DRM and shortwave
On Mar 1, 1:06*pm, Kevin Alfred Strom
wrote:
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/
Thanks for this, guys. I listen to AM rarely, so I don't get much
Ibiquitude.
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