I have run the cable channel search several times. I do get channels, but only channels playing music. I do not receive broadcast cable tv channels. I do have cable running directly from the tv cable outlet to the television cable connection located on the Sanyo TV. In the upper right hand corner of the screen, the music channel says, DC79-3.

What is the difference between a RF channel and a virtual channel? The RF channel is the channel that the TV station uses to broadcast its signal. Before the conversion to digital, TV stations were normally identified by their channel number, and most people knew that a particular network was on a specific TV channel. While analog broadcasting was being phased out and all TV stations were converting to digital broadcasting, it was necessary for the TV stations to continue to broadcast their analog signals on their original RF channels, and also broadcast their digital signals on a different RF channel. However, since the TV station used their broadcast channel as part of their identification, they wanted to keep using the same channel number. To allow this to happen, the new digital television broadcasting standards (ATSC) provided TV stations the ability to continue to use their original channel number and also tell the TV set to tune to the new RF broadcast channel when their virtual channel number was selected. The original channel number is called the virtual channel number, and it will be followed by a period and a second number (3.1, 7.1, etc.).
One of the benefits of converting to digital for the TV stations is that they now have the ability to transmit more than one program at the same time on the same RF channel. The number of additional channels they can broadcast is determined by the resolution of the program (SD vs. HD, text only, music only, etc.). The second number in their virtual channel number indicates that one of the additional programming sources from the same TV station is being viewed (10.2, 10.3, 10.4, etc.).
When selecting an antenna, it is important to understand the difference between the RF broadcast channel and the virtual channel. Antennas are designed to receive specific ranges of RF channels, and the antenna needs to be selected for the RF channel you wish to receive. TV stations broadcast in two broad frequency ranges, called VHF and UHF. RF channels 2 through 13 are considered VHF, and RF channels 14 through 51 are considered UHF. In order to pick up the channels, the antenna has to be designed for the correct frequency range. It is very common today to find that TV stations using virtual channels 2 through 13 are actually using RF broadcast channels in the UHF range. Although not as common, some TV stations using virtual channels 14 through 51 are actually transmitting in the VHF range. An antenna designed for only UHF channels will not work effectively for RF broadcast channels in the VHF range, and an antenna designed for only VHF channels will not work effectively for RF broadcast channels in the UHF range.

The reason probably is because all broadcast TV is digital, and the em-55 tuner is set for analog channels. It cannot receive today's broadcasts "thru the air" because channel 2 for example is not broadcast, rather channel 2.1, 2.2, etc.

You can use the signal with a new TV, but when you turn ON the em-55, it inserts channel 3.
Most all TV here has what I call sidebands, and some have as many as 11, so the tv can be set for 3.1, or 3.2 or 3.3.

Even if you have a digital-to-analog device, the em-55 will not receive any .1, .2, .3, .4 and so on. I verified this recently reconnecting my old antenna to the converter then to several VCR's and DVD players.

Turn off the em-55, and the dot channels pass through the RF connectors..
Some DISH, cable direct TV receivers convert the signal to ch 3.

in the setup you can set the type of broadcast channels it can receive or play for over the air.

That is how the channels are broadcast - reset the cable box and make sure your TV is digital ready to receive the signals. Some channels are just scrambled and you can't receive them. Go through your set up with your remote to channel search but some will still be scrambled because they are closed circuit or just for some broadcasts.

On your TV remote,press "INPUT".It is hard to find,but it should be there.Select"TV" and press"ENTER" button.I believe it is on the top of the list.On some cable boxes you have to select channel 3 and use the cable box remote to change channels.Also,make sure your TV antenna setting is set to "Cable" from the "Air/Cable"(Antenna setting).You will have to read your manual to find out how to get to this menu.After that do a "Ch Search"[Channel search].This automatically searches for all available channels and stores them. It will take some time.You will see the channel numbers as it does it's search.This is done so when you press channel up and down keys it will only go to next channel available and not to one with no signal.Hope this is of some help.

You need to put a compatible cable decoder box between the cable and TV as the sanyo will only decode analogue cable signals via the catv UHF vhf input
the digital antenna in is for digital air broadcasting signals only

I do beleive most tv companies stopped broadcasting over the air. the only way to receive more channels is to take the cable wire that comes out of the wall and then into the tv then auto pragram one more time and see if this helps. One question why would you remove the cable box? if you cancelled cable tv all together you will not get any channels. And like i said before all tv channels are removing there air broadcasting. so rabbit ears are going to be in the past soon. i hope this clarifies the situation.

I just got the same exact one, when it searches automatically the first time it doesn't look for digital channels. go to Menu>manual channel search>cable. it will look for all possible signals and will take forever probably. the free digital channels will take several seconds to switch channel to channel, but they're there! They will show up on your screen as "DC 91-2" or similar. you can switch back to regular cable channels with the input button, you just cycle through all the inputs. hope that helps.

Most TV's auto search feature will try both the Cable and the Air frequencies, but perhaps yours doesn't. Go to the menu page for tuner setup and make sure it is set on Air (might be called broadcast) and then run the channel search.
Cable channels and Broadcast channels (above channel 12) are not the same frequencies.
Hope Ya Fix It!