Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

DSP kit, Cyclone II edition

Hi guys, I have a Cyclone II DSP kit and it includes DACs and ADCs. I have tried to get them to work by using pin assignment on a Quartus II project, but there's nothing coming off the DAC (...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi all

I have implemented a two channel DDC (four signals) using CII-DSP-DSK (DSP builder) and I have no big problems at all. DAC_B output signals have to be routed using pin assig. in DSP builder 6.1 .Upgrading to 7.1 solves that issue as it has full support for channels A and B in both converters (AD and DA)

Notes:

-¿Are you using DSP builder? You should have recieved a license for it with your kit.

-DAC's are AC coupled using minicircuits' ADT1-1WT which is rated from 400KHz to 800 MHz

So not only DC levels are not allowed but anything bellow 200 KHz (in my measurements, YMMV). Does anybody know why altera designers have used a 75 Ohm trafo in their design?:confused: