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

[GandalfG8 at aol.com]

In a message dated 16/01/2011 10:52:09 GMT Standard Time,  
wombat5 at ntlworld.com writes:

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!



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Ah, that's different from any I and Q outputs
 
 
The manual describes the serial interface board as carrying line  drivers 
for both RS232 and RS422, which could explain the pos and neg data  outputs, 
but the serial clock and frame sync as shown on the interconnect  diagram 
imply synchronous serial comms rather than asynchronous.

 
I've also noticed that the interconnect diagram doesn't actually show  the 
IQ signals routed to the rear panel anyway, which is a bit odd as it's  
stated in the text that they are.
 
Shame, that could make for some fun experiments, although with the final IF 
 frequency being at 24KHz it seems that sound card based  demodulation 
might not be an easy option after all.
 
I'm wondering now if, as with the 3030, there were different versions  of 
the rear panel interface.
 
regards
 
Nigel
GM8PZR