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HOW RF MODULE WORKS?

HOW IS THE SIGNAL FLOW AND GET MODULATED AND DEMODULATED IN IT.

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  • arunavenue Apr 04, 2009

    basic working of encoder used in rf module in transmitter??

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Sir ... i have to construct a model bridge in which i have to give a mechanism for the passing bridge.the problem is arrival of the ship should be detected by mechanism employed on bridge and ship should have a way to cross through. plz give detail mechanism of the signalling system which should be used on the bridge which detect the coming of the ship

Posted on Aug 30, 2009

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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

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

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

How do i adjust the sideband


Instructions

Connect one end of your coaxial cable to the output port on your SSB Transmitter. Connect the other end of the cable to the coaxial input port on your RF demodulator.

Connect one end of your 1/4 inch audio cable to the audio output port on your RF modulator. Connect the other end of the audio cable to the audio input jack on your amplifier.

Turn on your SSB transmitter, RF modulator and amplifier. Adjust your SSB transmitter modulation by adjusting the knob on your RF

Jul 22, 2012 | Ranger RCI-6900F-25 CB Radio

1 Answer

Nes white screen working sound


Well a white screen means that the capacitor is broken then.

Apr 01, 2012 | Nintendo NES Console

1 Answer

On the Dynex? - RF Modulator AV Signal Converter, the RCA plugs on the back, are they input or output?


Input. The intent is to convert Composite Video, S-video and audio from newer devices to old TV's that only have RF (antenna) inputs.

May 03, 2011 | Dynex RF Modulator AV Signal Converter

1 Answer

I have an analog tv (coax cable) and a new dvd (av plugs) player. How do I inexpensively connect them? i saw the solution posted about the rf modulator. I have a digital to analog tv convertor. Is this...


NO. An RF modulator and your digital-to-analog (DAC) TV converter are 2 different devices. The DAC will convert over-the-air (OTA) digital television signals from your antenna to analog NTSC format so your older analog TV can receive OTA broadcasts. The RF modulator converts base-band video (composite cable/RCA connector, or S-Video cable connector) to channel 3 or 4, so you can watch video/audio on your set. To use both the RF mod. and the DAC converter to the same TV, use an A/B switch for F-connector coax, or follow the directions for the RF modulator to make the correct connections.

Jun 12, 2010 | Televison & Video

1 Answer

What is modem


Modem:

1) A device (modulator/demodulator) that allows computer information to be sent over a telephone line.

2) Equipment that converts digital signals into analog signals for purpose of transmission over a telephone line. Signal is then converted back to digital form so that it can be processed by a receiving computer. Modems are typically used to link computers via telephone lines. ...
3) Acronym for MODulator/DEModulator. A device that transforms digital signals from the computer into electrical impulses for transmission over telephone lines, and does the reverse in reception.
4) A modem (from modulate and demodulate) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. A device that transmits digital data in tones over a phone line.

IN GENERAL IT IS A DEVICE TO CONNECT THE COMPUTER TO THE INTERNET.

For more detailed info about the modem click here

Hope this helps

Sammy

Sep 04, 2008 | Computers & Internet

1 Answer

No sound from VCR


OK here we go, The system is connected in the following manner: DTV-----RG6Coax-----VCR-------RG6Coax-------TVset Might I suggest a simple test? from the VCR to the TV use the Video and Stereo RCA outputs. The reason I want you to do this is to see if the Audio signal is being processed by the VCRs circuitry. I think it is. If it is then you problem might be the modulator that is used from the VCR to the TV when the VCR is on. You see when the VCR is off the RF connections are basically a switched pass-thru, when the VCR is on the switch send the signal to the VCR circuitry and the back into a Modulator and into the audio and video output RCA jacks. If the test works then the signal is being processed by the VCR and it might be a modulator problem, if not then the issue might be the actual RF input circuit prior to the demodulator. Another test would be to play a tape to see if the tape plays. If it does then this narrows down the trouble area between demodulator and the audio and video detector stages. If there is an internal proble you may want to take your unit to a radio and Tv repair shop.

Aug 24, 2007 | Samsung VR8460 VHS/S-VHS playback VCR

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