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15017Re: [tracker2] OTUSB RX Level

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  • Scott Miller
    Dec 12, 2012
      *Ideally* every packet would hit exactly 100% at its highest peaks. In
      practice there's a lot of variability in deviation, so I usually aim for
      about 75%.

      Scott

      On 12/12/2012 3:09 PM, Matthew Cook wrote:
      > Yep thanks for that, found the right button and unit is now upgraded
      > with the beta software. I also like the RX level adjustment in the
      > Tuning/Diagnostics menu too, very nice.
      >
      > Just a question regarding the RX level adjustment, where should we be
      > aiming to have the blue bar, towards the higher end or somewhere in the
      > middle? From the discriminator with a 1200Hz tone and 3kHz deviation
      > the blue bar sits about half way (50%) with the x4 gain setting doesn't
      > move for the other tone 2200Hz. If I take x16 gain the blue bar goes
      > to 100% and stays there.
      >
      > Looking at the packet demodulation it appears to decode better with x16
      > (100%) than with x4 (50%), however this is just my subjectinve
      > comparison with a T2-301 plugged into the same antenna.
      >
      > Your thoughts?
      >
      > 73's
      >
      > Matthew
      > VK5ZM
      >
      > On 13 December 2012 02:40, Scott Miller <scott@...
      > <mailto:scott@...>> wrote:
      >
      > Click the 'web' button in otwincfg.
      >
      > Scott
      >
      > On 12/11/2012 9:55 PM, Matthew Cook wrote:
      > > Ah now I don't feel so silly.. will go and check that menu option
      > out...
      > >
      > > Now just to prove that I don't pay attention, where can I
      > download the
      > > latest version of the code for the OTUSB?
      > >
      > > 73's
      > >
      > > Matthew
      > > VK5ZM
      > >
      > > On 12 December 2012 13:21, Scott Miller <scott@...
      > <mailto:scott@...>
      > > <mailto:scott@... <mailto:scott@...>>> wrote:
      > >
      > > It's in the tuning/diagnostic menu. The latest beta version
      > has an AGC
      > > function that seems to be working well.
      > >
      > > Scott
      > >
      > > On 12/11/2012 5:20 PM, Matthew Cook wrote:
      > > > Ok that's interesting. Where do I find the gain setting?
      > Me thinks
      > > > I've missed something in the manual?
      > > >
      > > > I've got about +/-250mV from my discriminator but the
      > OTUSB was not
      > > > decoding packets. Once I'd put in an opamp buffer and
      > drove +/-2Vp-p
      > > > into the pin it sprang to life.
      > > >
      > > > Matthew
      > > > VK5ZM
      > > >
      > > > On 12 December 2012 03:55, Scott Miller
      > <scott@... <mailto:scott@...>
      > > <mailto:scott@... <mailto:scott@...>>
      > > > <mailto:scott@... <mailto:scott@...>
      > <mailto:scott@... <mailto:scott@...>>>> wrote:
      > > >
      > > > On the highest gain setting, about 75 mV p-p seems to
      > be OK.
      > > >
      > > > Scott
      > > >
      > > > On 12/8/2012 5:11 AM, Matthew Cook wrote:
      > > > > I'm hoping this is a quick question.
      > > > >
      > > > >
      > > > > How many volts peak to peak do you need to drive
      > into the
      > > Audio Input
      > > > > pin of the OTUSB for it to reliably decode.?
      > > > >
      > > > > Any ideas?
      > > > >
      > > > > 73's
      > > > >
      > > > > --
      > > > > Matthew
      > > > > VK5ZM
      > > > >
      > > > >
      > > >
      > > >
      > > >
      > > > ------------------------------------
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      > > > Yahoo! Groups Links
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      > > <mailto:tracker2-fullfeatured@yahoogroups.com
      > <mailto:tracker2-fullfeatured@yahoogroups.com>>>
      > > >
      > > >
      > > >
      > > >
      > >
      > >
      > > ------------------------------------
      > >
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      > >
      > >
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      > <mailto:tracker2-fullfeatured@yahoogroups.com>>
      > >
      > >
      > >
      > >
      >
      >
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