what is ssb?
 

I'm looking for a new cd (that's in a different thread) but
I forgot to ask... I've never owned an SSB unit. What exactly
will an ssb unit do for me? Does that just give you more channels?

SSB (USB/LSB) is a different mode of transmission like a AM/FM radio
but with different characteristics. SSB Has no Carrier. Alot of people
consider USB/LSB different channels, but they are wrong. SSB radios
use the same channels as AM, a kc difference +/-, Just a different
mode. So if you get a 40 Channel AM/SSB radio, You get a 40 Channel
AM/SSB radio! Not 120 Channel....

On Fri, 29 Aug 2003 08:37:13 -0400, Joe wrote:

I'm looking for a new cd (that's in a different thread) but
I forgot to ask... I've never owned an SSB unit. What exactly
will an ssb unit do for me? Does that just give you more channels?

So if you are using ssb does the other person have to be using
ssb too? For example can a ssb on channel 19 talk to channel 19 on a
regular unit?

Trs1 wrote:

SSB (USB/LSB) is a different mode of transmission like a AM/FM radio
but with different characteristics. SSB Has no Carrier. Alot of people
consider USB/LSB different channels, but they are wrong. SSB radios
use the same channels as AM, a kc difference +/-, Just a different
mode. So if you get a 40 Channel AM/SSB radio, You get a 40 Channel
AM/SSB radio! Not 120 Channel....

On Fri, 29 Aug 2003 08:37:13 -0400, Joe wrote:


I'm looking for a new cd (that's in a different thread) but
I forgot to ask... I've never owned an SSB unit. What exactly
will an ssb unit do for me? Does that just give you more channels?

SSB = AM without the carrier and the other sideband.

-SSB

Trs1 wrote:

SSB (USB/LSB) is a different mode of transmission like a AM/FM radio
but with different characteristics. SSB Has no Carrier. Alot of people
consider USB/LSB different channels, but they are wrong. SSB radios
use the same channels as AM, a kc difference +/-, Just a different
mode. So if you get a 40 Channel AM/SSB radio, You get a 40 Channel
AM/SSB radio! Not 120 Channel....

On Fri, 29 Aug 2003 08:37:13 -0400, Joe wrote:


I'm looking for a new cd (that's in a different thread) but
I forgot to ask... I've never owned an SSB unit. What exactly
will an ssb unit do for me? Does that just give you more channels?

wrote in message
...
On Fri, 29 Aug 2003 13:19:22 -0400, Joe wrote:

Under ideal conditions what kind of range are we talking?
AM = 4-5 miles?
SSB = x miles?

If AM is 4.5 miles then SSB would be 12.7 miles

Nope. Inverse square law, if your twice as far away u recive only a 1/4 of
the signal.

Under ideal conditions what kind of range are we talking?
AM = 4-5 miles?
SSB = x miles?

If AM is 4.5 miles then SSB would be 12.7 miles

Nope. Inverse square law, if your twice as far away u recive only a 1/4 of
the signal.


Nope. 3KHz as opposed to 6KHz bandwidth, 3dB gain. .25uV as opposed to .5uV
sensitivity, another 3dB gain. A useless carrier, a waste of power and cause
of heat. Sideband vs AM, AM loses.

On Sat, 30 Aug 2003 21:30:21 +0100, "Darkhorse"
wrote:


wrote in message
.. .
On Fri, 29 Aug 2003 13:19:22 -0400, Joe wrote:

Under ideal conditions what kind of range are we talking?
AM = 4-5 miles?
SSB = x miles?

If AM is 4.5 miles then SSB would be 12.7 miles

Nope. Inverse square law, if your twice as far away u recive only a 1/4 of
the signal.


Are you sure about that?

On Sat, 30 Aug 2003 21:30:21 +0100, "Darkhorse"
wrote:


wrote in message
.. .
On Fri, 29 Aug 2003 13:19:22 -0400, Joe wrote:

Under ideal conditions what kind of range are we talking?
AM = 4-5 miles?
SSB = x miles?

If AM is 4.5 miles then SSB would be 12.7 miles

Nope. Inverse square law, if your twice as far away u recive only a 1/4 of
the signal.

I did use the inverse square law along with other factors in arriving
at the 12.7 miles.

"Radioman" wrote in message
...
Under ideal conditions what kind of range are we talking?
AM = 4-5 miles?
SSB = x miles?

If AM is 4.5 miles then SSB would be 12.7 miles

Nope. Inverse square law, if your twice as far away u recive only a 1/4
of
the signal.


Nope. 3KHz as opposed to 6KHz bandwidth, 3dB gain. .25uV as opposed to
..5uV
sensitivity, another 3dB gain. A useless carrier, a waste of power and
cause
of heat. Sideband vs AM, AM loses.

Yep. Radio waves still have to follow the law, same as the rest of the
electromagnetic spectrum.

The gain is done inside the rig.

BTW, has a raser (radio equivalent of a laser) been invented yet?

Joe wrote:

I'm looking for a new cd (that's in a different thread) but
I forgot to ask... I've never owned an SSB unit. What exactly
will an ssb unit do for me? Does that just give you more channels?

SSB stands for Single Side Band, suppressed carrier. It is amplitude
modulated. AM--Amplitude Modulation, transmits the carrier and two
side bands, which result from mixing the carrier signal with the audio
from the microphone. This process of mixing is called modulation. The
resulting sidebands reside above and below the carrier frequency at
frequencies equal to the sum and difference between the carrier and
audio frequencies. In SSB, the carrier and one of the sidebands are
removed. Then all of the power is used to amplify the remaining
sideband before being transmitted. Thus, there are two modes of SSB,
USB--Upper Side Band, and LSB--Lower Side Band.

SSB has advantages, such as much narrower bandwidth (takes up less
frequency space) and as such is more resistent to certain types of weak
signal fading. Also, since all of the power from the amplifier is
concentrated in one sideband, that narrower signal carries a bigger
punch than an equivalent signal using double-sideband AM.

It does not give you more channels, but with proper filtering and
detection, two contacts can be conducted on the same "channel", one
using USB and the other using LSB, without interfering with each other.

Scott
--
Any sufficiently advanced bug is indistinguishable from a feature.
-- Rich Kulawiec

Keith Hosman wrote:
When using SSB there is no carrier unless you modulate
(talk).

Actually, there is no carrier, even if you do talk. The carrier is not a
result of modulation. It is created in the circuitry of the radio. It
is the sidebands that are a result of modulating the carrier with the
audio from the microphone. After modulation takes place the carrier and
one of the sidebands are removed before amplifying the remaining
sideband for transmission.

Scott

--
"You don't go out and kick a mad dog. If you have a mad dog with
rabies, you
take a gun and shoot him."
-- Pat Robertson, TV Evangelist, about Muammar Kadhafy

Joe wrote:

Under ideal conditions what kind of range are we talking?
AM = 4-5 miles?
SSB = x miles?

Your range is really dependent more on your antenna than on your mode of
transmission, differences in legal power output aside.

Although there are height limitations for CB (20 feet above existing
structures at the antenna sight), there is nothing stopping you from
putting up an antenna that concentrates its radiated signal in one
direction, or in two directions.

Most CB antennas are omnidirectional. They radiate power equally in all
directions. Beam antennas, such as are used in outdoor TV antennas,
concentrate their power in one direction and also suppress reception of
signals coming from directions other than where they are aimed. They
also amplify signals received from the direction they are pointed in.

This results in a greater signal-to-noise ratio in the receiver and much
greater concentration of your signal in the direction of transmission,
greatly increasing your effective radiated power.

Scott
--
In buying horses and taking a wife shut your eyes tight and commend
yourself to God.

"Scott Bicknell" wrote in message
ink.net...
Darkhorse wrote:

BTW, has a raser (radio equivalent of a laser) been invented yet?

Yes, its called a beam antenna.

no. . a beam antenna is more similar to a lens.
lasers have an excited medium, that is made to dump out photons in sync.

masers do this in the microwave region, but i'm not aware of anything
reaching down anywhere near this far.

Dave VanHorn wrote:

no. . a beam antenna is more similar to a lens.
lasers have an excited medium, that is made to dump out photons in
sync.

masers do this in the microwave region, but i'm not aware of anything
reaching down anywhere near this far.

Granted, but what is the point of asking such a question. The properties
of radio frequencies below UHF prevent focused beams of energy as
narrow as a maser. Even if there were a way of generating radio waves
in the same fashion as masers, they wouldn't propagate the way maser do
anyway.

--
tax office, n.:
Den of inequity.