Also look at the reading list section of the wiki.
Chris says:
FPGA spectrometer: I mentioned that the minimum useful integration time
I could achieve on my ROACH2 with 2048 8-bit channels at 2.4 GHz BW was
~100 ms. Looking around, it seems the GUPPI and PUPPI backends on Green
Bank can achieve ~50 microsecond integrations (4096 channels, 8 bit, 600
MHz BW) so clearly this can be optimized (
https://safe.nrao.edu/wiki/bin/view/CICADA/NGNPPPSpecifications). The GUPPI
instrument was used to make the z=0.8 21-cm x WiggleZ detection on Green
Bank (cross correlation here: http://arxiv.org/abs/1208.0331;
auto-correlation here: http://arxiv.org/abs/1304.3712). The detection is
based on ~200 hrs of data, spread roughly evenly over a ~10 deg^2 field and
a ~30 deg^2 field. They report a ~25 K system temperature.
A instrument to look at:
http://www3.mpifr-bonn.mpg.de/staff/bklein/FFTS/RPG-XFFTS_DataSheet.pdf
Also look at the reading list section of the wiki.
Chris says:
FPGA spectrometer: I mentioned that the minimum useful integration time I could achieve on my ROACH2 with 2048 8-bit channels at 2.4 GHz BW was ~100 ms. Looking around, it seems the GUPPI and PUPPI backends on Green Bank can achieve ~50 microsecond integrations (4096 channels, 8 bit, 600 MHz BW) so clearly this can be optimized ( https://safe.nrao.edu/wiki/bin/view/CICADA/NGNPPPSpecifications). The GUPPI instrument was used to make the z=0.8 21-cm x WiggleZ detection on Green Bank (cross correlation here: http://arxiv.org/abs/1208.0331; auto-correlation here: http://arxiv.org/abs/1304.3712). The detection is based on ~200 hrs of data, spread roughly evenly over a ~10 deg^2 field and a ~30 deg^2 field. They report a ~25 K system temperature.