Thread: DRM and shortwave
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Old March 1st 11, 09:06 PM posted to rec.radio.shortwave
Kevin Alfred Strom Kevin Alfred Strom is offline
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First recorded activity by RadioBanter: May 2009
Posts: 544
Default DRM and shortwave
On 3/1/2011 3:19 PM, wrote:
[...]
DRM's 10kHz wide signal is preferable to the 30 kHz wide IBLOCK mode
used on the AM band.
[...]


Yes it is. Almost anything is.

Actually, though, DRM is a solid 11 kHz wide. With its even power
distribution, it is far more annoying on HF when near a desired
signal than is even a much wider high-fidelity AM signal, which has
only intermittent high-frequency energy.

Presently TDF Issoudun relays RFI via DRM on 3965 kHz (1 kw) and BBC
Skelton uses 250 kW of DRM on 3955. Both, especially the BBC, play
havoc with US amateur operations on 75 meters.


With all good wishes,


Kevin, WB4AIO.
--
http://nationalvanguard.org/
http://kevinalfredstrom.com/
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