General Category > Huh?

China Adopts DRM Standard to Modernize AM Radio Bands? Another RW rip...

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ThaDood:
https://www.radioworld.com/tech-and-gear/digital-radio/china-adopts-drm-standard-to-modernize-am-radio-bands      Well, at least China is taking an initiative here. The only way that you'll see DRM in the USA is Part #15 experimenters.

NQC:
Hey Dood,

Hmmmm... DRM ( again).  I personally have  NO dog in the fight about DRM  ( knock yourself out if you want to try and sell it-IN CHINA , NOT here). But it seems the world has gone around with DRM a few times and basically the overall opinion  seems  it's a solution in search of  a problem .

Analog AM  on 530 to 1710 Kc ( from a technical -but maybe not COMMERCIAL -standpoint) works well and is fairly forgiving in mediocre (or sometimes WORSE) conditions .Unless conditions are strong and stable, good luck on DRM.

We had a  "regional" station (WSRO) on 650. They  kind of bothered me, since they QRM''ed WSM and couldn't be nulled out. But that was MY problem . SRO  had license and SM is NOT protected up here ( to Boston). Too bad , so sad for me . SRO thrashed around for years trying to find an audience and allegedly didn't reduce power at night either out of "desperation". Then they went ALL digital, despite warnings that their audience would go from ultra low to  to essentially ZERO.

They ran all  digital for a few months . OK , if you run legit Co channel AM, fine. But if you operate a  digital noise jammer that near zero  folks can hear ,on a Frq with AM on it as well,  that kind of bothered me .Station folded , went off air. The antenna site land is too valuable.

DRM on HF seems even more of a no go. With fading and who knows what other type of subtle physics problems it seems like a much worse bet than strong local  AM broadcast band DRM . This is why nearly NO big SW stations used it .I can't figure out why ANY of them ever  even tried it .

SW b'casting is down 95% or better from the peak time years ago. The stations that ARE left on the air would be wise NOT to mess with DRM  technology that would render nearly all of the receivers out there obsolete.

NQC

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