[hpsdr] Pan adapter passband accuracy

[Willi Reppel]

Hi Scott,
It is possible that Flex Radio Systems had different versions of programs in their library for Europe. I noticed after downloading of a new version after 2005
that certain improvements were made and I could not choose any longer said 10 kHz bandwidth and the keying speed was also limited to 30-45 wpm.
It was great fun to send short music tu-nes in ssb to show the outstanding per-formance of the SDR 1000, having in mind that this was illegal in Sweden and most other countries in Europe. A FM-type of high reproduction quality was confirmed by listeners who were instruc-ted to widen their rx bandwidth.
I´ll try to put my vintage SDR 1000 in operation again and hope to find the old program on one of my defunct compu-ters.
vy 73 es cuagn de
SM6OMH Willi
  ----- Original Message ----- 
  From: Scott Traurig 
  To: Willi Reppel 
  Cc: Dean ; OpenHPSDR 
  Sent: Monday, April 13, 2020 8:37 PM
  Subject: Re: [hpsdr] Pan adapter passband accuracy


  I had a Flex-3000. The PowerSDR software client application provided by Flex that ran that and the other legacy series Flex radios allowed a 10KHz transmit passband (20KHz on AM).


  The SmartSDR software client provided by Flex for the current day Flex radios also allows 10KHz (20KHz on AM).


  The software clients for openHPSDR architecture hardware, PowerSDR mRX PS and Thetis, both allow 10KHz (20KHz on AM).


  As far as I know there were no versions of the above applications that limited the TX passband to 3KHz.


  There are no regulations in the US that set limits on the bandwidth of amateur radio phone signals except on 60M.


  73,


  Scott/w-u-2-o




  On Mon, Apr 13, 2020 at 4:13 AM Willi Reppel <wi.re at telia.com> wrote:


    Hi Dean,
    Sending from Sweden to "down under" my best wishes for your Happy Ester 
    festivities.
    The problem you report is well know to older users of HPSDR. In the 
    beginning of Gerald Youngblood´s Software Radio programs, you  could choose 
    all audio frequencies in SSB from zero to 10 kHz. I made short test QSOs 
    with ham operators of my region here and they reported a FM-radio-like audio 
    quality when  trans-mitting a short tune of musik with an audio bandwidth of 
    10 kHz. However, the receiver of my illlegal transmission was asked to tune 
    his bandwidth in recption to a maxi-mum.
    Later on the US-authorities interfered and reminded Flex Radio Inc. to 
    restrict the choice of audio bandwidth to
    max 3000 Hz. They complied and in later versions of HPSDR software radio 
    programs, the bandwidth became limited to the legal regulations in the US. 
    Yet, may be  that some smart programmers change this part of HPSDR and 
    allowing themselves a greater bandwidth again.
    This is my guess work, but::What can be done will be done will be done by 
    wizard programmers.
    vy 73 gl es cuagn de
    SM6OMH  Willi
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