I'm not clear on marine SSB radios. Can someone explain how they differ from
standard VHF? A friend is now offering me a pretty expensive Icom SSB. I doubt
I have a need for it, but it's basically free. I may just tell him to sell it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat which would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper and lowers?

Thanks in advance...

RB

VHF radio is FM which is the modulation of a sine wave carrier so that the
instantaneous frequency differs from the carrier frequency by an amount
proportionate to the instantaneous amplitude of the modulating wave.

Single sidebandband suppressed carrier modulation is a form of amplitude
modulation whereas the carrier frequency and one sideband of the modulated
carrier is suppressed.

For S/N the NBFM (VHF) performance is the same as DSB-AM in the presence of
white noise. The SSB performance is superior to both and to SSB-AM because
all the signal power is is placed into a narrower spectral band than the
former.

SSB detection requires the use of synchronous demodulation, preferably with
phase synchronization, otherwise a Donald Duck type voice appears.

Since you never venture far offshore, dixie cups with strings will provide
more than adequate performance.

RB

"Bobsprit" wrote in message
...

I'm not clear on marine SSB radios. Can someone explain how they differ
from
standard VHF? A friend is now offering me a pretty expensive Icom SSB. I
doubt
I have a need for it, but it's basically free. I may just tell him to sell
it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat which
would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper and
lowers?

Thanks in advance...

RB

Since you never venture far offshore, dixie cups with strings will provide
more than adequate performance.


I already have top of the line Icon Dixie cups, #151V, but thanks!

RB

Gilligan,

Could you possibly switch to another personality... it's just too
confusing to read two totally different viewpoints from bob... one
rational, the other foolish and stupid.

"Bobsprit" wrote in message
ink.net...
VHF radio is FM which is the modulation of a sine wave carrier so that the
instantaneous frequency differs from the carrier frequency by an amount
proportionate to the instantaneous amplitude of the modulating wave.

Single sidebandband suppressed carrier modulation is a form of amplitude
modulation whereas the carrier frequency and one sideband of the modulated
carrier is suppressed.

For S/N the NBFM (VHF) performance is the same as DSB-AM in the presence
of
white noise. The SSB performance is superior to both and to SSB-AM because
all the signal power is is placed into a narrower spectral band than the
former.

SSB detection requires the use of synchronous demodulation, preferably
with
phase synchronization, otherwise a Donald Duck type voice appears.

Since you never venture far offshore, dixie cups with strings will provide
more than adequate performance.

RB

"Bobsprit" wrote in message
...

I'm not clear on marine SSB radios. Can someone explain how they differ
from
standard VHF? A friend is now offering me a pretty expensive Icom SSB. I
doubt
I have a need for it, but it's basically free. I may just tell him to
sell
it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat which
would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper and
lowers?

Thanks in advance...

RB

I was getting confused too.



"Jonathan Ganz" wrote in message
...
Gilligan,

Could you possibly switch to another personality... it's just too
confusing to read two totally different viewpoints from bob... one
rational, the other foolish and stupid.

"Bobsprit" wrote in message
ink.net...
VHF radio is FM which is the modulation of a sine wave carrier so that
the
instantaneous frequency differs from the carrier frequency by an amount
proportionate to the instantaneous amplitude of the modulating wave.

Single sidebandband suppressed carrier modulation is a form of amplitude
modulation whereas the carrier frequency and one sideband of the
modulated
carrier is suppressed.

For S/N the NBFM (VHF) performance is the same as DSB-AM in the presence
of
white noise. The SSB performance is superior to both and to SSB-AM
because
all the signal power is is placed into a narrower spectral band than the
former.

SSB detection requires the use of synchronous demodulation, preferably
with
phase synchronization, otherwise a Donald Duck type voice appears.

Since you never venture far offshore, dixie cups with strings will
provide
more than adequate performance.

RB

"Bobsprit" wrote in message
...

I'm not clear on marine SSB radios. Can someone explain how they
differ
from
standard VHF? A friend is now offering me a pretty expensive Icom SSB.
I
doubt
I have a need for it, but it's basically free. I may just tell him to
sell
it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat
which
would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper
and
lowers?

Thanks in advance...

RB

Thanks

"Milos Forman" wrote in message
nk.net...
I was getting confused too.



"Jonathan Ganz" wrote in message
...
Gilligan,

Could you possibly switch to another personality... it's just too
confusing to read two totally different viewpoints from bob... one
rational, the other foolish and stupid.

"Bobsprit" wrote in message
ink.net...
VHF radio is FM which is the modulation of a sine wave carrier so that
the
instantaneous frequency differs from the carrier frequency by an
amount
proportionate to the instantaneous amplitude of the modulating wave.

Single sidebandband suppressed carrier modulation is a form of
amplitude
modulation whereas the carrier frequency and one sideband of the
modulated
carrier is suppressed.

For S/N the NBFM (VHF) performance is the same as DSB-AM in the
presence
of
white noise. The SSB performance is superior to both and to SSB-AM
because
all the signal power is is placed into a narrower spectral band than
the
former.

SSB detection requires the use of synchronous demodulation, preferably
with
phase synchronization, otherwise a Donald Duck type voice appears.

Since you never venture far offshore, dixie cups with strings will
provide
more than adequate performance.

RB

"Bobsprit" wrote in message
...

I'm not clear on marine SSB radios. Can someone explain how they
differ
from
standard VHF? A friend is now offering me a pretty expensive Icom
SSB.
I
doubt
I have a need for it, but it's basically free. I may just tell him
to
sell
it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat
which
would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper
and
lowers?

Thanks in advance...

RB

One important point should be recognized.

FM radios draw full transmit current the moment
the micorphone is keyed up.

SSB radios only draw standby power until the
operator speaks--ie no extra power is drawn
until the voice signal is modulated. This
saves battery power.

So not only is more power put into the signal
with SSB, but your batteries are saved when
you are not speaking.

One disadvantage is that it can be difficult
to tell when the other party you are speaking
with has stopped talking.

It is easy to tell when the other party stops
transmitting on FM because the carrier will
drop. If your squelch is set correctly you
will hear nothing and if the squelch circuit
is open, you will hear static or background
signals which will be oticably different
from a full carrier signal.

So proper operating procedure with SSB is to
put the word "Over" or "Back to you" at the end
of each transmission. Some radios have what is
called a "Roger Beep" that is transmitted when
the microphone is unkeyed.

Bart Senior


"Bobsprit" wrote

VHF radio is FM which is the modulation of a sine wave carrier so that the
instantaneous frequency differs from the carrier frequency by an amount
proportionate to the instantaneous amplitude of the modulating wave.

Single sidebandband suppressed carrier modulation is a form of amplitude
modulation whereas the carrier frequency and one sideband of the modulated
carrier is suppressed.

For S/N the NBFM (VHF) performance is the same as DSB-AM in the presence of
white noise. The SSB performance is superior to both and to SSB-AM because
all the signal power is is placed into a narrower spectral band than the
former.

SSB detection requires the use of synchronous demodulation, preferably with
phase synchronization, otherwise a Donald Duck type voice appears.

Since you never venture far offshore, dixie cups with strings will provide
more than adequate performance.

RB

"Bobsprit" wrote

I'm not clear on marine SSB radios. Can someone explain how they differ
from
standard VHF? A friend is now offering me a pretty expensive Icom SSB. I
doubt
I have a need for it, but it's basically free. I may just tell him to sell
it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat which
would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper and
lowers?

Thanks in advance...

RB

However, when you use your SSB to transmit email with a Pactor TNC using
Pactor III mode, you will be running at almost 100% duty cycle and
drawing close to full transmit current while the email is going out.
Kelton
s/v Isle Escape

N1EE wrote:

One important point should be recognized.

FM radios draw full transmit current the moment
the micorphone is keyed up.

SSB radios only draw standby power until the
operator speaks--ie no extra power is drawn
until the voice signal is modulated. This
saves battery power.

So not only is more power put into the signal
with SSB, but your batteries are saved when
you are not speaking.

One disadvantage is that it can be difficult
to tell when the other party you are speaking
with has stopped talking.

It is easy to tell when the other party stops
transmitting on FM because the carrier will
drop. If your squelch is set correctly you
will hear nothing and if the squelch circuit
is open, you will hear static or background
signals which will be oticably different
from a full carrier signal.

So proper operating procedure with SSB is to
put the word "Over" or "Back to you" at the end
of each transmission. Some radios have what is
called a "Roger Beep" that is transmitted when
the microphone is unkeyed.

Bart Senior


"Bobsprit" wrote


VHF radio is FM which is the modulation of a sine wave carrier so that the
instantaneous frequency differs from the carrier frequency by an amount
proportionate to the instantaneous amplitude of the modulating wave.

Single sidebandband suppressed carrier modulation is a form of amplitude
modulation whereas the carrier frequency and one sideband of the modulated
carrier is suppressed.

For S/N the NBFM (VHF) performance is the same as DSB-AM in the presence of
white noise. The SSB performance is superior to both and to SSB-AM because
all the signal power is is placed into a narrower spectral band than the
former.

SSB detection requires the use of synchronous demodulation, preferably with
phase synchronization, otherwise a Donald Duck type voice appears.

Since you never venture far offshore, dixie cups with strings will provide
more than adequate performance.

RB

"Bobsprit" wrote

I'm not clear on marine SSB radios. Can someone explain how they differ

from

standard VHF? A friend is now offering me a pretty expensive Icom SSB. I

doubt

I have a need for it, but it's basically free. I may just tell him to sell

it

on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat which

would

be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper and

lowers?

Thanks in advance...

RB

"Bob****" wrote ...

I'm not clear on marine SSB radios.

one more for the list


Can someone explain how they differ from
standard VHF? A friend is now offering me a pretty expensive Icom SSB.

A n00bie would ask, ''why don't you ask your 'friend' to splain it?''. The
rest of us realize this is yet one more in a long line of lame trolls form
the master bull****ter.

SV

On 14 Dec 2003 14:48:40 GMT, (Bobsprit) wrote this
crap:


I'm not clear on marine SSB radios. Can someone explain how they differ from
standard VHF? A friend is now offering me a pretty expensive Icom SSB. I doubt
I have a need for it, but it's basically free. I may just tell him to sell it
on ebay. I was thinking of adding a AM/SSB (CB) radio to the boat which would
be better than the GMRS.
So can someone explain what the marine SSB is? Is it VHF with upper and lowers?

Thanks in advance...

RB

How stupid are you? SSB is AM. VHF is FM.

Want me explain the difference between cable and satellite dish?




This signature is now the ultimate power in the universe