Re: [hpsdr] Ozy – Schematic OZY_REVXA3.sch (comments)

[Alex]

Phil,
You mean th Asix AX88180? (http://www.asix.com.tw/products.php?op=pItemdetail&PItemID=88;65;102&PLine=65)
 It needs two clocking sources, one is from the host system clock (40-100MHz), the other is a 125MHz clock for the RGMII interface.

With all the VHF hash around, we might want to think about shielding any sensitive circuits.   

Alex, N3NP

----- Original Message ----
From: Philip Covington <p.covington at gmail.com>
To: Alex <harvilchuck at yahoo.com>
Cc: hpsdr at hpsdr.org
Sent: Wednesday, May 17, 2006 1:58:03 PM
Subject: Re: [hpsdr] Ozy – Schematic OZY_REVXA3.sch (comments)

On 5/17/06, Alex <harvilchuck at yahoo.com> wrote:
> Phil,
> If there still is a worry about bandwith limitations on the USB (say like having other devices - keyboards, mice, etc - on the same USB host controller) how about sending the data via cat5 ethernet or fiber. Leave the control on USB. A software widget is then needed on the host computer to expose an interface for PowerSDR.
>
> Here's a neat little device that some compatriots from Europe found:
>
> http://www.edtp.com/nicholas_page.htm
>
> Might be useful on CASMIR and HORTON for tower mounting microwave transceiver equipment.
>
> Alex, N3NP

Hi Alex,

I would not consider anything less than gigabit ethernet if I was
going through the trouble of adding an ethernet interface.  ASIX has a
very interesting chip like the one in the NICholas but it will do
giga... now if I could only find a source for that part...

I am keeping my eye on PCIe solutions (x1 2.5 GbPS).  Phillips and TI
make PHY chips that will work with the Cyclone II.  I envision having
a PCIe card in the PC.  From the PC to the HPSDR would be fiber using
GBICs.

73 de Phil N8VB




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