Hello to all
my name is Yoann F4DRU in france
I am a sensibility problem on my DSP10
I forward to all the mail i have send to BOB
If any one can help me ...
73 Yoann
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> thank you very much for your answer
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> I have began the process to sign up the the reflector
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> to your questions i can say:
> in USB 4800, A/D level is low and the D/A is high (eg -0.37dB) AF gain is=
57 for earing something
> when i decrease RF gain, Signal level is S5 and noise passes from -157dBm=
to -121dBm but the spectral display do not change.
> I have made the coil peak with a signal generator and i find it very simp=
ly but the sensibility is very poor
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> No test in TX
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> thanks a lot
> Yoann=20
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> > Message du 03/01/04 =E0 06h50
> > De : Bob Larkin <boblark@proaxis.com>
> > A : yoann.sophys@voila.fr> > Copie =E0 :=20
> > Objet : Re: dsp10 sensibility
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> > Dear Yoann,
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> > It is nice to hear of your progress and work with the DSP-10 project.
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> > Before attempting to figure out what might be wrong with your receiver=
,=20
> > might I suggest that we move the discussion to the DSP-10 email reflect=
or?=20
> > If you are not familiar with this, it is at qth.net, the signup page i=
s at=20
> > http://www.qth.net and messages go to dsp-10@mailman.qth.net This wil=
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> > get help from many more than just myself, and will also help anyone els=
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> > with a similar problem.
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> > Also, I hope that you have the diagnostic pages linked from=20
> > http://www.proaxis.com/~boblark/dsp10.htm> > These don't answer all questions, but can be helpful. Also, the DC=20
> > measurements, such as you have for D1 and D2 are very helpful. Those se=
em=20
> > correct. The other DC measurements ight give a clue. Also, do all tuni=
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> > coils peak? Does the transmitter put out power? Are you seeing noise on=
the=20
> > spectral display? When the RF gain is lowered, does that level change?
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> > Please feel free to answer this, and to leave the messages below attach=
ed,=20
> > on the DSP-10 email reflector.
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> > Best wishes, and I look forward to hearing more!
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> > 73, Bob W7PUA
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> > At 06:15 AM 12/30/2003, you wrote:
> > >Dear BOB
> > >My name is Yoann I am F4DRU from France.
> > >First of all, thank you for your DSP project . It is a great digital r=
adio=20
> > >project !!
> > >
> > >I have a sensibility problem on my DSP10
> > >It comes from the TAPR KIT
> > >All seems correct but the sensibility is poor (500 micro volts for S1 =
S2)
> > >i have peak the coils fo maximum signal but it is no enough...
> > >Have you ever seen this problem
> > >
> > >note : D1 and D2 voltage are 0.81 and decrease when the AR gain is low=
ered
> > >
> > >Can you help me
> > >
> > >Thank you
> > >
> > >best wishes
> > >
> > >Yoann
> > >------------------------------------------
> > >
> > >Faites un voeu et puis Voila ! www.voila.fr
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> ------------------------------------------
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> Faites un voeu et puis Voila ! www.voila.fr=20
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Faites un voeu et puis Voila ! www.voila.fr=20