Adding aerial socket
- Thread starter DiyNutJob
- Start date
Wonderful demo, but DNJ will not understand it, or he will dispute it!
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That is an excellent demonstration of what is happening in the typical domestic TV installation, including the standing wave in the mismatched single aerial, single 75Ω coax and single TV found in many homes.
Well found.
And I'm very grateful to them as I haven't touched my crappy installation due to digital changeover.
Cool. Can't say I understand it. If the impedance reduces (or dampens like a car shock absorber) the received signal, the correction is to increase the signal strength. Since the area I am in has strong signal, any impedance I add would not be sufficient to cause the complete loss of the signal. This was the case since the analogue days when I did splits using ordinary aerial connectors. The present digital signal is considerably more powerful and capable (through addition of error correction to reproduce lost signal) than the analogue of the old. Hence my conclusion that I didn't need any special adaptors to do a split. In fact, I could add even more impedance than before to take advantage of the stronger and more capable source signal. From the limited observation I made on this occasion, the digital TV signal could pass through walls, floors, and roofs like x-ray (assuming x-ray passes through these things). The old analogue signal could never do that. Even my idiotic wifi signals couldn't do that well.
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No. The impedance mismatch results in distortions to the signal. Increasing the strength of a distorted signal does not remove the distortions.
Compare with e.g. trying to communicate with someone in an echoing tunnel. Shouting louder may not help, but talking more slowly, with gaps between the words while the echo dissipates, may do.
It seems inevitable the signal scheme would allow for a range of impedances. Splitting the cable may not necessarily take the impedance out of range. The only way to find out is to do it. I was on the verge of doing it before being short circuited by the non-necessity of it. Perhaps another time. Thanks for the info.
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