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In Reply to: Re: How does dB apply to a cable amplifier????? posted by Jim on October 29, 2001 at 19:26:09:
Jim,
Thanks. But I still am unclear why "dB" is the correct term here. I've always seen "dB" used to express loudness, so the description of 3dB splitter loss makes it seem like it's losing volume (rather than quality of signal).The practical solution is just to try a Radio Shack amp (with their 30 day return policy) and see if it works, but I was/ am still interested in the terminology.
Thanks again for the input,
Bruce
Follow Ups:
Hi BruceI recall from my days in telecoms that a loss 3db represents half power. So if you cable gives a loss of 3db over 100ft (for example), you will have half the power you started with.
DB is just a measure of power and need not only apply to sound.
Regards
mark
Mark is correct, (I am in telecom). The term db is a measure of power, and this "power" can be an anlaog signal either video or audio, and also applies to digital signals with video or audio content.
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