[hpsdr] Ozy - Schematic OZY_REVXA3.sch (comments)

[Alex]

More of a note of an interesting device, not necessarily useful for OZY. I agree that fiber is the direction to go.

----- Original Message ----
From: Christopher T. Day <CTDay at lbl.gov>
To: Alex <harvilchuck at yahoo.com>; Philip Covington <p.covington at gmail.com>; hpsdr at hpsdr.org
Sent: Wednesday, May 17, 2006 1:13:49 PM
Subject: RE: [hpsdr] Ozy - Schematic OZY_REVXA3.sch (comments)

Alex,

Unless I'm missing something, the 480Mb/sec total bandwidth of USB 2 is
nearly 5 times that of 100Mb/sec Ethernet. Ethernet is always collision
sensitive, but Isochronous ("Oh, no, not again!" everybody groans.) USB
Endpoints are not. I don't know the length limits of USB cables off
hand, but they carry power by design. Why is Ethernet better?


    Chris - AE6VK


-----Original Message-----
From: Alex [mailto:harvilchuck at yahoo.com] 
Sent: Wednesday, May 17, 2006 10:00 AM
To: Philip Covington; hpsdr at hpsdr.org
Subject: Re: [hpsdr] Ozy - Schematic OZY_REVXA3.sch (comments)

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

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

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