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Author Topic: Power Trend  (Read 86 times)

Jim McKeveny

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Power Trend
« on: Yesterday at 01:52:56 PM »

Because of manufacturing ease and regional compliance issues, I observe that we are seeing a lot of throttling back output power in mid-line music market offerings, from 30 milliwatts down to 10 milliwatts. (There is also a battery life benefit I imagine).

Does the move to a digital signal vs. analog make this somewhat a moot point?

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Henry Cohen

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Re: Power Trend
« Reply #1 on: Yesterday at 02:50:12 PM »

Because of manufacturing ease and regional compliance issues, I observe that we are seeing a lot of throttling back output power in mid-line music market offerings, from 30 milliwatts down to 10 milliwatts. (There is also a battery life benefit I imagine).

Does the move to a digital signal vs. analog make this somewhat a moot point?

You hit the three main points exactly. A fourth point worthy of consideration is that, all else being equal, a well designed digital system at 10mW will have nearly the same usable range as a 30mW analog system.
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Henry Cohen

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brian maddox

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Re: Power Trend
« Reply #2 on: Yesterday at 05:47:37 PM »

You hit the three main points exactly. A fourth point worthy of consideration is that, all else being equal, a well designed digital system at 10mW will have nearly the same usable range as a 30mW analog system.

I don't know the math behind this [and I'm sure Henry does] but this has certainly been my experience in the field for the last decade or so.
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Russell Ault

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Re: Power Trend
« Reply #3 on: Yesterday at 07:12:57 PM »

{...} a well designed digital system at 10mW will have nearly the same usable range as a 30mW analog system.

I always find it amazing how much more noise-resistant transmission systems (wired or wireless) are when the receiving end knows exactly what patterns of information it should be looking for (that there are some modes which will work below the noise floor boggles my mind completely).

-Russ
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Scott Holtzman

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Re: Power Trend
« Reply #4 on: Yesterday at 09:00:59 PM »

I always find it amazing how much more noise-resistant transmission systems (wired or wireless) are when the receiving end knows exactly what patterns of information it should be looking for (that there are some modes which will work below the noise floor boggles my mind completely).

-Russ


Range and throughput is a function of error rate.  With robust error correction looking for packets in the noise floor becomes simpler.  The receiver is expecting bits to be in a certain place, checking to see if the data is present is simpler work.



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Scott AKA "Skyking" Holtzman

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Re: Power Trend
« Reply #4 on: Yesterday at 09:00:59 PM »


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