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NB Question.....It says off but there is a difference..............

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Jim Bolit

NB Question.....It says off but there is a difference..............

When I set the NB level to "IF Off" and then turn the NB on and off, there
is a

Distinct difference in the audio between NB on or NB off (again with the
level set at IF Off)

Comments

Tnx

Jim

W6AIM

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Oliver Dröse

Re: NB Question.....It says off but there is a difference..............

Might it be you still have the DSP NB on, Jim? There are 2 different
settings for the IF (hardware) and DSP NB ...

73, Olli

Contest, DX & radio projects: http://www.dh8bqa.de

Am 10.11.2015 um 22:31 schrieb jim:

> When I set the NB level to "IF Off" and then turn the NB on and off, there
> is a
>
> Distinct difference in the audio between NB on or NB off (again with the
> level set at IF Off)
>
>
>
> Comments
>
>
>
> Tnx
>
>
>
> Jim
>
> W6AIM
>
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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Guy Olinger K2AV

Re: NB Question.....It says off but there is a difference..............

The DSP and IF noise blanking are distinct and operate in series when both
are on.

IF NB shuts off the IF for a very short time when spike is detected. The
timing and width of that depends on the IF setting. The DSP NB does various
things in the number soup after the analog to digital converter.

The NB button toggles either or both IF DSP NB depending if either type is
OFF in the settings.

DSP 2-7 and IF narrow 4 on at the same time take out my particular
160m power buzz that comes and goes around here. Good for four s-units of
suppression which gets us back down to the regular nighttime S4 cr*p. Same
radio at other locations takes other settings to handle THEIR particular
noise.

73, Guy K2AV

On Tuesday, November 10, 2015, Oliver Dröse <[hidden email]> wrote:

> Might it be you still have the DSP NB on, Jim? There are 2 different
> settings for the IF (hardware) and DSP NB ...
>
> 73, Olli
>
> Contest, DX & radio projects: http://www.dh8bqa.de
>
>
> Am 10.11.2015 um 22:31 schrieb jim:
>
>> When I set the NB level to "IF Off" and then turn the NB on and off, there
>> is a
>>
>> Distinct difference in the audio between NB on or NB off (again with the
>> level set at IF Off)
>>
>>
>> Comments
>>
>>
>> Tnx
>>
>>
>> Jim
>>
>> W6AIM
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

Jim Bolit

Re: NB Question.....It says off but there is a difference..............

Guys and Girls,

Thanks for pointing me in the right direction.

I will finish the RTFM and look at Fred's book.

I recently got the radio back from Elecraft and the settings were re-set to factory. I was not aware of two NB's in the receiver.

Thanks for all the help!

Jim
W6AIM

.

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Guy Olinger K2AV
Sent: Wednesday, November 11, 2015 7:17 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] NB Question.....It says off but there is a difference..............

The DSP and IF noise blanking are distinct and operate in series when both are on.

IF NB shuts off the IF for a very short time when spike is detected. The timing and width of that depends on the IF setting. The DSP NB does various things in the number soup after the analog to digital converter.

The NB button toggles either or both IF DSP NB depending if either type is OFF in the settings.

DSP 2-7 and IF narrow 4 on at the same time take out my particular 160m power buzz that comes and goes around here. Good for four s-units of suppression which gets us back down to the regular nighttime S4 cr*p. Same radio at other locations takes other settings to handle THEIR particular noise.

73, Guy K2AV

On Tuesday, November 10, 2015, Oliver Dröse <[hidden email]> wrote:

> Might it be you still have the DSP NB on, Jim? There are 2 different
> settings for the IF (hardware) and DSP NB ...
>
> 73, Olli
>
> Contest, DX & radio projects: http://www.dh8bqa.de
>
>
> Am 10.11.2015 um 22:31 schrieb jim:
>
>> When I set the NB level to "IF Off" and then turn the NB on and off,
>> there is a
>>
>> Distinct difference in the audio between NB on or NB off (again with
>> the level set at IF Off)
>>
>>
>> Comments
>>
>>
>> Tnx
>>
>>
>> Jim
>>
>> W6AIM
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email list: http://www.qsl.net/donate.html Message delivered to
>> [hidden email]
>>
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]
>

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