Yes, I assumed that was the case. However, it is not clear from the X300 documentation how sharp those filters are. Can you tell me how wide the transition band is at the lower sample rates?
To give you some context, I would like to use an X300 (or X310) with a UBX-160 daughterboard to digitise the entire 2.4 GHz Wi-Fi band, which is 83.5 MHz wide. Ideally I would like to use a sample rate of 100 Msps to minimise the data rate between the USRP and the host PC. However, before I do this I need to be certain that the usable bandwidth at this sample rate will be greater than 83.5 MHz. Is this information documented somewhere? On Tue, 18 Feb 2025 at 23:11, Marcus D Leech <patchvonbr...@gmail.com> wrote: > There will always be some edge roll off. Decimation includes filtering and > those filters cannot be infinitely steep. > Sent from my iPhone > > > On Feb 18, 2025, at 2:12 AM, Brendan Horsfield < > brendan.horsfi...@vectalabs.com> wrote: > > > > > > Hi All, > > > > I have a question about the usable bandwidth of the X300 USRP / UBX-160 > daughterboard combo at sampling rates below 200 Msps: > > > > As I understand it, the UBX-160 receiver has an analog (hardware) filter > before the ADC that limits the usable bandwidth to 160 MHz, while the ADC > runs at 200 Msps. Therefore the usable bandwidth is around 80% of the > sample rate. > > > > My question is: What is the usable bandwidth at lower sampling rates? > Does the 80% factor always apply? > > > > For example, if I set the decimation factor to 4, so that my sampling > rate is 50 Msps, does this mean that the usable bandwidth will be 40 MHz? > > > > Thanks & Regards, > > Brendan. > > > > _______________________________________________ > > USRP-users mailing list -- usrp-users@lists.ettus.com > > To unsubscribe send an email to usrp-users-le...@lists.ettus.com >
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