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<br>
Al<br>
<br>
We've only had one meeting and it was just to determine if there was
interest. YES<br>
Other than that, we talked about some objectives like performance
and cost. Other than ruling out a few things, nothing has been
decided:<br>
<br>
No to using the beagle audio IO for the sampling. They may be used
for speaker and mic.<br>
No to 0 IF schemes<br>
<br>
There is a practical limitation on the serial IO between beagle and
any board we may build. I recall that might be in the 30MHz range
and taking 2 15 bit samples (I/Q) 30MHz/30bits = 1M sample limit.
Whether this is a 1 MHz A/D or something faster with an FPGA to
filter/DDC to 1MHz is a very big TBD. This is all speculation and
tire kicking, there is no analysis to support these numbers.<br>
<br>
Fred's discussion today is attempting to determine if there is a
significant cost advantage or performance advantage to one method or
the other. <br>
<br>
Now you're up to speed <br>
<br>
Barry<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 4/14/2011 5:22 PM, <a class="moz-txt-link-abbreviated" href="mailto:aetupker@rockwellcollins.com">aetupker@rockwellcollins.com</a> wrote:
<blockquote
cite="mid:OF5EA5114F.FAD4D147-ON86257872.0079F3BB-86257872.007AEDEF@rockwellcollins.com"
type="cite">
<br>
<font size="3" face="sans-serif">Again, since I havent been to any
meetings
I hope this is not stuff that has already been discussed.</font>
<br>
<br>
<font size="3" face="sans-serif">This Tayloe mixer looks like it
would
fix some of the problems we had with the 95-S zero IF "direct
conversion"
receiver.</font>
<br>
<font size="3" face="sans-serif">Link to a very good article.</font>
<br>
<br>
<a moz-do-not-send="true"
href="http://www.norcalqrp.org/files/Tayloe_mixer_x3a.pdf"><font
size="3" color="blue"><u>http://www.norcalqrp.org/files/Tayloe_mixer_x3a.pdf</u></font></a>
<br>
<font size="3"> </font>
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