612 OTA Tuner is junk. When I got my 612 that was going to be my number one feature of being able to record off two tuners and OTA until I tried it and the OTA reception was terrible. Plus reception was terrible in Brooklyn just being 4 miles from the ESB I picked up two cruddy NJ stations (WNJU and WFME in cruddy 480i) stronger 15 miles. Reception in NYC has improved better on some channels broadcasting from the ESB since last July. Should be better after the June 12th transition. This is all using a Terk HDTVi indoor antenna.
Back to the 612 I saw more of that stupid annoying error screen and also the receiver keep locking up on endless Acquiring Satellite Signal strength screen when changing between OTA and Satellite forcing me to do a reboot. It did this one time when I was recording a movie on the second satellite tuner and the movie was almost over. Also it would randomly reboot while doing a channel scan. It did it when I first got it and did a channel scan. After that I had enough and I hooked my antenna back to the TV. I use the tuner in my TV for OTA. I often watch channels like WABC and WNYN (FOX) OTA which are my strongest ESB channels but through my TV.
Otherwise as a DVR the 612 is great at recoding two satellite stations at the same time. Also I get all of the major networks on Dish Network except My Networks (WWOR) and PBS (WNET). Also I can't get dit OTA on PBS (WNET) except for the NJN (WNJU) PBS station that is in 1080i HD. But I will not trust recording anything OTA on the 612.
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My Router: Netgear R7000 - Advanced Tomato 3.3-138 K26ARM USB VPN-64K.
My Streaming Devices: Fire TV Stick (2nd Gen), PS4 (1st Gen), Roku Premier, TiVo Roamio OTA.
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