[Elecraft] RF-Gain & S-Meter (again)

[Adi Andrei]

I agree with Guy and Ken.

Adi
2E0TTX

On 29/05/2011 23:05, Ken Roberson wrote:
> Hello all,
>
> I agree with Guy.
>
> This could be turned on when CONFIG:SMTR MD is
> set to ABS.
>
> Ken K5DNL
> ------------------------------------------------------------
>
> --- On Sun, 5/29/11, Guy Olinger K2AV<olinger at bellsouth.net>  wrote:
>
>> From: Guy Olinger K2AV<olinger at bellsouth.net>
>> Subject: Re: [Elecraft] RF-Gain&  S-Meter (again)
>> To: "Mike Morrow"<kk5f at arrl.net>
>> Cc: elecraft at mailman.qth.net
>> Date: Sunday, May 29, 2011, 2:33 PM
>> Exactly, which is what most people
>> expect, without knowing that they
>> expect it, since 99% of ham receivers have done that since
>> AGC first
>> showed up.
>>
>> This behavior is CODED INTO the K3 firmware algorithm for
>> the S-meter
>> presentation.  It is not mandated by the way hardware
>> is wired.  It is
>> a choice made by the coder of K3 firmware, not the designer
>> of circuit
>> board traces.  The firmware COULD be coded to always
>> show the signal
>> level at the antenna input regardless of RF gain setting,
>> which is
>> what I would prefer.  This could be turned on when
>> CONFIG:SMTR MD is
>> set to ABS.
>>
>> 73, Guy.
>>
>> On Sat, May 28, 2011 at 11:04 PM, Mike Morrow<kk5f at earthlink.net>
>> wrote:
>>> The more common method for the past 65 years or so has
>> been to use the AGC
>>> circuit to reduce stage gain for both automatic AND
>> manual gain control:
>>> (1A) AGC, which as it gets larger for stronger signals
>> increases bias
>>>      voltage to the RF and IF stages.  This is the
>> input to the S-meter.
>>>             PLUS
>>> (1B) Manual RF gain, which manually increases the bias
>> voltage in the
>>>      AGC circuit to the RF and IF stages, and thus
>> directly affects
>>>      the S-meter just as any AGC bias voltage
>> increase would.
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