[hpsdr] Call for Comments and Discussion - OzyII

[Keith Hornbaker]

Hello,

Will the initial setup require a separate nic to the host along with a xover
cable if you want to use the pc for other tcp/ip tasks without switching
cables around? It appears initially you may not be able to communicate
through a hub or switch which is understandable.

Are the higher data rates mainly to support the capability of going to
higher rf frequencies? How will the LVDS transceivers connect to Mercury for
higher frequencies I assume they would need to be very short.

Will there be better protection provided on the external I/O lines than the
current OZY? I had a USB failure on my current OZY I after replacing the
flat pack I added 4 diodes similar to the layout of the USB6B1 and so far it
has been working good. 



-----Original Message-----
From: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Phil Harman
Sent: Saturday, July 18, 2009 3:50 AM
To: hpsdr at openhpsdr.org
Subject: [hpsdr] Call for Comments and Discussion - OzyII

***** High Performance Software Defined Radio Discussion List *****

All,

I've posted a preliminary block diagram of what  OzyII could look like on 
the Wiki -

< http://openhpsdr.org/wiki/index.php?title=OZYII >

It's basically a large, leaded, FPGA connected to a 10/100/1000 Ethernet PHY

chip.  The LVDS transceivers will provide high speed data access to Mercury 
and other future projects to free us from any Atlas bus limitations.

There are a number of options for the Gigabit PHY, these are shown on the 
Wiki. Initially I'm trying to avoid those manufacturers that require an NDA 
before they will release data sheets etc on their chips.  If anyone has 
experience with such PHYs  I would be grateful to hear from them.

By using a large FPGA if offers the potential to add a soft core 
microprocessor in the future so that the board can run a full TCP/IP stack, 
UDP etc. e.g. uIP (see  http://www.sics.se/~adam/uip/index.php/Main_Page ).
Initially we will use the Gigabit PHY as just a fast connection to the PC 
and use raw frames to communicate.

Lyle, KK7P, has kindly volunteered to lay out the PCB and we have funding 
from TAPR to undertake the prototype development.  Thanks to both for their 
continued support.

Bill, KDTFD, has offered to help with the PC Ethernet code and would 
appreciate assistance from anyone who has experience with working with 
Ethernet at a low level on the PC under Windows.

Feedback is requested in relation to features and facilities that folks may 
require.

73's Phil...VK6APH





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