[K3] Noise blanker insertion loss

[n7ws]

I just noted that my noise blanker has an S-unit of insertion loss.

Anyone else see this?

Wes  N7WS


     
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[Dick Dickinson]

Yes...


73,

Dick - KA5KKT

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I just noted that my noise blanker has an S-unit of insertion loss.

Anyone else see this?

Wes  N7WS

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[n7ws]

Thanks. Too bad.
--- On Sun, 1/31/10, Edward Dickinson, III <[hidden email]> wrote:

From: Edward Dickinson, III <[hidden email]>
Subject: Re: [Elecraft] [K3] Noise blanker insertion loss
To: [hidden email]
Date: Sunday, January 31, 2010, 2:27 PM

Yes...


73,

Dick - KA5KKT

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I just noted that my noise blanker has an S-unit of insertion loss.

Anyone else see this?

Wes  N7WS

----------------------------------------------------------------------------
----

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[KK7P]

> I just noted that my noise blanker has an S-unit of insertion loss.

I measure 2.0 dB (AGC OFF, using AFV/dBV internal functions and
monitoring a steady nominal S5 carrier on 6 meters).

73,

Lyle KK7P
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[Brett Howard]

I just got done using that feature to measure filter flatness for
someone...  Gotta admit thats a VERY handy feature!

~Brett

On Sun, 2010-01-31 at 16:31 -0800, Lyle Johnson wrote:

> > I just noted that my noise blanker has an S-unit of insertion loss.
>
> I measure 2.0 dB (AGC OFF, using AFV/dBV internal functions and
> monitoring a steady nominal S5 carrier on 6 meters).
>
> 73,
>
> Lyle KK7P
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
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[Joe Planisky]

Nearly the same here (-2.2dB), but only when the IF NB is used.  No  
loss at all with just the DSP NB engaged.

73
--
Joe KB8AP

On Jan 31, 2010, at 4:31 PM, Lyle Johnson wrote:

>
>> I just noted that my noise blanker has an S-unit of insertion loss.
>
> I measure 2.0 dB (AGC OFF, using AFV/dBV internal functions and
> monitoring a steady nominal S5 carrier on 6 meters).
>
> 73,
>
> Lyle KK7P
> ______________________________________________________________
> 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
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[n7ws]

Thanks Lyle,

I put my stepped attenuator in the line between the K3 and the XG2 and checked the S-meter.  The way I had it calibrated, a 3dB step took it from S9 down to S8.  I re-calibrated the S-meter offset until the meter read S9 and a 6dB step was required to take it to S8.  (Offset value went from 22 down to 20)

Now I don't see an S-unit of change with the blanker in and out and using your method, I read 2.8 dB of insertion loss.  Higher than yours but not quite as troublesome.

Regards,

Wes  N7WS

--- On Sun, 1/31/10, Lyle Johnson <[hidden email]> wrote:

From: Lyle Johnson <[hidden email]>
Subject: Re: [Elecraft] [K3] Noise blanker insertion loss
To: "Wes Stewart" <[hidden email]>
Cc: [hidden email], "IIIEdward Dickinson" <[hidden email]>
Date: Sunday, January 31, 2010, 5:31 PM


> I just noted that my noise blanker has an S-unit of insertion loss.

I measure 2.0 dB (AGC OFF, using AFV/dBV internal functions and monitoring a steady nominal S5 carrier on 6 meters).

73,

Lyle KK7P



     
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[n7ws]

Correct.  You can turn blanking on with the front panel switch and go to the setup function and dial it in and out with the knob and listen for the relay click.

--- On Sun, 1/31/10, Joe Planisky <[hidden email]> wrote:

From: Joe Planisky <[hidden email]>
Subject: Re: [Elecraft] [K3] Noise blanker insertion loss
To: "Lyle Johnson" <[hidden email]>
Cc: "Wes Stewart" <[hidden email]>, [hidden email], "IIIEdward Dickinson" <[hidden email]>
Date: Sunday, January 31, 2010, 6:32 PM

Nearly the same here (-2.2dB), but only when the IF NB is used.  No 
loss at all with just the DSP NB engaged.

73
--
Joe KB8AP

On Jan 31, 2010, at 4:31 PM, Lyle Johnson wrote:

>
>> I just noted that my noise blanker has an S-unit of insertion loss.
>
> I measure 2.0 dB (AGC OFF, using AFV/dBV internal functions and
> monitoring a steady nominal S5 carrier on 6 meters).
>
> 73,
>
> Lyle KK7P
> ______________________________________________________________
> 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

     
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