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RE: [Discuss-gnuradio] Progress on Sheeva -- actually got a half-way fun

From: Bruce Stansby
Subject: RE: [Discuss-gnuradio] Progress on Sheeva -- actually got a half-way functional flow-graph working
Date: Fri, 9 Apr 2010 23:19:50 +0000

I did the same sort of thing comparing the 2 channel 1Gs/s roach boards and the 
4 channel 1.5Gs/s PX15500's when every one was ranting about the roach boards 
and how cheap they where. It worked out a persample dollar of a 3rd less or so 
for the more expensive one.

What it really comes down to is, what do you really need, and will you ever 
have any need of the capabilities. And more importantly do you have the could 
hard cash to get the more "expensive one"

From: address@hidden address@hidden on behalf of Marcus D. Leech address@hidden
Sent: Friday, 9 April 2010 10:39 PM
To: Philip Balister; GNURadio Discussion List
Subject: Re: [Discuss-gnuradio] Progress on Sheeva -- actually got a half-way   
functional flow-graph working

> On 04/08/2010 10:30 PM, Marcus D. Leech wrote:
>> http://www.sbrac.org/files/audioSIDnoGUI.py
>> http://www.sbrac.org/files/audioSIDnoGUI.grc
>> It can only handle two channels, and it takes 78% of the CPU while doing
>> it, but it does work!
> How about calculating a $ per sample number?
> Philip
Hmmm, let's see.

The Sheeva Plug was $99.00
The USB Audio subsystem I had to buy for it was $79.00

So, $178.00  divided by 96000 samples/sec

That's 0.2cents/sample/sec

Let's see how that scales using a USRP1 and a "mildly pimped out" PC

USRP1 is $700
PC is probably another $700

So, $1400.00 divided by 8megasamples/sec

That's roughly 0.02cents/sample/sec

The USRP1 + PC is roughly an order-of-magnitude better value, when
looked at in that way.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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