Re: [casper] Availability of SNAP board for the Mauritius Deuterium Telescope

2018-05-26 Thread Dan Werthimer
hi vinand, i agree with your analysis. the direct RF sampling option is simpler and has a cleaner signal path (downconverters could introduce unwanted artifacts, image rejection problems...). another lower cost option is to use a pair of snaps, and a pair of adc16 boards, to get 56 inputs. the

Re: [casper] Availability of SNAP board for the Mauritius Deuterium Telescope

2018-05-26 Thread Marcus D. Leech
On 05/26/2018 03:23 AM, Vinand Prayag wrote: Hi Dan, The downconversion was the first idea that we had before Prof Inggs steered us towards the SNAPs. I made a quick costs overview: If each channel cost $100. Total cost for 48 is $4800. PCIe ADC with 16channels at 1MSPs will come at $500

Re: [casper] Availability of SNAP board for the Mauritius Deuterium Telescope

2018-05-26 Thread Vinand Prayag
Hi Dan, The downconversion was the first idea that we had before Prof Inggs steered us towards the SNAPs. I made a quick costs overview: If each channel cost $100. Total cost for 48 is $4800. PCIe ADC with 16channels at 1MSPs will come at $500 each. Three of these will be $1500. Add to that the