[Elecraft] 4.48 vs 4.51 CW Decode

[Matthew Zilmer]

Contests aren't the best setting for CW decode, imho.  However, if you tune the CW slightly higher than the CWT indicates it seems to improve decoding when there is band noise present.  If you minimize the passband to 50 or 100 Hz, this also helps reduce noise in the decode channel.  With the passband minimized, the decoder gets good results with the CW and CWT matching.

Matt Zilmer
Consultant - Product Management Dept.
Magellan Navigation / MiTAC Digital Corp.
Tel: (909) 394-6052
Cell: (909) 730-6552
Si fractum non sit, noli id reficere


-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Hisashi T Fujinaka
Sent: Friday, June 29, 2012 10:47 AM
To: W5RDW
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] 4.48 vs 4.51 CW Decode

On Fri, 29 Jun 2012, W5RDW wrote:

> When I first installed 4.51, I had to fiddle around with a few 
> adjustments for the decode function to work as before, primarily 
> adjusting THR lower. It seemed 4.48 liked a THR of 7, but now 4.51 
> seems to like a THR of 3. I have the AGC THC at 10 or so. Also, I 
> always use the SPOT function to get the received signal in the proper place to decode.

Does anyone have any other pointers? I never have been able to get the decoder to do much for me, even during a contest.

--
Hisashi T Fujinaka - htodd at twofifty.com
BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ______________________________________________________________
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