opposite of an RF Modulator?
in [Repair]
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From: mm on 20 May 2010 01:19 Does there exist the opposite of an RF Modulator? Something that will take RF and turn it into digital for a digital tv? Details: I don't need this yet but I'm trying to plan ahead. What will I do when I have one or two digital tvs, but I'm sending analog to all the tvs in the house? I don't have the energy anymore to install homeruns from the DVDR to any tv but the one in the same room. All the rest are in series ther. I don't have the energy to run RCA cables for composite or component inputs. Right now, I use a DVDR and an RF modulator to take digital over the air tv, detect it, and convert it to analog. and I send it to the 7 tv's I have, one in each room, and maybe one for the deck too. After some effort, with some help from you guys, this works fine. The attic antenna goes to the DVDR in my bedroom and soon, I'll have a set-top box too (and a Channelplus modulator outputing two inputs on separate channels), so I can record one show and watch a second, while sending the second throughout the house. I'm not going to buy 8 digital tv's at one time, and in reality, I'm only going to get them one at a time over the next 10 or 20 years, dpending on what I see at yard sales. So what will I do when I have one or two digital tvs, but I'm sending analog to all the tvs? I don't have the energy anymore to install homeruns from the DVDR to any tv but the one in the same room. All the rest are in series. I don't have the energy to run RCA cables for composite or component. Can I convert the analog back to digital for the digital tvs?
From: Bob AZ on 20 May 2010 03:04 On May 19, 10:19�pm, mm <NOPSAMmm2...(a)bigfoot.com> wrote: > Does there exist the opposite of an RF Modulator? �Something that will > take RF and turn it into digital for a digital tv? > > Details: > I don't need this yet but I'm trying to plan ahead. What will I do > when I have one or two digital tvs, but I'm sending analog to all the > tvs in the house? � �I don't have the energy anymore to install > homeruns from the DVDR to any tv but the one in the same room. �All > the rest are in series ther. �I don't have the energy to run RCA > cables for composite or component inputs. > > Right now, I use a DVDR and an RF modulator to take digital over the > air tv, detect it, and convert it to analog. and I send it to the 7 > tv's I have, one in each room, and maybe one for the deck too. � After > some effort, with some help from you guys, this works fine. �The attic > antenna goes to the DVDR in my bedroom and soon, I'll have a set-top > box too (and a Channelplus modulator outputing two inputs on separate > channels), so I can record one show and watch a second, while sending > the second throughout the house. > > I'm not going to buy 8 digital tv's at one time, and in reality, I'm > only going to get them one at a time over the next 10 or 20 years, > dpending on what I see at yard sales. � > > So what will I do when I have one or two digital tvs, but I'm sending > analog to all the tvs? � �I don't have the energy anymore to install > homeruns from the DVDR to any tv but the one in the same room. �All > the rest are in series. �I don't have the energy to run RCA cables for > composite or component. > > Can I convert the analog back to digital for the digital tvs? MM The opposite of a RF Modulator is a RF Demodulator. These take many forms depending on what you would like to recover from a modulated signal. A RF receiver is a form of a demodulator. It recovers the signal from the modulated RF signal and outputs it as whatever. Think AM and FM. These further come in types such as analog, digital, pulse and others. What detects this information is many faceted. The one that comes to mind is a simply diode detector that designed to a plethora of specifications is wide or narrow band, freauency sensitive and anything else you would like. I am sure Wikipedia has lots of discussion that would prove interesting to you. Bob AZ
From: Rich Webb on 20 May 2010 08:05 On Thu, 20 May 2010 01:19:04 -0400, mm <NOPSAMmm2005(a)bigfoot.com> wrote: [snippety snip] >So what will I do when I have one or two digital tvs, but I'm sending >analog to all the tvs? Some (many? most? all?) current generation U.S. flat-screen television receivers include both NTST (analog) and ATSC (digital) tuners. The NTSC tuners work the same way on the flat-screens as they do for the older, CRC-based models, so you may not need to make any changes to your distribution system at all. >Can I convert the analog back to digital for the digital tvs? Not easily or cheaply. The consumer-grade market for such a gizmo is very small. If you wanted to do the heavy lifting, the specs for each are available and it certainly could be done in principle. Some guy with a web page has probably already done it but you're not likely to find one on the shelf at WalMart. -- Rich Webb Norfolk, VA
From: AZ Nomad on 20 May 2010 09:52 On Thu, 20 May 2010 01:19:04 -0400, mm <NOPSAMmm2005(a)bigfoot.com> wrote: >Does there exist the opposite of an RF Modulator? Something that will >take RF and turn it into digital for a digital tv? it's called a tuner
From: William Sommerwerck on 20 May 2010 09:56
I think this is a troll, but... To make a long story short... Almost all TVs have inputs for analog audio and video. By that I mean "baseband" (not RF) signals, such as composite NTSC or component 1080p. With high-quality cabling, you should be able to run these signals to multiple sets. |