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21316Re: [perseus_SDR] Stange Behavior (so it seems to me) additional

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  • Vlad Titarev
    Oct 22, 2013
      no thoughts, George,
      except one: encouragement to report bugs is now at its lowest level since project began :(

      well, another (old?) problem:
      calibration failed when playing back recorded WAVs (readings are ~10Hz apart/down against "normal" i.e. read in real time
      Is it SDR's bug or mine lack of skills?... 
      [Ver. 4.0a, DLL 3.5, Widows 7/64bit Home]

      73, Vlad

      On Oct 22, 2013, at 6:06 PM, George wrote:



      Thank you for your prompt answer.  Very disappointing.  I guess the $1,000 paid for the receiver and the software was not enough money to assure that updates and fixes would be made.  Who would have thought?


      From: Paul Crankshaw <hoddlesden@...>
      To: perseus_SDR@yahoogroups.com
      Sent: Tuesday, October 22, 2013 11:34 AM
      Subject: Re: [perseus_SDR] Stange Behavior (so it seems to me) additional

      It's not operator error. The bug has been reported  but nothing has ever been done about it.


      On 22/10/2013 15:11, George wrote:
      Using the zoom button under the spectrum display still does yield satisfactory results when playing back a recorded file.  The spectrum display cannot be shifted left or right.

      Bottom line, I am not finding control of the Perseus in playback mode to be very satisfactory.  I suspect it is operator error, so please enlighten me.


      From: George <nj3h@...>
      To: "perseus_SDR@yahoogroups.com" <perseus_SDR@yahoogroups.com>
      Sent: Tuesday, October 22, 2013 10:43 AM
      Subject: [perseus_SDR] Stange Behavior (so it seems to me)

      Last evening I made numerous recordings of the MW band, centered on 950 KHz.  I had the sampling rate set on 2000kS/s.  I recorded 1.6 MHz of bandwidth.

      Here is the issue:

      I would go to 1521 KHz.  The digital frequency readout indicated 1.521000 MHz.  As I tried zooming (Span left button) on the primary spectrum screen, the last two zoom selections changed the spectrum frequency readout down to the 150 KHz (long wave) area of the recorded spectrum, even though the digital frequency readout still indicated 1.521000 MHz. I tried re-entering the frequency with the frequency input keypad that pops up, but the spectrum display stayed in the 150 to 155 KHz area and would not change to 1521.  Changing the frequency with the mouse wheel did NOT move the frequency back to 1521 KHz.  Even though the numbers changed to 1521, the spectrum screen stayed in the 150 KHz area.

      My Questions:

      So what is causing this situation to occur? 

      How does one zoom in to a specific frequency without the above situation occurring? 

      When not recording (in live mode) and with the CENTER button on, this does not occur.  However, in playback mode, the CENTER button does not work.  What is the work-around?

      In playback mode, why does changing the frequency (mouse wheel or direct entry) NOT take the listener to that frequency?

      Thanks in advance for any help and explanations.


      So what is causing this situation to occur? 

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