Radio Puzzler no.5
 

Name a common radio signal that uses double sideband - suppressed carrier
modulation

--
Keyboard to you

"Keyboard In The Wilderness" wrote in message
news:0gU7d.41225$aW5.23323@fed1read07...
Name a common radio signal that uses double sideband - suppressed carrier
modulation

Don't some of the VOA broadcasts (feeders) use this method? A different
language on each sideband as I recall.

May have -- but there is a very common broadcast mode that uses DSB
suppressed carrier

--
Keyboard to you


"DesignGuy" wrote in message
news:LsU7d.313587$Fg5.213089@attbi_s53...

"Keyboard In The Wilderness" wrote in message
news:0gU7d.41225$aW5.23323@fed1read07...
Name a common radio signal that uses double sideband - suppressed
carrier
modulation

Don't some of the VOA broadcasts (feeders) use this method? A different
language on each sideband as I recall.

"Keyboard In The Wilderness" wrote in message
news:lAU7d.41233$aW5.23119@fed1read07...
May have -- but there is a very common broadcast mode that uses DSB
suppressed carrier



Number stations sometimes use this mode.

--
Simon Mason
Anlaby
East Yorkshire.
53°44'N 0°26'W
http://www.simonmason.karoo.net

It is of course the stereo portion of an ordinary FM station.

VEry good -- correct

--
Keyboard to you


"Nilla Wafer" wrote in message
...
On Sun, 3 Oct 2004 07:45:16 -0700, "Keyboard In The Wilderness"
wrote:

Name a common radio signal that uses double sideband - suppressed carrier
modulation.

In the process of generating an FM stereo composite signal, the L-R
(left minus right) component of the audio is used to produce a double
sideband suppressed carrier signal with a center frequency of 38 KHz.
However, in the end, this signal is mixed with the L+R component,
the 19 KHz pilot, and is used to frequency modulate the main carrier.
So, it's all FM in the end.

Nilla