PuMa, a digital pulsar machine

J. L L Voûte, M. L A Kouwenhoven, P. C. Van Haren, J. J. Langerak, B. W. Stappers, D. Driesens, R. Ramachandran, Th D. Beijaard

    Research output: Contribution to journalArticlepeer-review


    We have designed and constructed PuMa, a pulsar machine that has both a baseband recording and a digital filterbank mode. Its design is based on the use of digital signal processors (DSPs). Their operation is controlled by software, which makes PuMa reconfigurable, flexible and easy to operate. The maximum number of channels in the digital filterbank mode is 32 768 over a bandwidth of 80 MHz. This makes PuMa suitable for pulsar observations at low sky frequencies. The maximum bandwidth is baseband recording mode is two times 10 MHz. The machine was installed at the Westerbork Synthesis Radio Telescope in the Netherlands in 1998. We discuss in some detail PuMa's technical properties and capabilities. Recent observations, a sample of which are presented here, demonstrate its capabilities and that it is performing up to its specifications.
    Original languageEnglish
    Pages (from-to)733-742
    Number of pages9
    JournalAstronomy and Astrophysics
    Issue number2
    Publication statusPublished - Apr 2002


    • Instrumentation: detectors
    • Instrumentation: miscellaneous
    • Pulsars: general


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