I recently purchased a new Vizeo TV, Model # E321MV, intending to hook directly to existing Cox cable (In Omaha) instead of renting another cable box. Everything was fine except that the tuner did not find channels 3 and 4 (Cox Channels 5 and 6.) After much frustration, I learned that Cox, in Omaha at least, uses the HRC signal mode rather than standard. This Vizeo model does not provide an option for signal mode beyond CABLE so, apparently, some of the lower frequencies are missed. Fortunately, Cox Channel 5 signal is broadcast over Channel 105.1 as one of about a dozen other QAM channels. I ended up programming only the four major networks (QAM channels) on my remote for ease in getting to them. Thses are higher quality pictures than the corresponding analog channels anyway.

I hope this information will be of some use to other viewers like me who are not fully educated in this subject.

Oops, I misspelled Vizio. Sorry about that.

Newer TV's do not have the option to select the proper cable system being used in your area because they detect it automatically so no need for it. The funny thing is that there is no much difference between them (Standard, HRC and IRC) with STD and IRC almost the same frecuency for the video carrier and such and HRC only 1.25 Mhz below them. I say funny because in any case if your Vizio TV properly decodes OTA ch 3 and 4 Analog (use an old VCR or any other video component that has a ch 3/4 modulator to test) then it must also detect ch 3 and 4 even if they are HRC (even ch 2 OTA is below them so yes the tuner has to go that low). In any case like you say is better to watch the digital version on 105.1 like your case rather than the analog 3 or 4 or whatever it is.