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#11
I tried checking signal strength of 45.2 on WMC as you described. At first, the signal showed as non-existent (which is absurd since I get a decent picture) then WMC started scanning all the channels one at a time and the station then showed five bars. I tried doing a recording after that and still got the choppy audio. What's curious is 45.1 and 45.3 are all broadcast from the same place and 45.1 and 45.3 come in just fine. I contacted the station and they assured me that 45.2 had the same settings as 45.1 and 45.3 so that probably eliminates a DRM issue.
I have a powered signal splitter on order to see what happens if I throw that into the works. Even though I have an omnidirectional (more or less) amplified antenna, the signal gets split by a passive splitter; one side goes to the TV and the other side goes through the DC injector/isolator, then on to the tuners. Before I put in the second dual tuner, I didn't have the passive splitter inline and still had the same problem. The tuners are also unable to pick up three out of town channels that come from a local repeater that the TV can pickup but the tuners cannot. Even if the amp won't fix the sound issue on 45.2, it might fix the other three channels. If not, I'll look into if the repeaters for the three are on a different channel.