Do HD on the main channel and simulcast the HD1. That would be one way.
Or say screw it and feed the translator via some other means. Few (possibly none) of the HD2/HD3 channels feeding translators across the country are actually being received over the air by the translators. They're being fed some other way.
This has been going on for years, and the Commission hasn't fined anyone for it yet.
HMM the rcvr is gonna have a hard time hearing the HD with a STRONG analog signal on the same channel....(didnt think of that huh?) Fill ins can be fed by any method but they cannot exceed the main signal contour..so that doesnt work....a xlator trying to extend a main signal on the commercial band can only be fed by over the air reception....where as a fill in (not outside the main's contour) can be fed by other means...so the idea of 105.3 getting more range by a third party xlator wont work..physics and FCC law doesnt allow it