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RF Bypass?

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Old 01-19-2007, 04:47 PM   #1
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Default RF Bypass?

Is anyone familiar with "RF Bypass" in cable boxes? There is supposed to be a way to bypass your cable box and go directly to your tv, in case your box goes down, without having to disconnect or re-route any wires. I know that in my cable box you have to select "RF Bypass, ON" and then hit the A/B switch in the front of the cable box. I also have a coax connected from the box (Out to TV) to the antenna in of the set.
But I do not get a picture on my set when switching over to "antenna 1".
The reason I want to do this is I was getting free HBO before the box went in. Now with the box I do not get it at all. If I switch the cable line directly to the tv, like before, I still get the HBO. I want to be able to "bypass" the box without changing the cables. The RF bypass is supposed to do this.
Any ides?
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Old 01-19-2007, 09:31 PM   #2
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From what I've seen w/ the newer boxes, they have done away w/ the RF bypass.

At least on digital boxes.
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Old 01-20-2007, 06:02 AM   #3
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My STB actually has an area to turn the RF bypass on/off, in the setup menu.
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Old 01-20-2007, 12:14 PM   #4
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Quote:
Originally Posted by Buddyjay
My STB actually has an area to turn the RF bypass on/off, in the setup menu.
What kind of box is it........? an analog , with the #'s in red ?
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Old 01-21-2007, 06:41 AM   #5
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It's a Comcast Motorola box. #'s are in yellow.
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Old 01-21-2007, 04:30 PM   #6
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Quote:
Originally Posted by Buddyjay
It's a Comcast Motorola box. #'s are in yellow.
The older , bulkier DCT's had RF Bypasses. The newer ones don't.
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Old 01-22-2007, 08:31 AM   #7
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I don't think the A/B switches are active on most cable boxes.
Get a good 2 way splitter, send one output to cable box and the other to ANT 1. If your tv has a QAM tuner, this works great for picking up unencrypted digital channels (locals and VOD programs).
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Old 01-23-2007, 06:02 AM   #8
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I tried that and it didn't work. I actually found a splitter with a slide switch. One saying "Cable" and the other saying "antenna". When I switched it over to antenna all I got was "snow".
Do youy think I regulare splitter would work? Again if it has a QAM tuner?
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Old 01-23-2007, 06:33 AM   #9
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Did you run a channel scan for the ANT 1 input?
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Old 01-23-2007, 09:06 AM   #10
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What is the brand and model number of your TV?
The setup with the 2-way splitter would be one coax output to cable box, then HDMI,DVI or component cables to corresponding TV input.
The second coax output would go to ANT 1 on the TV, then do a channel scan on ANT 1. If your cable provider does not encrypt the local HD channels, you should be able to pick them up if your set has a QAM tuner.
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Old 01-23-2007, 04:23 PM   #11
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Default RF Bypass No More

I had some old "General Instruments" digital boxes (Motorola bought out General Instruments) that look the same as the current Motorola standard digital box except they had an RF Bypass contraption on the back of the cable box. With RF Bypass I was able to view analog chanels without having to turn the cable box on. Then at some point I started having reception problems and the Comcast tech came out and removed the RF Bypass stuff from each of the cable boxes. He said that the RF Bypass stuff could go bad and thus cause reception problems.

I have since replaced all of my cable boxes with Motorola boxes and none of them have the capability for RF Bypass.

You can simulate RF Bypass by using a splitter. Connect the cable coming into the house to the input on the splitter. Connect a cable from one splitter output directly to the television VHF/UHF/Cable input. Connect a cable from the other splitter output to the cablebox. Connect a set of composite audio (L/R) and video cables from the composite outputs of the cable box (bottom row) to a set of composite audio/video inputs on the television. Now you can watch the TV via the regular VHF/UHF/Cable connection without having to turn your cable box on. If you want to watch from the cablebox, turn it on and set your TV input from whichever set of audio/video inputs you connected your cablebox from. If you have a VCR you can connect it to the cablebox and then watch one program from the VHF/UHF/Cable input while at the same time recording a program on another channel from the cablebox via the audio/video inputs.

I hope this helps and didn't confuse you.

Last edited by LennyO; 01-23-2007 at 04:29 PM.
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Old 02-13-2007, 01:25 PM   #12
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Splitter worked fine. Thanks.
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Old 02-17-2007, 04:04 AM   #13
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Some older cable systems run a dual (siamese) cable line. The dual rf were made to deal with these systems. There is a little silver box that atteched to them to convert from single line to dual line, ie.. AB switch. GL
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Old 09-08-2008, 11:15 PM   #14
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Default Is there any way to program the rf bypass to work?

I had an older general instruments box that had the rf bypass. When i bought my lcd hdtv and watched regular cable through it, not turning on the box, i was able to get all of my broad cast channels in hd. now i can't because comcast replaced my box when i started having problems with tiling. With out getting a splitter, i would need a 3 way splitter so that i could get tv in the basement, i was wondering if anyone out there knows about programming these boxes. It is still a general instruments box.

I can't believe that comcast did this. I know it is only because they want everyone to pay for hdtv service, but this is crap.
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Old 12-27-2008, 03:03 PM   #15
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I've got a new Motorola DCH 3416. It has RF bypass ON/OFF setting in the MENU>>SETUP>>Cable Box Setup.
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