[Elecraft] K3s in WPX M/S - WOW!

[n4lq]

Confused.....What is FIR vs. IIR? Can't find it in the manual. When you say 
"just these two bandwidths"...I thought the FLxBW settings were for the 
crystal filters, not the DSP so how do you change this setting for 50hz when 
it's not even a filter in the menu? Since I have the 200hz filter in slot 4, 
do I change it to IIR on?
Steve Ellington
N4LQ at insightbb.com
----- Original Message ----- 
From: "Vic Rosenthal" <vic at rakefet.com>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Tuesday, May 27, 2008 2:01 PM
Subject: Re: [Elecraft] K3s in WPX M/S - WOW!


> Bob Evans wrote:
>>   I
>> never thought I'd be so happy with a 150 Hz filter bandwidth.  Honestly, 
>> the
>> 100 Hz and 50 Hz bandwidths were useless though as the signal level 
>> dropped
>> significantly.  It seemed much better a few firmware versions ago, but 
>> 150
>> Hz worked fine for us...I was just getting "greedy" by trying to use the 
>> 100
>> and 50 Hz BW.
>
> I have just found out that there is a bug that causes a gain reduction
> just for these two bandwidths if they are set for FIR filters and not IIR.
>
> You can fix it now by switching IIR ON, and when Elecraft fixes the bug
> you can choose either IIR or FIR for these filters as you prefer.
>
> To switch between IIR and FIR, tap '7' on the keypad when you're in any
> filter setup menu entry (e.g., CONFIG:FLx BW). You want it to say IIR ON.
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
>
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