What about making most of them short and then some of them really long? On Tue, Apr 12, 2016 at 1:49 PM, Adam Beardsley <[email protected]> wrote:
> My concern would be pushing any cable reflection contamination to modes in > the window. Currently only a small subset of MWA antennas have 150 meter > cables, but the reflection line shows up very clearly. 45 meters puts the > delay right at 0.2 h/Mpc, which is where we do a lot of our sensitivity > forecasts. I doubt moving to 0.3 would change sensitivity much, but just > food for thought. > > -Adam > > On Tue, Apr 12, 2016 at 1:26 PM danny jacobs <[email protected]> > wrote: > >> The 35m length has been worrying me a little lately. Would there be any >> downsides like having a different spectral response for the longer cables? >> >> ~D >> >> On Tue, Apr 12, 2016 at 1:24 PM, DAVID DEBOER <[email protected]> >> wrote: >> >>> Hi - I was thinking about the analog cable lengths a bit. We have a >>> spec at 35 m (30m+the vertical part to the feed). This puts the delay at >>> about 0.15h/Mpc. Would it be advantageous to have, say, most of the cable >>> lengths at 25m and a smaller subset at 45m? >>> >>> Dave >>> >> >> >> >> -- >> ================================================================ >> Daniel C. Jacobs >> KE7DHQ >> National Science Foundation Fellow >> Arizona State University >> School of Earth and Space Exploration >> Low Frequency Cosmology >> Phone: (505) 500 4521 >> Homepage: http://loco.lab.asu.edu/danny_jacobs/ >> MWA: mwatelescope.org >> HERA: reionization.org >> PAPER: eor.berkeley.edu >> > -- ================================================================ Daniel C. Jacobs KE7DHQ National Science Foundation Fellow Arizona State University School of Earth and Space Exploration Low Frequency Cosmology Phone: (505) 500 4521 Homepage: http://loco.lab.asu.edu/danny_jacobs/ MWA: mwatelescope.org HERA: reionization.org PAPER: eor.berkeley.edu
