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KB2VXA > TECH 02.03.04 13:14l 39 Lines 1508 Bytes #999 (0) @ WW
BID : 20968_WT3V
Read: DB0FHN GUEST OE7FMI
Subj: Re: G8MNY > MOD RADAR
Path: DB0FHN<DB0RGB<DB0AAB<DB0FSG<HB9EAS<HB9AK<K1UOL<K1UOL<WA2PNU<KC2COJ<
WT3V
Sent: 040301/2350Z @:WT3V.#CNJ.NJ.USA.NOAM #:20968 [Lakehurst] $:20968_WT3V
From: KB2VXA@WT3V.#CNJ.NJ.USA.NOAM
To : TECH@WW
Hi John and readers,
The ATV Radar QRM is a strange one, since they share the 70cM band it's
simply a matter of which one has primary allocation. Somebody at the RA
goofed! In the US there are certain "silent zones" where such radar is in
use, primarily drug interdiction radar along the Canadian border. There
are a few in the West where military testing is done and aldo near
radiotelescopes where TI is bad enough without some Ham being mistaken
for ET.
As for the windmill problem, it's understandable how radar scatter by the
rotating blades can cause false echoes, but I suppose the software could
be set to ignore them.
Yes, there are ways to get around problems and they're usually easy to
resolve. In the case of the ATV vestigial sideband showing up at
Heathrow, simply moving the repeater to the next 23cM channel would solve
the problem much easier than the airport redesigning the whole system.
The ATCs rule, safety is the primary concern so interference to
aeronautical systems is given strict attention. That's why every year
there are survey planes flying around looking for cable TV egress, they
share the same bands.
73 de Warren, KB2VXA@WT3V.#CNJ.NJ.USA.NOAM
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Message timed by cesium laser: 23:58 on 2004-Mar-01 GMT
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