Dear Colm, I think you may find the bandwidth is the issue in this case. The Red Pitaya (10 bit and 14 bit) seems to only have an input 50MHz (3dB) bandwidth, so you would only get 10-50MHz bandwidth (total bandwidth of 40MHz). There is also a 16 bit version, but I suspect it has a similar bandwidth, but docs are not that clear. We have only CASPERised the 10 bit and 14 bit versions to date.
The info below may help: Red Pitaya bandwidth info: https://redpitaya.readthedocs.io/en/latest/developerGuide/125-14/fastIO.html Red Pitaya spectrometer tutorial: https://casper-tutorials.readthedocs.io/en/latest/tutorials/redpitaya/tut_spec.html Maybe contact Nici Irimia at Red Pitaya and he will confirm the 16 bit versions: nicu.iri...@redpitaya.com I hope this helps. Kind regards, Adam Isaacson South African Radio Astronomy Observatory (SARAO) Hardware Manager Cell: (+27) 825639602 Tel: (+27) 215067300 email: aisaac...@ska.ac.za On Wed, Feb 5, 2020 at 3:06 PM Colm Bracken <colmbrac...@gmail.com> wrote: > Hello CASPER people, > > We are looking to build a spectrometer with not too demanding requirements. > Based on the specs below, would the Red Pitaya be up to the job do you > think? > Or, is there another, better suited (but similarly affordable) solution? > > Chanel widths: ~< 100 kHz > Time sampling: ~< millisecond > Polarisation: 2 channels > Antenna freq range: 10-85 MHz (total bandwidth of 75 MHz) > Digitisation: 14 bit > > Any advice on this would be great! > > Thanks in advance, > Colm > -- > > *Dr Colm Bracken* > Lecturer > Maynooth University Experimental Physics > > > Maynooth University, Maynooth, Co. Kildare, Ireland. > > T: +353 1 708 3641 > E: colm.brac...@mu.ie W: www.maynoothuniversity.ie > > Follow my work on https://nuim.academia.edu/ColmBracken > > > > And > > > Research Associate > > Astronomy & Astrophysics Section > School of Cosmic Physics > Dublin Institute for Advanced Studies > 31 Fitzwilliam Place > Dublin 2, D02 XF86 > > > > T: +353 1 440 6656 ext 352 > E: cbrac...@cp.dias.ie W: www.dias.ie/2017/06/22/dr-colm-bracken > > Follow my work on https://nuim.academia.edu/ColmBracken > > -- > You received this message because you are subscribed to the Google Groups " > casper@lists.berkeley.edu" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to casper+unsubscr...@lists.berkeley.edu. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAEx9wh8jNxeUnPGaSvwwuAtPCRsnNoCbOFnhbpU9EDb%2BPKh-Bg%40mail.gmail.com > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAEx9wh8jNxeUnPGaSvwwuAtPCRsnNoCbOFnhbpU9EDb%2BPKh-Bg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "casper@lists.berkeley.edu" group. To unsubscribe from this group and stop receiving emails from it, send an email to casper+unsubscr...@lists.berkeley.edu. To view this discussion on the web visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CADTJ%3DnEkB90h%2BF2hwXAOd9u33b8eusa02cBrsBq0125b%2BigsiQ%40mail.gmail.com.
