K2 Noise Blanker Problem (Feature?)
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Hi Gary, I finally discovered what the NB was doing on every other
threshhold change. What I had perceived as a drop in level was actually the DSP Noise Reduction being turned on and off. Each time the NB is switched from low to high threshhold, the DSP NR is either turned on or off depending on its present state. I guess I should consider this a bonus, since I only have to push one key (albeit twice) for NR instead of pushing Display and Band+. Now though, I'm wondering if this behaviour is unique to my K2 or if any with both Noise Blanker and DSP installed exhibit the same? You said you didn't hear any change on yours when cycling NB threshhold, but did that K2 also have DSP installed? I'll post this to the list also - maybe someone else can verify whether this is unique to mine or common to all... -- 73, Bob Patten, N4BP Plantation, FL E-Mail: [hidden email] Website: http://www.qsl.net/n4bp QRP ARCI #3412 SOC #1 ARS #799 SMIRK #6625 FISTS #7871 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Hello Bob!
> Hi Gary, I finally discovered what the NB was doing on every other > threshhold change. What I had perceived > as a drop in level was actually the DSP Noise Reduction being turned on > and off... > I'll post this to the list also - maybe someone else can verify whether > this is unique to mine or common to all... Back in the summer of '03 this was a problem which was solved through a tweak in the KDSP2 code and in some cases a component change to the K2. It occurred with K2s below serial number 3000, and mostly when they were using an external KAT100 as I recall. What is the serial number of your K2, its firmware version, and the DSP firmware version? Do you have an external KPA100 and/or a KAT100 attached when this symptom is observable? 73, Lyle KK7P _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: K2 Noise Blanker Problem (Feature?)
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In reply to this post by N4BP
Hi Bob. I tried switching the NB threshold and it has no effect on the NR on
my K2 s/n 5022. Harvey KN6VP ----- Original Message ----- From: "Bob Patten" <[hidden email]> To: <[hidden email]>; "Elecraft Reflector" <[hidden email]>; "Lyle Johnson" <[hidden email]> Sent: Sunday, April 09, 2006 10:44 AM Subject: [Elecraft] K2 Noise Blanker Problem (Feature?) > Hi Gary, I finally discovered what the NB was doing on every other > threshhold change. What I had perceived > as a drop in level was actually the DSP Noise Reduction being turned on > and off. Each time the NB is switched from > low to high threshhold, the DSP NR is either turned on or off depending on > its present state. I guess I should > consider this a bonus, since I only have to push one key (albeit twice) > for NR instead of pushing Display > and Band+. Now though, I'm wondering if this behaviour is unique to my > K2 or if any with both Noise Blanker > and DSP installed exhibit the same? You said you didn't hear any change > on yours when cycling NB threshhold, but > did that K2 also have DSP installed? > > I'll post this to the list also - maybe someone else can verify whether > this is unique to mine or common to all... > > -- > 73, Bob Patten, N4BP Plantation, FL > > E-Mail: [hidden email] Website: http://www.qsl.net/n4bp > QRP ARCI #3412 SOC #1 ARS #799 SMIRK #6625 FISTS #7871 > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: K2 Noise Blanker Problem (Feature?)
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Hi Harvey,
This is for you. As I said before on this list, If you are having QRN, try turning on the KNB2. On some types, particularly anoying kind kind that sounds like frying bacon, it works superbly. But it doesn't work for all kinds of QRN in my experience. No noise blanker does. I always try changing the threshhohd as well. Most of the time I notice no change, but sometimes it makes the difference between being able to copy a signal and not. Of course, this assumes that your KNB2 is correctly built. 73, John (W2GW) ----- Original Message ----- From: "Harvey Howell" <[hidden email]> To: "Bob Patten" <[hidden email]>; <[hidden email]>; "Elecraft Reflector" <[hidden email]>; "Lyle Johnson" <[hidden email]> Sent: Sunday, April 09, 2006 8:51 PM Subject: Re: [Elecraft] K2 Noise Blanker Problem (Feature?) > Hi Bob. I tried switching the NB threshold and it has no effect on the NR > on my K2 s/n 5022. > > Harvey KN6VP > > ----- Original Message ----- > From: "Bob Patten" <[hidden email]> > To: <[hidden email]>; "Elecraft Reflector" > <[hidden email]>; "Lyle Johnson" <[hidden email]> > Sent: Sunday, April 09, 2006 10:44 AM > Subject: [Elecraft] K2 Noise Blanker Problem (Feature?) > > >> Hi Gary, I finally discovered what the NB was doing on every other >> threshhold change. What I had perceived >> as a drop in level was actually the DSP Noise Reduction being turned on >> and off. Each time the NB is switched from >> low to high threshhold, the DSP NR is either turned on or off depending >> on its present state. I guess I should >> consider this a bonus, since I only have to push one key (albeit twice) >> for NR instead of pushing Display >> and Band+. Now though, I'm wondering if this behaviour is unique to my >> K2 or if any with both Noise Blanker >> and DSP installed exhibit the same? You said you didn't hear any change >> on yours when cycling NB threshhold, but >> did that K2 also have DSP installed? >> >> I'll post this to the list also - maybe someone else can verify whether >> this is unique to mine or common to all... >> >> -- >> 73, Bob Patten, N4BP Plantation, FL >> >> E-Mail: [hidden email] Website: http://www.qsl.net/n4bp >> QRP ARCI #3412 SOC #1 ARS #799 SMIRK #6625 FISTS #7871 >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 >> >> > > > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/2006 > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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