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Yeh.. Im sure I speeled hetrodyne wrong. Feh.
This will make up fer it:
http://openfc.sourceforge.net/
Neat.
Total posts : 45366Hi,
I really do not understand what you are asking. Heterodyning is a process where two signals are mixed in a nonlinear manner to produce other frequencies. I don’t know how this can happen on the internet.
Maybe if you rephrase your question someone here can help.
Neil
I wasnt asking anything. I was stating it.
If you try to link multiple tx’s across a plain old internet link, and those tx’s are close enough to cross signals, you will get a bad case of heterodyne. You have to somehow synch them up. The link I posted does just that.
Total posts : 45366Sorry, I must have misinterpreted your post. From the title I thought you were referring to heterodyning being caused by the internet rather than the linked transmitters.
It appears to me that the system described in the link synchronizes the audio so the program content plays simultaneously on multiple transmitters but it does not sync the RF. If I am correct, this will not help with the heterodyning if the RF signals overlap. It may help with the echo effects that unsynced audio could produce.
Neil
Total posts : 45366[quote=mlr]If you try to link multiple tx’s across a plain old internet link, and those tx’s are close enough to cross signals, you will get a bad case of heterodyne. You have to somehow synch them up. The link I posted does just that.[/quote]Just curious — there are several requirements when syncing two AM transmitters on the same carrier frequency, when both can be received at the same time on a single receiver. The two r-f carrier frequencies need to be frequency/phase locked (to prevent the heterodyne you mentioned, and by the process that radio8z accurately described), and the program audio on the two transmitters needs to be synchronized in time and modulation polarity (to minimize audio distortion at the receiver). Does the application you linked to do all of those functions?
A further consideration is that the radiation from the two Part 15 AM antennas may increase net coverage range in some directions, and reduce it in others — compared to either system as a standalone operation. That takes some careful engineering to understand and control. Accurately syncing more than two AM transmitters is a real challenge.
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Total posts : 45366It’s my understanding that it actually sync’s the tx’s. Somehow. I’ve not tried it, but I will eventually.
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