X.X:5004/auto/v10.1
Substitute the IP address for your HDHR’s, and then just assign it the guide data for your local ABC. Then when you create your advanced pass, just force it to use channel 110, and it will only pull from that source.
Another option is to use a redirect to Channels own copy of that tuner, something like: http://127.0.0.1:8089/devices/FFFFFFFF/channels/10.1/stream.mpg, where FFFFFFFF is your HDHR’s DeviceID. (Actually, this would probably be a better option, because this way Channels will also note all of the SNR in its logs.)
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Would this allow me to force not only what Receiver to use, but which tuner ON that receiver? I'm noticing my ABC (WKRN) signal is a tad better on the 3.0 tuners (even though the signal is 1.0), than the other 2 tuners that are 1.0 only. What's crazy is that Channels is ignoring the 3.0 tuners unless I call up a 3.0 channel. Those tuners are stronger. So why not use it? It keep defaulting to the 1.0 only tuners.
I'm pretty sure Channels DVR is telling your HDHR4K to use tuner autoselect and the HDHR4K decides which of the 4 tuners to use.
I don't have one, but IIRC from SD's forum, it will use tuners 2 then 3 then 1 then 0 for an ATSC 1.0 source and 0 then 1 for an ATSC 3.0 source.
I also remember reading the HDHR4K numbers ATSC 3.0 channels in the 100's, i.e. 2.1 (ATSC 1.0) and 102.1 (ATSC 3.0).
The 3.0 tuners in the 4K are backwards compatible with 1.0. I've asked them on SD too what I can do to force tune a signal on a receiver.
Correct
It avoids using tuners 0 and 1 for ATSC 1.0 sources in order to keep them free for ATSC 3.0 tune requests.
Is this on Channels side or SD? I really need it to use the 3.0 tuner(s). I'm not using them for anything when General Hospital is recording. I use the 4K device simply because it's way better than the HR3. I've found the 3.0 tuners are 1% better than the other 2 that are 1.0 only. Where I am, 68 miles away, edge 2. I need every last bit I can get.
SD
I do not believe you can force the tuner in Channels. However, if you add it via the HDHR's direct address, you can: http://X.X.X.X:5004/tunerN/v# (replace the Xs with your tuner's IP address, N with the specific tuner number you wish to use, and # with the virtual channel number). Just remember that if you request a specific tuner and it is already in use, the tuning will fail.
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Great IDEA! How can I point it to the EPG for Channels? Since it's a custom MPG stream?
I was able to add it. It will tune when I refresh the M3U stream. But it says 0 CHANNELS. Even though I've added my zip code and told it OTA.
Did you make sure it's an MPEG-TS in the M3U settings?
Sorry. You may want to double check the address, and make sure it works in VLC or similar—I'm typing this from memory, and the address might be different. Also, check the syntax of your playlist text; make sure it has both the preamble (#EXTM3U), as well as each entry having its info line (#EXTINF).
As far as guide info, you can use the tvc-guide-stationid tag.
For more information, check the support docs:
Works perfect in VLC. Loads the MPG stream right up. Using the chosen device and tuner. But I can't for the life of me figure out how to map it to Channels so I get a channel that shows up for the stream. Sorry 
Is there no way to just use the MPG stream without making it a m3U first?
You have to set it to Text, then enter:
#EXTM3U
#EXTINF:-1, channel-id="abc-2.1" channel-number="202.1", ABC
http://192.168.1.26:5004/auto/v2.1
Once the source is added, click the Manage Lineup and then pencil icon next to 202.1 to change the guide data. You can switch to search all mode and enter the callsign of your ABC station.
Then set your pass to record from 202.1
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Except, no comma after -1:
#EXTINF:-1 channel-id="abc-2.1" …
Edit: TIL: Apparently Channels' parser will ignore the misplaced comma. Feel free to disregard my comment. However, make sure you swap out the auto in the URL for the specific tuner you want.
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The comma is allowed and ignored by Channels DVR.
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I entered exactly as written. But I don't get any options in the Manage Lineup area.
What do you see?
