From: "Anthony Q. Bachler"
Subject: Re: what is the difference between a transceiver and transmitter?
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Mon, 20 Jan 2003 02:22:16 -0600
NNTP-Posting-Date: Mon, 20 Jan 2003 03:22:59 EST
I actually prefer if people top post unless they are responding to specific
parts of a post, since it means I don't have to scroll down past the entire
bulk of previous posts to find their 2 line retort.
But if you mean side-band:
When a signal is Amplitude modulated, it creates 2 major components, the
carrier and the modulation envelope. The modulation envelope consists of
two side bands, the upper sideband and the lower sideband. The upper side
band refers to that portion of the envelope that has a higher frequency than
the carrier, the lower side band refers to that portion with a lower
frequency. To isolate a single side band the AM signal is first heterodyned
to remove the carrier frequency, and then the resulting double sideband is
filtered to remove the unwanted sideband. Side band is used because it uses
less bandwidth, is more power efficient, and more effectively makes use of
the phenomenon known as skip. Additionally, in the United States, Citizens
Band transceivers are limited to 5W in AM but 12W on single sideband ( upper
or lower). Most consumer CB's do not support sideband operation, but those
that do, such as the Cobra 148GTL, usually support both upper and lower
sideband. Ham operators typically use upper sideband. Sideband is more
energy efficient because it allows the same power to be used in a smaller
"If a million people say a foolish thing, it is still a foolish thing."
Anatole France [Jacques Anatole Thibault] (1844-1924)
"Laplace" wrote in message
> allow me -top posting
> What is a "Sidebank"?
> Anthony Q. Bachler wrote in message
> > A transceiver unit has a transmitter and a receiver in it. A
> > just transmits.
> > --
> > "If a million people say a foolish thing, it is still a foolish thing."
> > Anatole France [Jacques Anatole Thibault] (1844-1924)
> > "Laplace" wrote in message
> > news:firstname.lastname@example.org...
> > > what is the difference between a transceiver and transmitter?
> > >
> > >