Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?


Thanks,

Radium

"Radium" wrote in message
ups.com...
Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?


Thanks,

Radium


The same as the minimum number of data bits required to represent this
signal. The number of photons/data bits will vary depending on the
complexity, frequency and depth of modulation of the carrier wave.

Mike G0ULI

"Radium" wrote in message
ups.com...
Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?


Thanks,

Radium

you should have stayed with the alt.sci or sci.physics groups, you don't
know what you are getting your self in for here!

On Jun 17, 3:56 pm, "Mike Kaliski" wrote:

The same as the minimum number of data bits required to represent this
signal. The number of photons/data bits will vary depending on the
complexity, frequency and depth of modulation of the carrier wave.

I am talking about an analog carrier wave. In the analog realm, there
is no such thing as "bits".

In rec.radio.amateur.antenna Radium wrote:
Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?

The answer is not simple because any given photon only has one
frequency and one energy.

So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.

Did you get tired of everyone calling you a clueless moron on sci.physics
and sci.physics.electromagnetics and think you would try here?

--
Jim Pennino

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On Jun 17, 3:56 pm, "Dave" wrote:
"Radium" wrote in message

ups.com... Hi:

What is the minimum amount of photons-per-second needed for a 150 KHz
AM radio carrier wave to transmit audio signals? Around 20,000-photons-
per-second?

Thanks,

Radium

you should have stayed with the alt.sci or sci.physics groups, you don't
know what you are getting your self in for here!

Huh?

On Jun 17, 4:05 pm, wrote:

So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.

Well, in FM the peak-to-peak amplitude remains constant but the energy
[frequency] varies.

In AM, the frequency remains constant but the peak to peak amplitude
varies.

"Radium" wrote in message
oups.com...
On Jun 17, 3:56 pm, "Mike Kaliski" wrote:

The same as the minimum number of data bits required to represent this
signal. The number of photons/data bits will vary depending on the
complexity, frequency and depth of modulation of the carrier wave.

I am talking about an analog carrier wave. In the analog realm, there
is no such thing as "bits".


Radium

If a single photon can represent a single discrete energy level, then at
some point you will have to translate your analogue signal into discrete
photons. A process similar to digitising an audio signal to produce a CD.
The number of photons will depend on the sampling rate chosen, the bandwidth
and depth of modulation of the original signal and the fidelity with which
you wish to reconstruct a representation of the original signal. 300,000
photons per second should do the trick, as that is the frequency of the
original signal and each photon can represent the amplitude of each half of
a single sine wave.

It is standard practice to sample at least double the frequency of whatever
you are trying to capture.

Mike G0ULI

In rec.radio.amateur.antenna Radium wrote:
On Jun 17, 3:56 pm, "Mike Kaliski" wrote:

The same as the minimum number of data bits required to represent this
signal. The number of photons/data bits will vary depending on the
complexity, frequency and depth of modulation of the carrier wave.

I am talking about an analog carrier wave. In the analog realm, there
is no such thing as "bits".

In the analog realm, there is no such thing as photons as they are
discrete quanta.

--
Jim Pennino

Remove .spam.sux to reply.

In rec.radio.amateur.antenna Radium wrote:
On Jun 17, 4:05 pm, wrote:

So at any given time, you need some number of photons at different
frequencies to get the frequency components and some number of
photons at each frequency component to the the amplitude components
of the total signal.

Well, in FM the peak-to-peak amplitude remains constant but the energy
[frequency] varies.

In AM, the frequency remains constant but the peak to peak amplitude
varies.

You've never seen what an AM signal looks like on a spectrum analyzer,
have you?

Go look at: http://www.fas.org/man/dod-101/navy/docs/es310/AM.htm

Hot flash for you, the AM modulation process creates other frequencies.

If you only have one frequency, you don't have modulation of any
kind.


--
Jim Pennino

Remove .spam.sux to reply.