So - that is what the visual gain setting is supposed to correct for - in rather
coarse steps.

{^_^}

On 20191024 07:26:38, Tony_AD0VC wrote:
> I just did a quick repeat of the gain check. I fed in -70dbm directly from the
> generator (Boonton 103D). I set the gain correction in SDRC to 0db and took this
> picture. Then I stopped SDRC, started SW2 and took the second picture.
>
> Tony
>
> --------------------------------------------------------------------------------
> *From:* main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of
> Tony_AD0VC <canthony15@...>
> *Sent:* Thursday, October 24, 2019 7:09 AM
> *To:* main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
> *Subject:* Re: [SDR-Radio] S-Meter Readings
> Interesting, but not so much because the meter readings differ, but more the
> direction in which they differ. I have an S2 and I have found that SW2 software
> is accurate as far as  signal level in the spectrum window, at least for steady
> carriers from my signal generator. I never looked at the s-meter for accuracy,
> but the dbm scale is accurate.
>
> However, all versions of SDRC V3 since the beginning have shown a (approx) 10db
> greater (!) value for the same signal. In the V3 radio definitions for the S2
> you have the  option of editing the gain. I have mine set for -9db to compensate
> for this gain error. Later versions of SDRC have a visual gain setting for the
> S2 and that can be used as well.
>
> Now, you would think that your V3 readings would be correspondingly higher than
> SW-2, not lower. So, this makes me wonder if everybody sees the same gain error
> that I do.
>
> SDRC V2.3 matched with SW-2 and was gain accurate for the S2. I have mentioned
> this to Simon in the past but he was unable to see where the discrepancy was
> coming from.
>
> Tony
>
>
>
> --------------------------------------------------------------------------------
> *From:* main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of George
> Stein - NJ3H via Groups.Io <nj3h@...>
> *Sent:* Wednesday, October 23, 2019 7:34 PM
> *To:* main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
> *Subject:* [SDR-Radio] S-Meter Readings
> Greetings,
>
> I notice that using my Elad S2 software, while on a specific station, the
> S-meter reads S9+5, but when using SDR Console v3.15 listening to the same
> station the S-meter only reads S7.  The Console program always has a lower
> S-meter reading. No attenuation is set in Console.
>
> Thanks,
> George, NJ3H
> Redmond, Oregon USA
>
>
> Screenshot-2019-10-24-081042.png
>
>
> sw2_amp_cal.JPG
>