4 ms·
I’d go for the widest real-time BW and best phase noise (clock jitter), as there are things you can do with offset tuning, low IF, and decimation to get around
by madengr 7y ago
I’d go for the widest real-time BW and best phase noise (clock jitter), as there are things you can do with offset tuning, low IF, and decimation to get around some of the spurs and dynamic range limitations that are inherent in these direct conversion transceivers.
A few external components (LNA, filter) can make a large increase in performance, so specs like noise figure are minimal for many applications.
- jjoonathan 7y agoThat's good advice. But yes, the best way to cure the ailments of zero-IF is to use low-IF, and the best way to cure the ailments of low-IF is to use high-IF and filters -- and we're back to standard RF architecture. Nothing will make you respect traditional superheterodyne architecture quite like fighting with software image suppression / signal path correction.
- drmpeg 7y agoOr direct sampling. Although they're expensive, there are 10 Gsps ADC's these days. https://www.analog.com/en/products/ad9213.html https://www.analog.com/en/products/ad9213.html
- yourapostasy 7y agoHoly moly you weren't kidding, they're nearly $6K USD apiece. Does anyone's SDR kit drive these?