Hi Andrew, Thanks for this information.
To be more specific, we would like to change the attenuation in the KatADC RF front end every 20 ms and we can allow up to 1 ms of dead time/settling time. Do you think this can work? A related question is how to change this attenuation. I tried using a software register connected to atten* inputs of the KatADC yellow block, but the design would not compile. I have not got time to check at what stage it fails, but I can look into that. I got the design compiled by connecting just the "constant" blocks to these inputs. Is it first of all allowed to have a software register there? If not, what would be the way to change this attenuation dynamically? Thanks, Nimish On Thu, Mar 8, 2012 at 11:22 PM, Andrew Martens <and...@ska.ac.za> wrote: > Hi Nimish > > > > Assuming we have a software register connected to the KatADC atten0 > > input, how often/fast can we change the attenuation? > > > The change in value triggers an IIC operation using a controller in the > katADC yellow block. The rate at which you can change the > attenuatation/enable is thus probably on the order of kHz. It was not > designed to be switched rapidly. If you need more detail I could look in > the controller. > > Regards > Andrew > > > > >
