Re: Perseus tuning problem.


Simon Brown
 

Tony,

 

Could be done but not really essential I think.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Tony_AD0VC
Sent: 25 April 2019 16:06
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Perseus tuning problem.

 

I was thinking along the line of 'adaptive' code. As you gain information about what the users radio is actually producing for a sample rate, save the information and use it the next time you start. Maybe the sample rates are constants (compile time) so this doesn't work...(?)

 

Tony

 


From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Simon Brown <simon@...>
Sent: Thursday, April 25, 2019 12:13 AM
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Perseus tuning problem.

 

Tony,

 

Yes – but it takes time to get accurate values. Dave’s values agree with mine so I’ll update Perseus today or tomorrow.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Tony_AD0VC
Sent: 25 April 2019 01:57
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Perseus tuning problem.

 

If you can look at the log file numbers over time and figure out what the sample rate really is, it seems like the code could do it too...

 

Tony

 


From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of D R via Groups.Io <robsond90@...>
Sent: Wednesday, April 24, 2019 5:58 PM
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Perseus tuning problem.

 

The 125kHz data is now in the Excel file.  It turned out to be the most accurate one of all - just 0.28Hz error!

 

Regards,

Dave

 

 

On Wednesday, 24 April 2019, 19:33:46 GMT+1, D R via Groups.Io <robsond90@...> wrote:

 

 

Simon,

 

My data file attached.

 

Out of curiosity I also recorded the sample rates at 2M, 500k and 250k, which revealed that 250kHz is easily the most accurate, and 95k by far the least.  For the sake of completeness, I'll also run 125kHz bandwidth as well, but as this will take another four and a half hours I'll send the results later tonight.

 

The results are also tabulated in the attached Excel file for easy viewing.

 

Regards,

Dave

 

 

On Wednesday, 24 April 2019, 12:07:19 GMT+1, Simon Brown <simon@...> wrote:

 

 

Paul,

 

Yes please, should confirm Dave’s findings.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Paul NN4F
Sent: 24 April 2019 00:21
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Perseus tuning problem.

 

Simon,

Do you need from multiple radios, I can run my Perseus also and send?

 

Paul Jones - NN4F / ELAD Technical Support

Work Email: Support@...

Personal Email: paul@...


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