[Premium-Rx] Cubic CDR-3280 Digital I + Q output

[Mack Rogers]

The serial data is framed in 32 bit words consisting of 16-I and 16-Q bits. The pinout and signals are well defined in the manual. Our problem is nobody seems to know how to deal with this data format.

But I have successfully used the SoftRock Lite IF kit SDR piece to process the RF IF output in a PC. So I may not be missing much by not being able to use the J7 data output. But it would be nice to find out some day. LOL

N4VGB
Mack Rogers



 

--- On Mon, 1/17/11, David I. Emery <die at dieconsulting.com> wrote:

> From: David I. Emery <die at dieconsulting.com>
> Subject: Re: [Premium-Rx] Cubic CDR-3280 Digital I + Q output
> To: wombat5 at ntlworld.com
> Cc: Premium-Rx at mailman.qth.net
> Date: Monday, January 17, 2011, 11:43 PM
> On Sun, Jan 16, 2011 at 10:51:56AM
> -0000, wombat5 at ntlworld.com
> wrote:
> 
> > The output I am asking about is the digital serial
> output from the 15
> > pin D connector J7.  From the connector info in
> the manual there is a
> > serial data output, a clock, and a frame sync. Looks
> like it will remain
> > a mystery!
> 
>     You COULD look at these signals 
> with either a logic analyzer or
> a DSO with relatively deep storage.... or both. 
> Likely they  consists
> of 8 or 16 or 24 bit word containing one I or Q sample sent
> bit
> serially - or perhaps two words (I and Q) after each frame
> sync pulse.
> 
>     Using this for anything would require
> some hardware to take
> the serial bits and clock them into some kind of register
> for access
> by software on a processor (presumably a PC)...
> 
> 
> -- 
>   Dave Emery N1PRE/AE, die at dieconsulting.com 
> DIE Consulting, Weston, Mass 02493
> "An empty zombie mind with a forlorn barely readable
> weatherbeaten
> 'For Rent' sign still vainly flapping outside on the weed
> encrusted pole - in 
> celebration of what could have been, but wasn't and is not
> to be now either."
> 
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