Would it be possible to transmit at a different frequency down the composite cable, say for example at a frequency range that an analog TV could pick up?Īnd if yes, would it be possible to just have that signal transmit into the air, effectively making the composite cable a transmitting antenna?Īnd could an analog TV sitting nearby then pick up that analog TV signal?Ĭomposite video is widely used for surveillance and auto backup cameras, because it only requires a single coaxial cable to connect. What frequency is the signal transmitted down the composite cable? I understand that the composite cable signal does not have audio, but apart from that, what is different? What is the real difference between the signal on a composite cable and the RF signal that comes over the air? That signal can be transmitted over the airwaves at a particular frequency, & multiple analog TV signals can be transmitted at different frequencies.Ĭomposite video is where a single video signal goes down a cable with RCA connectors at each end and is displayed on an analog TV.Īnalog televisions do not need to be "tuned in" to the composite cable signal. A briefing in Washington offered some evidence that they've already taken major steps: where a 2002-vintage, standard-definition DVR would have used about 219 kilowatt-hours of electricity a year, a 2013 model that records in high-def and offers far more features would use just 170.My understanding is that an analog video signal (PAL or NTSC) has a particular form/structure. Tip: Your old cable box may be padding out your electric billĪ group of major cable and satellite operators pledged in December to upgrade the efficiency of the receiver and digital-video-recorder boxes they provide to subscribers.
Playing around with different antennas can help improve your reception - newer models are flat and light enough to stick on a wall - but if geography isn't cooperating, there may not be much you can do.
You may find that you can get high-def local TV for free, but you might also find that the stations you remember coming in with just a bit of snow over analog break up over digital. Digital reception, as my own experience and reader reports have endlessly reminded me, doesn't match analog. The last bit of advice I'd give: If you can, first borrow somebody else's digital TV or DTV tuner to see whether you get acceptable reception at home.
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