[hpsdr] High S meter reading on noise floor.

[Kjell Karlsen]

This has been discussed Ørten times on the reflector.

The S-meter settings are different on 50 MHz due to some old and different  
definitions for HF and VHF!

73, Kjell, LA2NI





På Fri, 16 Jun 2017 10:44:12 +0200, skrev Isaac Weksler  
<iweksler at bezeqint.net>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Thanks, Bert,
> I don't have Alex - I'm using the Gerd's antenna switch with an LNA.  
> Anyway, I tried to set the 6m LNA in level calibration but didn't have  
> any influence on the S-meter-SigAvg discrepancy: shows -105dBm in Sig  
> Avg and S=7. As a matter of fact, setting the ATT to -20 on 6m has no  
> effect. The discrepancy still remains.
> The meter is working OK, though, on all other bands.
>
> 73 Isaac 4Z1AO
>
> -----Original Message-----
> From: H.A.Meijer [mailto:meijer.ha at home.nl]
> Sent: Thursday, June 15, 2017 4:50 PM
> To: Isaac Weksler <iweksler at bezeqint.net>; hpsdr at lists.openhpsdr.org
> Subject: Re: [hpsdr] High S meter reading on noise floor.
>
> By that I mean that you can tell the software
>
> what is the gain of your (Alex) 6M preamp  (+/-20~25-dB)
>
> and then your S-meter is calibrated again.
>
> <General> <Calibration> <RX1 6m LNA: (0-25dB)>.
>
>
>
> Op 15-6-2017 om 9:25 schreef Isaac Weksler:
>> Exactly that.
>> But what do you mean by "calibrated out"?
>>
>>
>> -----Original Message-----
>> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of
>> H.A.Meijer
>> Sent: Wednesday, June 14, 2017 3:48 PM
>> To: hpsdr at lists.openhpsdr.org
>> Subject: Re: [hpsdr] High S meter reading on noise floor.
>>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi,
>>
>>
>> Is it not that there is an extra 6M preamp that can be calibrated out
>> in the hpsdr powersdr software?.
>>
>> 73' Bert PA2XHF
>>
>>
>> Op 14-6-2017 om 10:41 schreef Isaac Weksler:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> Hi, all.
>>>
>>> The problem of incompatible readings of Avg Signal in Db and S-units
>>> is only on 6m band. I guess it's because of the attenuator set to 0Db
>>> on 6m (-20Db on the HF bands). Looks like the Db reading of the
>>> signal is taken before the attenuator and the S-reading after it.
>>>
>>> 73 Isaac 4Z1AO
>>>
>>> -----Original Message-----
>>> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of
>>> Warren C. Pratt
>>> Sent: Tuesday, June 13, 2017 4:08 AM
>>> To: hpsdr at lists.openhpsdr.org
>>> Subject: Re: [hpsdr] High S meter reading on noise floor.
>>>
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>>
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