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Useful P3 feature

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Vic Rosenthal

Useful P3 feature

Here is something I would like to see on the P3.

The P3 saves the REF LVL setting per band. But of course the noise level
on a given band varies as conditions change, and I find myself often
adjusting the REF LVL.

The optimum setting is with the REF LVL just below the noise level.
Setting it higher loses detail, and setting it lower fills the waterfall
with noise.

What I would like would be to adjust the REF LVL to optimum with respect
to the noise level and then save this relationship. Then I would like to
be able to push a function button to automatically adjust the REF LVL to
re-establish the same relationship.

This would make the readjustment, which I find myself making every few
minutes sometimes, much quicker and easier.

I don't want to save the REF LVL. I want to save its relationship to the
noise level.
--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Joe Subich, W4TV-4

Re: Useful P3 feature

> I don't want to save the REF LVL. I want to save its relationship to
> the noise level.

I agree. Put another way, I'd like to see a reverse baseline "clamp" -
something along the line of holding REF LVL 5 dB below the average
noise level.

73,

... Joe, W4TV

On 2015-03-06 7:56 AM, Vic Rosenthal 4X6GP/K2VCO wrote:

> Here is something I would like to see on the P3.
>
> The P3 saves the REF LVL setting per band. But of course the noise level
> on a given band varies as conditions change, and I find myself often
> adjusting the REF LVL.
>
> The optimum setting is with the REF LVL just below the noise level.
> Setting it higher loses detail, and setting it lower fills the waterfall
> with noise.
>
> What I would like would be to adjust the REF LVL to optimum with respect
> to the noise level and then save this relationship. Then I would like to
> be able to push a function button to automatically adjust the REF LVL to
> re-establish the same relationship.
>
> This would make the readjustment, which I find myself making every few
> minutes sometimes, much quicker and easier.
>
> I don't want to save the REF LVL. I want to save its relationship to the
> noise level.

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Guy Olinger K2AV

Re: Useful P3 feature

Wouldn't that need to be dampened a lot. What happens if there is QRN, you
wouldn't want to be pushing the real stuff down. It would NOT be a simple
function, and there would be wide variation on what seemed "slick".

73, Guy

On Fri, Mar 6, 2015 at 10:16 AM, Joe Subich, W4TV <[hidden email]> wrote:

>
> I don't want to save the REF LVL. I want to save its relationship to
>> the noise level.
>>
>
> I agree. Put another way, I'd like to see a reverse baseline "clamp" -
> something along the line of holding REF LVL 5 dB below the average
> noise level.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 2015-03-06 7:56 AM, Vic Rosenthal 4X6GP/K2VCO wrote:
>
>> Here is something I would like to see on the P3.
>>
>> The P3 saves the REF LVL setting per band. But of course the noise level
>> on a given band varies as conditions change, and I find myself often
>> adjusting the REF LVL.
>>
>> The optimum setting is with the REF LVL just below the noise level.
>> Setting it higher loses detail, and setting it lower fills the waterfall
>> with noise.
>>
>> What I would like would be to adjust the REF LVL to optimum with respect
>> to the noise level and then save this relationship. Then I would like to
>> be able to push a function button to automatically adjust the REF LVL to
>> re-establish the same relationship.
>>
>> This would make the readjustment, which I find myself making every few
>> minutes sometimes, much quicker and easier.
>>
>> I don't want to save the REF LVL. I want to save its relationship to the
>> noise level.
>>
> ______________________________________________________________
> 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]
>

Vic Rosenthal

Re: Useful P3 feature

In reply to this post by Joe Subich, W4TV-4

Well, what I was thinking was that you could activate the option and
adjust the REF LVL with the knob to whatever offset from the noise level
that you wanted, and then save that 'offset'.

On 6 Mar 2015 17:16, Joe Subich, W4TV wrote:

>
>> I don't want to save the REF LVL. I want to save its relationship to
>> the noise level.
>
> I agree. Put another way, I'd like to see a reverse baseline "clamp" -
> something along the line of holding REF LVL 5 dB below the average
> noise level.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 2015-03-06 7:56 AM, Vic Rosenthal 4X6GP/K2VCO wrote:
>> Here is something I would like to see on the P3.
>>
>> The P3 saves the REF LVL setting per band. But of course the noise level
>> on a given band varies as conditions change, and I find myself often
>> adjusting the REF LVL.
>>
>> The optimum setting is with the REF LVL just below the noise level.
>> Setting it higher loses detail, and setting it lower fills the waterfall
>> with noise.
>>
>> What I would like would be to adjust the REF LVL to optimum with respect
>> to the noise level and then save this relationship. Then I would like to
>> be able to push a function button to automatically adjust the REF LVL to
>> re-establish the same relationship.
>>
>> This would make the readjustment, which I find myself making every few
>> minutes sometimes, much quicker and easier.
>>
>> I don't want to save the REF LVL. I want to save its relationship to the
>> noise level.

--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Vic Rosenthal

Re: Useful P3 feature

In reply to this post by Guy Olinger K2AV

I don't want it to try to maintain the level automatically. I want to be
able to recall the saved offset with a function button push. That way it
is up to me if I want to reset it.

On 6 Mar 2015 18:16, Guy Olinger K2AV wrote:

> Wouldn't that need to be dampened a lot. What happens if there is QRN, you
> wouldn't want to be pushing the real stuff down. It would NOT be a simple
> function, and there would be wide variation on what seemed "slick".
>
> 73, Guy
>
> On Fri, Mar 6, 2015 at 10:16 AM, Joe Subich, W4TV <[hidden email]> wrote:
>
>>
>> I don't want to save the REF LVL. I want to save its relationship to
>>> the noise level.
>>>
>>
>> I agree. Put another way, I'd like to see a reverse baseline "clamp" -
>> something along the line of holding REF LVL 5 dB below the average
>> noise level.
>>
>> 73,
>>
>> ... Joe, W4TV
>>
>>
>> On 2015-03-06 7:56 AM, Vic Rosenthal 4X6GP/K2VCO wrote:
>>
>>> Here is something I would like to see on the P3.
>>>
>>> The P3 saves the REF LVL setting per band. But of course the noise level
>>> on a given band varies as conditions change, and I find myself often
>>> adjusting the REF LVL.
>>>
>>> The optimum setting is with the REF LVL just below the noise level.
>>> Setting it higher loses detail, and setting it lower fills the waterfall
>>> with noise.
>>>
>>> What I would like would be to adjust the REF LVL to optimum with respect
>>> to the noise level and then save this relationship. Then I would like to
>>> be able to push a function button to automatically adjust the REF LVL to
>>> re-establish the same relationship.
>>>
>>> This would make the readjustment, which I find myself making every few
>>> minutes sometimes, much quicker and easier.
>>>
>>> I don't want to save the REF LVL. I want to save its relationship to the
>>> noise level.

Joe Subich, W4TV-4

Re: Useful P3 feature

In reply to this post by Guy Olinger K2AV

On 2015-03-06 11:16 AM, Guy Olinger K2AV wrote:
> Wouldn't that need to be dampened a lot.

Yes, it would need to be a long-term average. However, I don't
see that as particularly more difficult than any other type of AGC
particularly given the level of computing power in the P3.

73,

... Joe, W4TV

On 2015-03-06 11:16 AM, Guy Olinger K2AV wrote:

k6dgw

Re: Useful P3 feature

In reply to this post by Vic Rosenthal

Yep, that would be cool, although I'm not sure it's doable. Would
likely work if you were switching bands often, but if you don't come
back to a band in a reasonable time, the "average" may be as invalid as
REF LVL currently is.

I generally take K9YC's advice if it pertains to audio, sometimes I'm a
little slower on non-audio things. Jim runs P3 spectrum averaging as
high as it will go. I never did ... fascination with the jumping
spectrum display?

I'm currently running at 12 for the spectrum and OFF for the WF and the
WF is what I look at and I like the results. I find I don't have to
adjust the REF LVL nearly as much. Having found out that 12 is safe for
averaging, I may push it up. But, seriously, to my surprise, it really
does tend to hold the REF LVL much more constant which is what I was
looking for in the first place.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org

On 3/6/2015 4:56 AM, Vic Rosenthal 4X6GP/K2VCO wrote:

> I don't want to save the REF LVL. I want to save its relationship to the
> noise level.

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