On 5/27/16 6:58 PM, Hal Murray wrote:
bruce.griffi...@xtra.co.nz said:
All the filtering and down mixing is done in the digital domain.
Anitialiasing filters in front of the ADCs are also be required.
What sort of bandwidth is expected?
The usual trick with audio ADCs is to have a low cost analog filter that
does't have a sharp corner but lets everything you want through, sample at a
high rate - say 16x, run that through a digital filter with a sharp cutoff,
then decimate down to the desired sample rate.
The USRP uses fast ADCs intended for the wireless market. Sample rates
are >50MSPS. You can get daughter cards which have an analog PLL and
mixer to tune over a wider band - as you can imagine, 2.5 and 5.8 GHz
are popular.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
