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Re: [Discuss-gnuradio] Low-cost hardware options
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] Low-cost hardware options |
Date: |
Sat, 15 Jan 2011 08:53:16 -0500 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.15) Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10 |
On 01/15/2011 05:01 AM, Moeller wrote:
>
> But I would suggest an option to switch to a second input,
> directly into the ADC, to cover the range DC to 10 MHz, or to attach
> an external RF, IF (e.g. from an amateur radio).
> Or a second board without mixer, just replacing it on the FMC connector,
> similar to the USRP daughterboard system.
>
>
Yes, I considered that, too, and it would be cheap to do. I'll update the
block diagram.
> I looked at the CY7C68013 EZ-USB FX2 data sheet.
> Is it true that we wouldn't need any FPGA glue logic to control
> the receiver, for the frequency synthesizer, flow control etc. ?
> There are lots of IO pins and busses on the FX2.
> The embedded 8051 µC could be used to control the receiver.
>
>
We'd likely need a *little* bit of "glue logic" to interface to a "smart"
ADC like the AD6652, something that a little CPLD would work
just fine for.
>
> I think for USB you don't have to deal with the protocol.
> USB chips will handle this, similar to the EZ-USB.
>
>
There aren't a lot of USB-3.0 chips out at the moment--most implementations
that I can see are FPGA-based, hence the comment. But something like
the EZ-FX2, but support USB-3.0 instead may emerge at some point.
Don't know--anyone else have a good "view" into where USB-3.0 is
going?
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
[Discuss-gnuradio] Re: Low-cost hardware options, Patrick Strasser, 2011/01/15