Hew,
Do you recall what the hardware mods were? I'm wondering if I can
clean up card with caps here and there. I looked at your sine wave
data. I low pass filtered it and got rid of most of that garbage. The
tone is at 1890 Hz as far as I can tell. How did you generate that tone
and what was the center frequency? Where did you inject the tone?
-Jim
Hew How Chee wrote:
Hi Jim,
The card I use last time is PV-TV304P+ (REV .2B) with FMRC (FM and
Remote Control) . The chipset used is CX23881. The card from
newegg.com is using CX23883. Can't tell it is compatible or not. The
data I got is 8 bit unsigned. Didn't try out 10 bit since I was quite
dissapointed by the noise in the 8 bit digitized signal. Nevertheless,
it is still possbile to digitize the 10.7 MHz FM IF with hardware mods.
Note that the source code at
http://www.geocities.com/how_chee/cx23881.htm can't compile and run in
Linux kernel 2.6 and is not hooked up to GNURadio. It was developed
using Knoppix Live CD 3.4 running kernel 2.4.x.
Best regards,
Hew
*/Jim Perkins <[EMAIL PROTECTED]>/* wrote:
Hew,
Aren't you the guy how figured out how to get the ADC data from
the CX23881 card into the PC? I found your website
http://www.geocities.com/how_chee/cx23881.htm and looked at the
data. I think I'm going to get one of these cards to play with.
What model number do you have? I can find PROLINK PV-TV304P+FMRC
for $30 at newegg.com. The Prolink website says it's 8 or 10 bits
so I'm wondering if that is the right card.
-Jim
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Try it now.
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