Based on what I'm seeing from the
information on the two HDHR4-2US tuners having the exact same issue.
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When a broadcast channel does not match the logical(program guide) channel number, the tuners are trying to tune into the frequency band for the Guide channel number rather than where the channel actually is. This is knocking out three local channels from being tunable on the HDHR4-2US units.
HDHR5-4US is working like a champ and not impacted. Issue is present for the HDHR4-2US in the last official firmware release and in the beta release as well.
Issue only appeared for me after updating firmware for the first time in well over a year while trying to troubleshoot a reception problem on a specific sub-channel on a local station.
Going to turn on diagnostic sharing shortly to see what SD can do about fixing what I'm seeing.
104182B5 and 10418273 are the HDHR4-2US units involved.
Will tune the HDHR5-4US unit (10723B60) to the same channels as well to provide a control.
For reference: 104182B5 is on a standalone antenna by itself so there is a reason why its diagnostic numbers are very different from the others, it was brought out of retirement to figure out what was going on... and isn't in a great spot for reception on many local channels.