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Rf modulator not working

Should the light on the Phillips RF modulator be on if it is working?

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  • laurendg04 Mar 16, 2009

    Hi, I have the same problem.  I have a Phillips RF modulator hooked up to my Magnavox old tv set.  All the cables are correct (I hope): Coax Cable out to RF's ANT IN, TV coax cable out to RF's To TV, JVC DVD cables run from DVD out to RF's DVD IN.  When I plug in the modulator the light flashes but won't stay on.  I have the TV on channel 3 and the Modulator on channel 3.  I can tell it works for a second because the screen goes somewhat fuzzy for a moment, but it doesn't seem to be working at all.  Is it a bad Modulator?  I got it about a year and a half ago, but haven't used it at all since I bought it.  I hope I don't have to buy a new one, I'm a broke college student :(

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srinivasb81
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SOURCE: need installation instructions for phillips divx ultra

Hi,
Please tell me the exact problem what you having????
With DVD player Or With TV???

If at all you are getting "no disc" on your player its due to Disc compatible mean to say that Not supporting.
If at all there will be a Player Lens Problem.

Posted on Jan 09, 2009

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1 Answer

Transmits and receives no modulation out


I am not an expert but I think there can be little or no modulation of the carrier wave unless there is an audio input to the modulator. Like any audio amplifier a transmitter modulator (amplitude modulation) is quiescent without an input.

If the modulation amplifier and audio pre-amp are working and modulating the carrier wave and the antenna is ok then audio modulated radio frequency must be being transmitted.

It would be an extremely good quality CB that had a modulation meter. Mostly all they have is a meter giving an indication of the rf power being sent to the antenna and that rf (radio frequency) power would be the same whether modulated or unmodulated.
The modulation envelope, incidentally, is traditionally viewed or measured with an oscilloscope.

The indicated rf power could be verified using a field strength meter but the only practical way to discover if a standard CB is transmitting modulated rf is to listen to the transmission on a suitable receiver. If the squelch is turned down it will be obvious if the rf carrier wave is being received as the hiss would be silenced. If no audio is received it can be assumed none is being transmitted.

I suggest you try another microphone and lead and if that doesn't work it is clearly a job for a repair shop.

Oct 28, 2015 | Radio Communications

Tip

RF Modulators and cable connections


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RF MODULATOR HOOKUP
For a TV with only a RF input jack, a RF Modulator can be used to hookup DVD players, DVD recorders and other devices which output RCA composite video and audio. For example, analog cable TV can be connected using a RG-6 type coaxial cable to a VCR or older DVD recorder's analog cable ready tuner RF input. Then as shown above, the output can be connected to the TV thru the RF modulator. The modulator outputs on channel 3 or 4 for the older TV so the TV is set to channel 3 or 4. Some RF modulators are built-in to Audio/Video switch boxes. These allow multiple RCA inputs along with RF input.

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RF MODULATOR CLOSE-UP
The modulator converts signals to channel 3 or 4 so older TVs can tune them on their analog tuners channel 3 or 4.

RF Modulator - buy online
http://sewelldirect.com/belkin-rf-modulator.asp

on Aug 23, 2010 | Audio Players & Recorders

1 Answer

I am considering purchasing a Funai Full HD UpConvert DVD Recorder/VCR Combo. I have a HD Phillips TV with HDMI connections. I do not have cable - just use over the air TV. How do I connect the Fun


Purchase a DVD recorder/player that has a HDMI cable connection and use the connections on the TV so you'll get a hi def picture. RF will NOT give you a Hi Definition picture even if it's up converted.

Jan 01, 2015 | Funai Magnavox DV225MG9 DVD/VCR Combo...

1 Answer

My wii u stil wont work after being hooked to an rf modulator to an older tv


Hi Lisa can you provide some more information
What is the model number and make of the rf modulator?
what wii output did you use to go into the rf modulator ?
what frequency does the rf modulator output at ?
What model number and make is the television ?
What type of cable is being used from the rf modulator to the tv ?
Is it a video cable or a proper 75 ohm impedance coaxial cable
what is the impedance of the rf modulator output is it 75 omhs and what is the impedance of the tv is it 75 ohms or is it 300 ohms if it is 300 ohms on the television ( usually antenna is a ribbon cable screwed onto the back of the tv rather than a coaxial socket ) different you need a balun
http://www.jaycar.com.au/productView.asp?ID=LT3022
I am recommending your first point of problem trouble shooting first is to check the impedance of your television compared to the impedance of the rf modulator and compared to the impedance of the cable used. IF they do not match then power is lost and the signal won't get to the TV.

Dec 27, 2014 | Nintendo Wii U

1 Answer

No RF out


Some VCR's have the ability to switch off the RF output. You should look under the tuning menu of the VCR.

Nov 08, 2014 | Televison & Video

1 Answer

My RF-modulator works when I use a short coaxial cable but will not work on longer runs. Why?


RF modulators are intended for short runs. There is too much signal loss for a long run

Dec 17, 2012 | GE Rf-modulator 73452 Connects All Kit

1 Answer

I have a rf modulator i dont no where any thing goes i tryed i just dont understand it i just brought a dvd and vhs to gether


alot of DVD/VHS combos have a built in RF modulator. Look for a coax (screw threads) output on the unit and it should be labeld either DVD/VHS OUT or just VHS OUT. If it does not have a combo out then you will need to use the seperate RF modulator.

Your combo unit should have a set of yellow red and white jacks that are labeled DVD & VHS OUT. Connect these yellow red and white to the yellow red and white on your RF modulator, then connect the coax (screw threads) out on the RF modulator to the coax jack on the back of your TV. There is also typically a swich for channel 3 or 4 on the RF Modulator, make sure you TV is on which ever channel you have that switch set to. If your RF modulator has a power light on it, it will usually not come on until your DVD/VHS is sending a signal through it and it is connected properly.

If you have an antenna or cable box, your RF moudulator should have an Antenna or Cable input jack on it that you can use.

May 05, 2011 | Magnavox DV220MW9 DVD Player VCR

1 Answer

My grandson is trying to hook up a wii to a tv that only has coaxial signal input. We are using a phillips RF modulator but the only thing that happens is that we get snowie static on both chanels 3 and 4.


Look on the back of the modulator to see what chanel is selected. Also when it is working right when you turn on th Wii a light on the modulator will come on. So make sure all the wires are hooked up right and the Wii, Tv and modulator are plugged in.

Jan 11, 2009 | Nintendo Wii Console

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