[Elecraft] K3 AGC Mush

[Jan Erik Holm]

This is exactly what I have noticed too. Not even 10 signals
are needed either.
/SM2EKM
-------------------------------------------
On 2011-12-04 20:53, Merv Schweigert wrote:
>
>> Also, in the heat of the contest or DX pile up most reporters do not
>> recall how they had their AGC parameters set (threshold, slope, AGC
>> decay soft/hard, fast or slow, and fast/slow settings etc. If you can
>> let us know your complete set up for AGC parameters, if you are using
>> headphones or speakers,  the signal strengths, CW or SSB, RX b/w, what
>> different settings you tried etc., that will be extremely helpful.
>>
> AGC DCY  =  NOR
> AGG HLD  =  20
> AGC PLS  =  NOR
> AGC SLP  = 000
> AGC THR =  008
> AGC F      = 200
> AGC S     = 020
>
> Headphones and speaker, no difference
> signals S3-S4 range
> CW
> all bandwidths,  use mostly 400hz and narrower.
> Tried AGC DCY = SOFT  (have PF1 programmed to switch that in and out fast)
> ALL settings of SLP and THR
> Turning off the AGC  improves the "mush".
> Loud signals are no problem at all,  the K3 handles loud signals better than
> any radio..  its when multiple signals of about S-4 are on this occurs,
> more
> than two or three, a pile up of same strength signals.
> I can understand it may difficult to reproduce unless you have a way to
> have
> 10 signals of the same strength, close to the same freq, and keying,  just a
> carrier will not reproduce the effect,  has to be keyed signals you are
> trying
> to copy.  They turn into a single level buzz of sorts.
>
> One note - If signals are below S9+20 and turning AGC off does not help,
>> its probably not a DSP AGC or H/W AGC issue.
>>
>> Also, make sure to use the AGC Limiter menu setting to hard limit audio
>> levels if you use AGC OFF.
>>
> Never use NR or NB  and have the AGC limiter set for no AGC times.
>
> In my rough gestimation it seems that signals in the S3-S4 range need to
> not trigger
> the AGC as they do,  if one could set the THR to higher level? perhaps
> it would stop the
> problem.
> Is it possible to increase the range of SLP and THR to move the point
> where S-3 or S-4
> signals trigger the AGC?
> Thanks much Eric.    73 Merv K9FD/KH6
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>