We like to use your new if-wideband-rx-subsystem AD6676 for our newtuner generation and I have two question regarding this device:
Our system data rate is 101.875MHz and we like to use the internalsynthesizer and the output decimation filter. If we use the 32decimation the fadc and fsynthesizer will be 3.26GHz and this is out ofthe specification in your datasheet. (fadc and fsynth max. 3.2GHz) Wetested this setting with your eval kit and it seems to work. So howcritical is this 60MHz higher frequency for your device?
We bought the evaluation kit with the HSC-ADC-EVALEZ and we like to savethe captured data for further (our own) analyses in Matlab. Your Matlabbased tool can configure the device and plot the spectrum, IQ-diagrametc. Is there a possibility to save the captured data in a file? Or canyou provide us the matlab sources from your tool?
According to PL, the customer could discover that they can operate the AD6676 and its CLK SYN up to 4 GHz on the EVB so there is a lot of margin to accommodate customer's desire to operate at 3.26 GHz. This is because we originally designed the ADC core (and CLK SYN) to operate up to 4 GHz clock rate.However, a max ADC core clock rate has been specified with an upper limit of 3.2 GHz to ensure that characterization specifications are met over all PVT (Process, Supply voltage, Temp variations ). This is not guaranteed at ~4GHz. According to the PL, they do not see an issue operating it at 3.26 GHz but ADI cannot guarantee because it is out of specification.
If you are using MATLAB based AD6676 ADC Analyzer tool, the 'Save Data' option under 'Data Display Windows' in Direct output mode data window stores the data by default in '\Results\FFTdata\DataStamp' folder (Section : Data Display Windows (Figure 22) in Link1).
If you are using VisualAnalog, (AN-905), AD6676 Samples Canvas -> Graph ->Save As ->allows you to choose from the currently plotted analysis data and save to a comma-separated values (.csv) file which can be exported in external platforms such as MATLAB for further analysis. For capturing data related to FFT analysis you can choose the respective FFT canvas to store the analysis data in a similar manner.
References:VisualAnalog Converter Evaluation Tool User Manual Application Note AN-905http://www.analog.com/media/en/technical-documentation/application-notes/AN-905.pdf