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Re: [Discuss-gnuradio] AR5000 and downconversion
From: |
Krzysztof Kamieniecki |
Subject: |
Re: [Discuss-gnuradio] AR5000 and downconversion |
Date: |
Thu, 15 May 2003 00:14:43 -0400 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312 |
Alan Gray wrote:
Sorry, I probably should have been more specific about my aims
I'm looking to receive and demodulate an Australian HDTV signal. We use
a COFDM (Coded Orthogonal Frequency Division Multiplexing) modulation
scheme instead of the ATSC scheme used in the US but the bandwidth
requirements are approximately the same, around 6-7MHz. This, I believe,
rules out the possibilities of trying to use undersampling techniques to
sample the signals, as I don't think I can fit the entire signal into a
Nyquist region.
I'm looking at trying to downconvert the 10.7MHz IF to a center
somewhere in the range of 5-6MHz, which I think should be possible
though I'm currently unsure if there is an IC on the market which will
do the job while still maintaining a decent IF bandwidth. I'm still
looking into the possibilities, but again, if anyone has an opinion it's
most welcome
Alan
<snip>
I have been wondering about this sort of stuff myself. (I'm a Software Monkey)
Is there an RF EE in the house?
Is it as simple as getting an Minicircuits coaxial mixer, anti-aliasing filter, and some sort of
Frequency source could you just connect them together with some random (impedence matched) Coax
cables and make a simple tuner.
With a fixed 5MHz source would this be Alan's downconverter?
There must be some catches somewhere, can someone give us some details?
--
Krzysztof Kamieniecki
mailto:address@hidden
- [Discuss-gnuradio] AR5000 and downconversion, Alan Gray, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, brian whitaker, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Alan Gray, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, John R. Ackermann N8UR, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Dave Emery, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Krzysztof Kamieniecki, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Joseph DiVerdi, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Joshua Lackey, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Krzysztof Kamieniecki, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Joshua Lackey, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion,
Krzysztof Kamieniecki <=
- Re: [Discuss-gnuradio] AR5000 and downconversion, John Gilmore, 2003/05/15
Re: [Discuss-gnuradio] AR5000 and downconversion, Henrique Miranda, 2003/05/14
Re: [Discuss-gnuradio] AR5000 and downconversion, Robert Kelley, 2003/05/14