[BC] HD AM radio versus AM Stereo

[Kevin Tekel]

Steve wrote:
> We tested the Kahn system at KFRC in San Francisco. During one of the
> tests we went up into the Sierra's and even though our signal by then
> was iffy you got it in stereo. That's what I liked about the Kahn
system.
> If you could get the signal it WAS in Stereo.

With Sony's "forced stereo" receivers, the signal is received in stereo
mode as long as the AM Stereo decoder's PLL can lock onto it, regardless
of which system is in use.  Even mono signals are received in stereo mode,
which provides a handy way to hear if any stations are suffering from IPM
(incidental phase modulation).  When the Expanded Band was new, I often
heard signals from over 1000 miles away in full C-Quam AM Stereo using
only the built-in antenna of my Sony AM Stereo Walkman.

> The rest is history. Well at least we've done one thing right (as far as
> I know and if I'm wrong please correct me) the best system for FM Stereo
> was the one that won the prize and was accepted by the FCC.

Ever hear of multipath? :-)




		
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