Thread: Minimum photons-per-second [amplitude] required for 150 KHz?
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Old June 18th 07, 07:05 PM posted to rec.radio.shortwave,rec.radio.amateur.antenna
Mark Zenier Mark Zenier is offline
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Default Minimum photons-per-second [amplitude] required for 150 KHz?
In article . com,
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?


1. What is the energy of a photon at 150 kHz?

2. What is the minimum discernable signal in your receiving system?
(How much power is needed at the receiver to overcome the internal
noise of the receiver system and detect the signal?)

3. What signal to noise ratio makes for a tolerable listening condition?
(How much more power than quetion #2 is needed at the receiver to decode
the modulation and yield a usable signal?)

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

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