Re: [IRCA] Housing the RF-Space SDR-IQ

["Guy Atkins" <dx@xxxxxxxxxxxxx>]

Hi Patrick,

The potential exists in SDR-type radios to have phenomenal noise blankers. I
know that the twin NBs in my own SDR-1000 are excellent. One is intended for
short duration pulses (like electric fence clicks) and the other for longer
buzzes & noises. Both of these blankers can have their threshold level
(sensitivity) adjusted easily through a software dialog box.

The noise blankers in the SDR-1000 "look" at the signal before and after the
noise burst, notches out the noise, and then-- (here comes the clever
part)-- insert a COPY of a brief moment of the "good" signal into the empty
spot left by the notched-out noise pulse. The result is the best noise
blanking action I personally have encountered in a receiver.

The SDR-IQ and SDR-14 could have the same performance level if the author of
the SpectraVue software would update his program with a similar approach to
noise blanking.

Such are the benefits of these new software-defined radios. Manufacturers of
traditional rigs can't upgrade their product with an easily distributed
software package or version upgrade; ie., once a Drake R-8, Rev. A, always a
Drake R-8, Rev. A...

73,

Guy Atkins
Puyallup, WA


------------------------------

Message: 4
Date: Tue, 2 Oct 2007 19:13:50 -0700
From: mwdxer@xxxxxxxxx (Patrick Martin)
Subject: Re: [IRCA] Housing the RF-Space SDR-IQ
To: rmoore5@xxxxxxxxxxxxx, irca@xxxxxxxxxxxxxxxx (Mailing list for the
	International Radio Club of America)
Message-ID: <28216-4702FADE-7922@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: Text/Plain; Charset=US-ASCII

Thanks Rob for the info on the SDR-IQ. However, before I would invest in
one, it would need a good noise blanker. Otherwise is is rather useless
here. The clicking of the nearby electric fence would drive me nuts. All
three of my receivers have NB.

73,

Patrick

Patrick Martin
KAVT Reception Manager



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