Loading ...
Sorry, an error occurred while loading the content.

2770AW: [V4Protocol] Announcement -- TS-590S TechNote: SSB Audio Handling v1.0

Expand Messages
  • siegfried jackstien
    Apr 24, 2012
      Multipsk also has such a fuction

      My onboard shows 47999 or 48000 when doin several tests ... so my soundchip
      seems to be

      > -----Ursprüngliche Nachricht-----
      > Von: V4Protocol@yahoogroups.com [mailto:V4Protocol@yahoogroups.com] Im
      > Auftrag von Rick Muething
      > Gesendet: Montag, 23. April 2012 20:35
      > An: V4Protocol@yahoogroups.com
      > Betreff: Re: [V4Protocol] Announcement -- TS-590S TechNote: SSB Audio
      > Handling v1.0
      >
      >
      >
      > Thanks Ian,
      >
      > If I recall there is a fairly simple utility in Mix W that does a fair job
      > of estimating Sound card sample rate. It uses the internal clock of the PC
      > To calculate sound card sample rate over many thousand samples to get some
      > form of a long term average. I guess the typical reference clock (time of
      > day clock) in the PC is more accurate than typical sound card sample rate
      > clocks and you get fairly repeatable results with this utility. Its
      > probably not as good as using WWV or precision references but its easy to
      > use and set up. I’ll try and run some tests on the 7200 later in the
      > week.
      >
      > Rick KN6KB
      >
      > From: Ian Wade G3NRW <mailto:g3nrw-radio@...>
      > Sent: Monday, April 23, 2012 3:54 PM
      > To: V4Protocol@yahoogroups.com
      > Subject: Re: [V4Protocol] Announcement -- TS-590S TechNote: SSB Audio
      > Handling v1.0
      >
      >
      >
      > ___Original Message_________________________________________
      > From: Rick Muething <mailto:rmuething%40cfl.rr.com>
      > Date: Mon, 23 Apr 2012 Time: 07:30:28
      >
      > >In general what do you think of the TS-590 and have you compared it to
      > >the Icom 7200?
      >
      > Rick
      >
      > My thoughts on the TS-590S tally very closely with most of the reviews
      > on Eham -- in other words, I am extremely happy with it all round (but
      > especially the receiver, which is outstanding for a radio in this price
      > bracket). I have no experience of the IC-7200, so I can't offer any
      > comparison.
      >
      > >
      > >One thing I would be interested in too is if you have made any
      > >measurements (they aren’t easy to measure) of the sample rate accuracy
      > >of the built in sound card.
      >
      > [Snip]
      >
      > No, I haven't made any detailed sample rate accuracy measurements with
      > the TS-590S or PC sound cards. That is something I want to look at in
      > more detail. I have not played much with low-level signals or multiple
      > carrier signals on this radio, where sampling accuracy can obviously
      > make quite a difference.
      >
      > >
      > >
      > >I suspect Kenwood and Icom are using a
      > >generic USB CODEC sound chip
      >
      > The TS-590S uses the PCM2903B stereo audio CODEC:
      >
      > http://www.ti.com/lit/ds/symlink/pcm2903b.pdf
      >
      > >
      > >
      > >I have been keeping up with (and making occasional contributions to) the
      > >work on a open source Voice codec (good voice quality at about 1200
      > >bits/sec and 1500 Hz bandwidth). This is being done by David Rowe in
      > >Australia and it would be a perfect fit for a radio like the TS-590.
      > David has
      > >achieved better performance than the proprietary CODEC used in the
      > >D-Star radios and I think will soon have the matching HF Modem ready for
      > >initial beta testing.
      >
      > The whole world is very much looking forward to this!
      >
      > Finally, all your comments are most interesting -- sorry I can't add
      > much to them.
      >
      > --
      > 73
      > Ian, G3NRW
      >
      >
      >
      >
    • Show all 8 messages in this topic