[BC] COMMENTS NEEDED ON THE POWER-SIDE OR THE CAM-D SYSTEMS

[Robert Meuser]

Neither are good systems.  Power side attempts to create a compatible single 
sideband signal. One of the problem is that the compatibility terms leaves the 
same bandwidth as regular DSB only displaced. The other problem is that the 
phase shift networks cause severe problems with processed audio. The system is 
hard to tune and in the end the audio is not as clean as with a regular DSB system.

Your observations are correct. Any power removed from one sideband is added to 
the other.

As for CAM-D - little is known about the system as no information has been 
released. I have heard a demo and it was not pretty. As far as I know, it is an 
adaptation of the old AM stereo system with a digital augmentation presumably 
for higher frequencies. It does not seem to carry augmented data nor offer other 
features essential for a good digital system.

IMHO any system  (that includes Ibiquity and anything analog) that attempts to 
deliver 15 kilohertz audio and stereo on MW frequencies and remain compatible 
with analog operation is just plain over reaching. This is not what the AM band 
needs at this time.

R

BOYDSIRBOYD at aol.com wrote:
> ok everyone out there who has delt with or knows either one of these systems.
> i need pros and cons of power-side system, and pros and cons of the cam-d 
> system.
> i've looked at the wave forms on a spectrum anylizer and i don't like what i 
> see.
> it seems to boost or add to the lower side band and not boost the signal as a 
> whole.
> ok now it's your turn to tell me what you think.
> i will save all e-mails and use them for my decision.
> 
> bill  wdab
> 
> p.s. the price is way way out in space
> 
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