K9MA: "It seems likely we hams have the toughest receiver dynamic range
requirements on the planet."
Good point, Scott. I can, however, think of a few instances where
commercial systems have to perform very well in dense communications
environments. The "Mobile Command Centers" used by many public safety
agencies are often jam packed with transceivers operating close-in in-band,
out-of-band, HF, VHF, UHF, 800 mHz etc, while deployed to remote areas. All
the antennas are in close proximity, usually on the roof of the vehicle.
Many years back I was Communications Coordinator for a very large fair and
air show held on the St. Louis riverfront each summer. Housed in a nearby
hotel ball room were folks manning transceivers for St. Louis City PD,
Missouri State Highway Patrol, FAA, U.S. Coast Guard, Illinois State Police,
Mo State Water Patrol, Secret Service (big shot visitors), ATF, the Air Show
Boss and Red Cross, State Emergency Management, just to name a few. All
these agencies had top notch communications equipment and all the antennas
were somewhere on a nearby patio/veranda overlooking the fair site. We had
bags full of notch filters, cavities, band pass devices etc that were put to
good use during the weekend fair as Murphy reared his ugly head.
Terry, W0FM
-----Original Message-----
From: Scott Ellington [mailto:
[hidden email]]
Sent: Friday, April 15, 2011 12:58 PM
To: Elecraft list
Subject: Re: [Elecraft] XG3 device...
Is there any other communication system that requires the kind of close-in
dynamic range we do? It certainly wouldn't make much sense to design a
commercial system with such requirements. It seems likely we hams have the
toughest receiver dynamic range requirements on the planet.
Scott K9MA
On Apr 15, 2011, at 12:30 PM, Guy Olinger K2AV wrote:
> Of course, if we didn't want to be able to copy with equal clarity
> over a > 100 dB input signal range, we could dispense with a lot of
> this. AND do that with signals of the extremes separated by a mere 250
> Hz. We are so picky. Why does anyone put up with us :>)
Scott Ellington
Madison, Wisconsin
USA
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