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RE: [Discuss-gnuradio] Quadrature demodulator update
From: |
Philip Mackenzie |
Subject: |
RE: [Discuss-gnuradio] Quadrature demodulator update |
Date: |
Tue, 11 Feb 2003 21:26:46 -0000 |
Dave,
> Not so clear to me. If I understand you correctly the IF sampling
>clock is getting into the front end of the receiver ?
Yes thats exactly whats happening.
> A spectrum analyzer might and might not help locate the
>problem, but look up material on shielding, grounding, interference
>control and EMC testing and remediation (VDE and FCC A and B).
I did try a spectrum analyser a while ago. I can't remember the exact
numbers but the peaks did show up right across the band (up past 2GHz) and
were very strong, so strong in fact that I figured it was more than
shielding, etc. Maybe I was wrong but I assumed that since the mini-circuits
amplifier comes in a shielded metal enclosure that I wouldn't need to mount
it in a another shielded box. All the interconnects are BNC 50ohm coax.
Anyway, I'm sure a combination of both impedance matching and shielding, etc
will fix it. Since no-one has reported any similar problems using the
microtune front-end I can only assume that 4020 card is not to blame.
Thanks for all the replies,
Philip.
- RE: [Discuss-gnuradio] Quadrature demodulator update, (continued)
- RE: [Discuss-gnuradio] Quadrature demodulator update, Philip Mackenzie, 2003/02/11
- Re: [Discuss-gnuradio] Quadrature demodulator update, Eric Blossom, 2003/02/11
- RE: [Discuss-gnuradio] Quadrature demodulator update, Philip Mackenzie, 2003/02/11
- Re: [Discuss-gnuradio] Quadrature demodulator update, John Turner, 2003/02/11
- RE: [Discuss-gnuradio] Quadrature demodulator update, Philip Mackenzie, 2003/02/11
- Re: [Discuss-gnuradio] Quadrature demodulator update, John Turner, 2003/02/11
- Re: [Discuss-gnuradio] Quadrature demodulator update, Dave Emery, 2003/02/12
- Re: [Discuss-gnuradio] Quadrature demodulator update, John Turner, 2003/02/12
- [Discuss-gnuradio] FYI Smith charts, Eric Blossom, 2003/02/11
- Re: [Discuss-gnuradio] Quadrature demodulator update, Dave Emery, 2003/02/11
- RE: [Discuss-gnuradio] Quadrature demodulator update,
Philip Mackenzie <=
Re: [Discuss-gnuradio] Quadrature demodulator update, Ian Wraith, 2003/02/11