[AMRadio] FCC's AM power


Rob Atkinson ranchorobbo at gmail.com
Mon Sep 26 21:47:42 EDT 2016


Those meters that supposedly read PEP are almost like a scam.  The
reason is the meter isn't fast enough and even if they have some sort
of battery powered "peak and hold" setting, that only captures a
"peak" that may or may not be the "peaky peak super peak."

Here a peak there a peak everywhere a peak peak Old Macdonald had a farm....

So then you try an audio sine wave from a sig. gen., but that doesn't
represent a human voice.

Which is why PEP is so ridiculous.  Most AM operators who put any
thought into this wind up speaking of their power in terms of carrier
or input power and let it go at that if they mention it at all.  It's
the only meaningful power term.   Previously I mentioned AM broadcast
stations measure antenna current.   They do this at an arranged time
when there will be a dead carrier for at least 5 or 10 seconds so a
reading can be made.  They don't attempt any power calculation based
on modulated current.

73

Rob
K5UJ


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