Szczepan Bialek wrote:
"Well, it's like this. The story starts in 1915, when mankind discovered
sidebands. Now possessing this superior understanding of the AM signal,
radio scientists began to understand the implications of their discovery.
Soon afterwards, our old friends at Bell Labs, who have discovered
practically everything, developed a method for removing one of the sidebands
of an AM signal but retaining all the essential modulation components. As an
expert of that day supposedly said, "both sidebands are saying the same
thing" (Goodman, 1948). " From:
http://www.hamradiomarket.com/articles/SSBHistory.htm

I was born after 1915. I am supposing that in that time was possibility to
tune to the three different frequences.
Am I right?
S*

Nope, you are just spouting word salad gibberish as usual.

See:

http://en.wikipedia.org/wiki/Single-sideband_modulation
http://en.wikipedia.org/wiki/Bandwid...nal_processing)
http://en.wikipedia.org/wiki/Passband



--
Jim Pennino

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U¿ytkownik napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:
"Well, it's like this. The story starts in 1915, when mankind discovered
sidebands. Now possessing this superior understanding of the AM signal,
radio scientists began to understand the implications of their discovery.
Soon afterwards, our old friends at Bell Labs, who have discovered
practically everything, developed a method for removing one of the
sidebands
of an AM signal but retaining all the essential modulation components. As
an
expert of that day supposedly said, "both sidebands are saying the same
thing" (Goodman, 1948). " From:
http://www.hamradiomarket.com/articles/SSBHistory.htm

I was born after 1915. I am supposing that in that time was possibility
to
tune to the three different frequences.
Am I right?
S*

Nope, you are just spouting word salad gibberish as usual.

See:

http://en.wikipedia.org/wiki/Single-sideband_modulation
http://en.wikipedia.org/wiki/Bandwid...nal_processing)
http://en.wikipedia.org/wiki/Passband

Here are thy unrestricted signal (upper diagram). It has the three peaks:
http://en.wikipedia.org/wiki/File:Pa...schematic3.png

So in an old radio the same station was in the three places (on the scale)
close to one another.
Am I right?
S*

Szczepan Bialek wrote:

Here are thy unrestricted signal (upper diagram). It has the three peaks:
http://en.wikipedia.org/wiki/File:Pa...schematic3.png

So in an old radio the same station was in the three places (on the scale)
close to one another.
Am I right?
S*

Nope, you haven't the slightest bit of understanding of what the term
"passband" means so your question is nonsense.



--
Jim Pennino

Remove .spam.sux to reply.

U¿ytkownik napisa³ w wiadomo¶ci
...
Szczepan Bialek wrote:

Here are thy unrestricted signal (upper diagram). It has the three peaks:
http://en.wikipedia.org/wiki/File:Pa...schematic3.png

So in an old radio the same station was in the three places (on the
scale)
close to one another.
Am I right?
S*

Nope, you haven't the slightest bit of understanding of what the term
"passband" means so your question is nonsense.

"Radio receivers generally include a tunable band-pass filter with a
passband that is wide enough to accommodate the bandwidth of the radio
signal transmitted by a single station."

For me a radio is a box with the knob to rotate.
Now at FM no brakes between stations. At AM are.

What was in 1915?
S*

Nope, you haven't the slightest bit of understanding of what the term
"passband" means so your question is nonsense.

"Radio receivers generally include a tunable band-pass filter with a
passband that is wide enough to accommodate the bandwidth of the radio
signal transmitted by a single station."

That statement is at best misleading, and in some cases incorrect.

In most receivers any *tunable* filter is MUCH MUCH wider than the
bandwidth required to accommodate the bandwidth of the signal transmitted.

The selectivity being produced by one or more *fixed* frequency filters
which are just wide enough to accommodate the bandwidth of the wanted
signal.


For me a radio is a box with the knob to rotate.
Now at FM no brakes between stations. At AM are.

What was in 1915?
S*


In 1915 there were no broadcast stations to speak of so your dial
would be just one large "brake" (sic).

Jeff

"Jeff" wrote ...

Nope, you haven't the slightest bit of understanding of what the term
"passband" means so your question is nonsense.

"Radio receivers generally include a tunable band-pass filter with a
passband that is wide enough to accommodate the bandwidth of the radio
signal transmitted by a single station."

That statement is at best misleading, and in some cases incorrect.

In most receivers any *tunable* filter is MUCH MUCH wider than the
bandwidth required to accommodate the bandwidth of the signal transmitted.

The selectivity being produced by one or more *fixed* frequency filters
which are just wide enough to accommodate the bandwidth of the wanted
signal.


For me a radio is a box with the knob to rotate.
Now at FM no brakes between stations. At AM are.

What was in 1915?
S*


In 1915 there were no broadcast stations to speak of so your dial would
be just one large "brake" (sic).

"Well, it's like this. The story starts in 1915, when mankind discovered
sidebands. Now possessing this superior understanding of the AM signal,
radio scientists began to understand the implications of their discovery.
Soon afterwards, our old friends at Bell Labs, who have discovered
practically everything, developed a method for removing one of the sidebands
of an AM signal but retaining all the essential modulation components. As an
expert of that day supposedly said, "both sidebands are saying the same
thing" (Goodman, 1948). " From:
http://www.hamradiomarket.com/articles/SSBHistory.htm

If in 1915 were no broadcast stations to speak tell us what was with the
first station to speak and when it start transmitting.
S*

For me a radio is a box with the knob to rotate.
Now at FM no brakes between stations. At AM are.

What was in 1915?
S*


In 1915 there were no broadcast stations to speak of so your dial
would be just one large "brake" (sic).

"Well, it's like this. The story starts in 1915, when mankind discovered
sidebands. Now possessing this superior understanding of the AM signal,
radio scientists began to understand the implications of their discovery.
Soon afterwards, our old friends at Bell Labs, who have discovered
practically everything, developed a method for removing one of the
sidebands
of an AM signal but retaining all the essential modulation components.
As an
expert of that day supposedly said, "both sidebands are saying the same
thing" (Goodman, 1948). " From:
http://www.hamradiomarket.com/articles/SSBHistory.htm

If in 1915 were no broadcast stations to speak tell us what was with the
first station to speak and when it start transmitting.
S*


The first AM Broadcast station (as opposed to amateur or military ) was
in about 1919.

Jeff

Szczepan Bialek wrote:

If in 1915 were no broadcast stations to speak tell us what was with the
first station to speak and when it start transmitting.
S*

There were no broadcasting stations of any kind in 1915.

The first station that could even remotely be called a broadcasting station
was in 1916 and it broadcasted weather reports in morse code.

The first experimental AM broadcast stations started in 1919 and regular AM
broadcasting started in 1920 when all the spark gap morse transmitters
were shut down.


--
Jim Pennino

Remove .spam.sux to reply.

Szczepan Bialek wrote:

Użytkownik napisał w wiadomości
...
Szczepan Bialek wrote:

Here are thy unrestricted signal (upper diagram). It has the three peaks:
http://en.wikipedia.org/wiki/File:Pa...schematic3.png

So in an old radio the same station was in the three places (on the
scale)
close to one another.
Am I right?
S*

Nope, you haven't the slightest bit of understanding of what the term
"passband" means so your question is nonsense.

"Radio receivers generally include a tunable band-pass filter with a
passband that is wide enough to accommodate the bandwidth of the radio
signal transmitted by a single station."

Oh goody, you can cut and paste from a web site.

Yet you have no clue what the quote means or the implications of having
ommited any mention of the IF stages of a receiver.

For me a radio is a box with the knob to rotate.
Now at FM no brakes between stations. At AM are.

Gibberish.

What was in 1915?
S*

The battleship HMS Formidable is sunk off Lyme Regis, Dorset, England, by
a German U-Boat.

An earthquake (6.8 in Richter scale) in Avezzano, Italy, kills more than 29,000.

The 1915 locust plague breaks out in Palestine; it continues until October.

The theory of general relativity is formulated.

The first prototype tank is tested for the British Army for the first time.


--
Jim Pennino

Remove .spam.sux to reply.

On Dec 22, 12:59*pm, wrote:
What was in 1915?
S*

The battleship HMS Formidable is sunk off Lyme Regis, Dorset, England, by
a German U-Boat. --
Jim Pennino

Gallipoli landings.