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<DIV><FONT face=Arial size=2>Hi Chris,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I think that most of your questions are answered on
the Wiki at </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>< <A
href="http://hpsdr.org/wiki/index.php?title=HpsdrWiki:Community_Portal">http://hpsdr.org/wiki/index.php?title=HpsdrWiki:Community_Portal</A> ></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>but I'll take a shot at them anyway.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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<DIV>1: I've seen the ATLAS pinouts and the connections JANUS and OZY board to
the backplane. What is the protocol being used for communication on the
backplane? Where do I find this information?</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>No real protocol just the low level signals that
need to be passed from the ADCs and DACs. These basically are I2S format
except for the I/Q signals which are straight 2's complement
PWM. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>There is documentation for the Ozy board that
covers the protocol used over USB 2 to the PC - the general concept is current
but I need to update the exact details. I think there is a link on the
web page if not let me know and I will add one.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>We have taken great care NOT to set the Altas bus
in stone too early in the project since we have no idea of where this project
may lead in the future. For that reason, apart for ground and the power
supplies most other signals can be shifted around on the bus using an FPGA or
CPLD interface. We will try and stick to that pholosophy for as long as
possilble - a few signals seem to be setting down e.g the I2C
bus.</FONT></DIV>
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<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV>
<DIV>2: The MERCURY board shows a 0-30 Mhz input and output, but is only
refered to as a Direct Sampling Receiver board. With the block diagram showing
the 4 boards I was assuming that Mercury was an IF board for both TX and RX.
Is it just a receiver?</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Not just a receiver but a spectrum analyser plus
a digital sampling oscilloscope as well! Mercury is still in the design
stages and we are trying many different ideas before we make the first PCB. I
think the Wiki should cover most of your questions but please post again if
not since I'm sure others will have the same questions.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV>
<DIV>3: Is there a consideration of having a IF switch board for the use of
transverters? </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>I'm actually considering an untimate Universal
Controller Board and the moment. It would plug into the Altas bus and provide
numerious inputs and outputs (relays, open collector/drain, optos etc). Most
likely based on a low cost CPLD and using I2C as an interface. Tell me more of
what your requirements are and what you had in mind.</FONT></DIV>
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<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Hope that helps </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>73's Phil...VK6APH
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