TIP: Click on subject to list as thread! ANSI
echo: scanners
to: BILL CHEEK
from: RALPH MOWERY
date: 1996-10-27 19:21:00
subject: Power

Was Antenna
BC>CB meters are ver sensitive to slight flucuations for one, but two,
BC>whistling doesn't do what you think it does.  Rather than increasing the
BC>carrier, it puts power into the sidebands.  For a 4-watt carrier, 100%
BC>modulation puts 4-watts into the lower sideband and 4-watts into the upper
BC>sideband for 12-w PEP.
The power is not 4 watts in each sideband, but only 25% of the carrier
is in each sideband.  That would make it 1 watt for each sideband if a 4
watt carrier is modulated to 100%.    In an AM transmitter,if fully
modulated by a sine wave, each sideband will contain 1/4 the power of
the carrier and the PEP will be 4 times the carrier power.  The total
power out will average 1.5 times the unmodulated carrier.  A meter does
not care much where the power is. It will measuer the power at the
wantd frequency and much of the power in the harmonics if any. A
spectrum analyzer will show the sidebands and where the power is.
--- GEcho 1.20/Pro
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* Origin: Borderline! BBS Concord, N.C. (1:379/37)

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