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1. Rf Modulator Purpose

Posted on Monday, December 22, 2003 - 11:20 GMTAnonymous,The RF or coaxial cable contains both the audio and video signals. Appearently your TV isn't able to separate the audio and video on it's own.As you may or may not know, an RF modulator converts the A/V signal, which is the 3 RCA cords, into RF which is the coaxial cable.

If you just get an adapter as ed suggested, or you run it through the VCR what happens is that you aren't really converting the signal and you can experience these weird phasing in and out phenomenons on your TV. That's why you need the RF modulator.I'm open to correction or further clarification from an expert.The demodulator that you linked to in your previous post does look like it would work. It is 2 to 3 times the price of an RF modulator though. Why don't you save the money and get a better TV?

Posted on Saturday, January 31, 2004 - 18:22 GMTI have a modern TV in our kitchen with component, composite, S-video, and standard coax inputs. My satellite receiver and all other electronics hub is in the living room. Although for our den I had the foresight to lay both component video and stereo audio wiring from the living room hub, I failed to so for the kitchen. Wiring from the hub to the kitchen is otherwise generous, however, consisting of: 2 RG6 coaxial cables, a 16-4 speaker cable that nicely brings speaker-level sound output from the receiver, and one still available CAT-5 run.

I don't want to buy a second DirecTV receiver subscription, since we almost never need to have two different channels on at the same time. Wireless isn't an option. At present, I'm simply using the worst quality coax out from the satellite receiver in the living room and bringing this signal to the kitchen TV via one of the RG-6 cables. Is there a way to bring component video with good stereo to the kitchen TV by a modulation/demodulation or by some other means that wouldn't be too expensive? If not, what's the best way of getting a great S-video signal with good stereo to it? Posted on Monday, April 19, 2004 - 22:53 GMTHello,I wanted to make sure I ran the right cables before sealing up the walls of a remodel.

Took down a wall to make a combo kitchen/family room.Where the wife wants the TV for family room viewing does not work well when seated at the kitchen table. I originally ran video & two cat-5e's to the main TV and also to two cabinets in the kitchen. Idea was could open a cabinet door or two & have a tv there in view for all around the kitchen table.Contractor is about to put up the shear walls with tons of nails, so I'd like to get it right! A friend said I should run two videos to all possible TV locations, one for cable or antenna, one for future satellite, or to feed that tv from other sources, like a central DVD or TVO or whatever.Also would like to watch same thing on all 3 tv's at times (like a sports bar. She'll love that, like the commercial!)All wires originate out of a central closet.The two cat-5e's were for phones & data, not necessarily related to tv, but who knows in the future.Will I be able to plug in my video camera into the main tv, and pipe it to other TV's down the second coax cable, through the central closet?How would I convert video/audio out (or component video out) to coax, and then back again at the second or third tv?Thanks in advance. Much appreciative of any suggestions!

Posted on Wednesday, June 16, 2004 - 04:17 GMTHey,This is a reply to Mike Mainiero's post. I'm probably a little too late, but this is a good tip to all who are remodeling or building and need to know. As to audio video cables and Cat 5 cables. The more the marrier. Over kill with blank wall plates are very good options.Now with the coax, remember some satellite receivers are dual tuners and need two (2) coax cables in to the receiver and another to feed out to the other tv. I am a satellite dish installer and have to run new lines all day long, even in newly remodeled homes because this was overlooked.As far as converting cables into other cables, go to your local electronics store such as Best Buy or Circuit City. They will carry the majority of cable conversions or send you to the right place.Take care all (i'll try to keep it shorter next time) noc.

Posted on Thursday, July 08, 2004 - 19:50 GMTi need help! I'm not sure if this is a simple problem and i'm just not knowledgeable on the subject or if it's really impossible:i want to hook a dvd player up to my tv, which has nothing but a cable jack. I know i'm going to need an rf modulator for the dvd player, but i already have an rf switch in place for a nintendo system.does anyone know if it will be possible for me to hook up this second rf mod in addition to the switch i'm already using? Am i going to have to keep swtiching between two coaxial cables or something? Posted on Wednesday, July 14, 2004 - 16:08 GMTMy Box for my 30HDT20 (Hitachi) has A and B inputs for COAX. I've been using 'A' for my digital cable and 'B' for my VCR. I recently put an antenna on my roof, so I could get the HD signal without having to upgrade my Cable (I think I'll just get rid of it).

I get really nice signals for a number of channels. The problem is, i would like to use the 'B' for my antenna. Unfortunately, using a component connection for the VCR won't work.

Do I need a tuner for this (I guess to convert the rf signal into a digital signal)? Posted on Wednesday, July 21, 2004 - 04:22 GMTJeff, I have a 57wxw20b Hitachi. I talked with them today and I was told that antenna C is for antenna for local hd programming. They also said that antenna A and B can be used for a local antenna as well. These Hitachi's can get quite confussing. They are awesome TV's though.

I think you should call 1800 hitachi and talk to them though. They call is free and so is the customer service tech support. Oh u may want to look into running your cable into your vcr and then using just one antenna for both components instead of the two.

This will free up the other antenna that you are wanting to use. Posted on Friday, August 13, 2004 - 16:41 GMTI have cable hookup to my living room.

I have a ClearOne A/V trans/receiver that I want to use to transmit the signal to my TV in the basement. Unfortunately the trans/receiver comes with RCA inputs and outputs. From all that I have read in this thread - it looks like I cannot connect my coax cable to the RCA inputs of the transmitter - other than by using a cannibalised RF demodulator - right? There isn't a simple (read cheap) adaptor?

This thread has been certainly helpful. Posted on Friday, September 17, 2004 - 08:42 GMTI have about 8 gaming systems, I want to abuse the projectors in the classrooms at my college, they have 2 connectors in the wall up to the projector, one is the standard svga/vga D shaped plug, the other looks like an RCA video plug. On the projector itself(mounted to the ceiling) is some other ports, looks like the whole RCA set with sound for some reson. And some other deals. The gaming systesm I have connect to a tv normaly via either the 2 horseshoe shaped wires with screw combo and a cool beans computer/tv switch box, or via regular RF coax, like the stuff that comes out of the wall, and off the poles.A demodulator package looks to be 100 US beans. I don't want to spend that.

What steps are involved in translating the signals? I have access to a minicomputer with software configerable i/o ports and a vga port as well. Posted on Sunday, February 20, 2005 - 22:22 GMTHello,I have two of these S-Video/RF modulator things and everytime I attempt to use the unit when power is supplied to the unit the power light goes on and then shuts right off, in other words the unit won't stay on, it just turns on an shuts right off? I had the unit working for some time, 2-3 months just fine then suddenly it started doing this.

I found another one to test to see if it was the unit and its doing the same thing, this unit is also brand new purchased the same day. The first unit was originally plugged straight into the wall, then into a surge protector would there but a power supply problem that caused both units to be fried?Any insight and help would be appreciatedThanks. Posted on Monday, February 21, 2005 - 00:55 GMTSince I wasn't able to edit before I realized I never registered duh.here is a little more infoHaving the older TV i had never successfully been able to get the TV and the Computer to cooperatere. None of the generic Input devices have worked until this RF Modulator was discovered which required the power supply.

The TV only has RCA inputs and the Coax inputs, and the S-Video/RCA adapter/converts never worked either, so the Modulator is the only was I have of getting the two units to talk to each other successfully. Posted on Monday, February 21, 2005 - 02:31 GMTI think your actually getting the point wrong here.The problem has nothing to do with the two working together, that part has been established, the problem lies in the RF Modulator or somethingThe RF Modulator immediately turns on then off right after having power supplied to it. Whats being connected to the RF Modulator should have nothing to do with why its just turning off I would think?But why would both of them be doing the exact same thing suddently when the one was just working perfecly fine, and the 2nd one is BRAND NEW? I have tried other outlets in the house/surge protectors, etc.

All with the same result. Chrome remote desktop host download. Posted on Monday, February 21, 2005 - 03:32 GMTBrian Edwardsok i may be way off base on your question, and a bit confuse to, i might say loloklet go over a some base info and see if we can get close to what you whatthe basic fact is on older tv you need a re mod to run a dvd on that tvokfor example her what i have to do i have older tv, so have to have a rf mod to run or even see a dvd on tv screen,ok my rf mod is off on til i turn on the dvd player, of which the little red light come on when dvd come onare we get close yet lol. Posted on Thursday, April 28, 2005 - 06:40 GMTI'm having the same problem as Brian Edwards. I purchased a Terk RF Modulator(MOD 41).

I thought it was the answer to my problems 'til i plugged it in and found a new problem!! The damn power won't stay on right out of the box.

The frustrating thing is that i know it's something i'm doing wrong, cause this is the 3rd unit i've brought into this house(all different manufacturers). The result is the same. I'm about to saw a 32' hole in my wall so i can watch tv in my office from the living room! No Response Needed- The saw's in my hand.:P. Posted on Sunday, June 12, 2005 - 19:03 GMTRF Modulator no red light problem solved: I had the same problem where the red light on the modulator would flash on for a second and then wouldn't work anymore. Being stubborn I switched cords and tried new plugs-finally tried plugging in everything into a surge protector and then turning everything on at once.

(I also unplugged the red plugs the first time because the drawing on the instruction manual only had two cords plugged in. Don't think this made a difference)My TV automatically comes on when the power turns on. So if yours doesn't turn on the TV first. Nothing changed until I hit the power button on my DVD-only then did the modulator red light come on. Don't know why but it worked that way but it did.

Posted on Monday, July 25, 2005 - 21:01 GMTI would love to hear options on RF to RCA as well. I have just purchased a 7' portable DVD player that will take AV input via RCA. I have cable (RF) run into the room where this device will be used. I would love to send a signal to it from my Dish Network Satellite receiver.

But I don't want to have to run 40' of RCA cable to do it. If they make a demodulator I would be interested. Even a low cost tuner would work. But as it looks now I may have to spend $100 on this gadget. Posted on Monday, January 09, 2006 - 01:14 GMTI have an old Atari 5200 video game system that has a cable out with one RCA on the end that plugs into a small 'tv/computer' switch box, which then plugs into the coax connector on the back of my television. What I would like to do is bypass the 'tv/computer' switch and connect the one RCA out to the three RCA in on my television set. That way I wouldn't have to keep switching the 'box' just the AV/TV on my television remote.

I have no idea what type of signal (perhaps RF) is coming out of the Atari unit but the 'tv/computer' switch looks to be very simple on the inside. Does anyone know what type of 'converter' or 'switch' I would need to acomplish this? Your input would be greatly appreciated.

Said by:I am using a Radio Shack RF Modulator and when i have everything hooked up if the Modulator is switched to MOD mode (the only mode that displays the security cameras) it works, but the TV signal is choppy and basically stops.In the analog transmission world you would put notch filters on the coax going to the STBs to keep the analog signal off them. Whether that would work with HPNA, I have no idea. If the 3-4 modulator does not work, you could experiment with an agile modulator, but of course your typical notch filter is not agile.Also instead of splitters you could try using directional couplers, aka DCs, and attenuators, but without a signal meter it takes a lot of experimenting to get the right dB values.Dish Network seems to have perfected FDM over one coax, where they can run two LNBs to two separate STBs and also backfeed two additional analog channels for sets 3 & 4, over one coax. Plus they have an input for terrestrial (OTA) TV which would be perfect for your application.

Cheap begets clever. Aside from this working with HPNA or not, you should also note that you can't use a typical RF modulator, you need to block channels 3-4 first before you broadcast a local source through it. Please review link for reference.»The second item, model number HMM10H is what I use at my residence.

It gives me the flexibility to choose what channel I want to broadcast on. The advantage to this is that I can use the higher end of the spectrum where I don't have any local TV broadcasts.You may also want to call the tech department of Hometech Solutions, the company in the link I provided. I order most of my materials from them due to their support and service. I may be wrong, I haven't played with HPNA enough to state for sure. However, I do know if you are doing a regular coax run, you must either use filters to block off certain over the air channels, or use a modulator to broadcast on an unoccupied channel.

In my area we have strong OTA broadcasts and I guess the coax wire would act as an antenna and pick it up. With that Holland modular, though, it's worked flawless and I got multiple units broadcasting multiple cameras all around the house.

Rf Modulator Purpose

Again, giving the folks at Hometech may be your best bet as they seem to be on top of the latest trends and have always answered my questions 100%.Good luck and please report back if you get it to work! I am happy to say that after many hours of failed attempts with RF modulators, splitters, and whatever else i could get a hold of i have successfully broadcasted my security surveillance video to every TV in my house through the same coax wire that carries my U-verse signal. I tracked down an ATT U-verse installer and hit him up for a diplexer. Sure enough i put the diplexer on my U-verse's main feed & connected the surveillance system coax video out to the diplexer and at each STB (from the wall) i have a splitter with one cable feeding the STB and the other with a RCA male to RF female connector hooked up to the Video in on the TV and now i can see my cameras on every TV. Thank you everyone for your help. A special thanks to the ATT technician who replied to my lengthy emails and called me twice at work to discuss. Said by:I tracked down an ATT U-verse installer and hit him up for a diplexer.

Sure enough i put the diplexer on my U-verse's main feed & connected the surveillance system coax video out to the diplexer and at each STB (from the wall) i have a splitter with one cable feeding the STB and the other with a RCA male to RF female connector hooked up to the Video in on the TV and now i can see my cameras on every TV.Great! Please post any part numbers and photos of the diplexer and splitters so others can get the same fantastic parts and service from AT&T staff, if they're good at begging, or from third parties if these are available on the retail market.