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

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

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

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

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

hi michael, if you decide you want to have 48 downconverters, and then use a low rate 48 input ADC board, then a) you could implement downconverters with connectorized (eg:minicircuits) mixers, filters, amplifiers about $100 per channel b) you could make your own PCB, or perhaps use

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

On 05/25/2018 12:04 PM, Michael Inggs wrote: Hi Dan One of the tradeoff studies the guys are doing is the cost of a 48 channel analogue downconverter and low sample rate ADC. At present, direct demod with a SNAP looks simpler in terms of hardware complexity, but has not been costed. One of

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

Hi Dan One of the tradeoff studies the guys are doing is the cost of a 48 channel analogue downconverter and low sample rate ADC. At present, direct demod with a SNAP looks simpler in terms of hardware complexity, but has not been costed. One of the team has actually implemented all the digital

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

On 05/25/2018 11:28 AM, Vinand Prayag wrote: Marcus: Yes, each station should normally have the same number of antennas which are dual pol. So each pol gets digitised and then we intend to just track a source in the main beam in the first instance, and then move to beam forming. We are still

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

Marcus: Yes, each station should normally have the same number of antennas which are dual pol. So each pol gets digitised and then we intend to just track a source in the main beam in the first instance, and then move to beam forming. We are still investigating the possibility of fewer channels

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

On 05/25/2018 11:01 AM, Vinand Prayag wrote: Yes, you are absolutely right. I have had numerous conversations with Prof Rogers about building a new Deuterium focused array in the Southern Hemisphere and we found out that the scientific contributions that the instrument would be extremely

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

Yes, you are absolutely right. I have had numerous conversations with Prof Rogers about building a new Deuterium focused array in the Southern Hemisphere and we found out that the scientific contributions that the instrument would be extremely valuable. Vinand Prayag Research Assistant University

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

if vinand, if you want to digitize 48 signals with 250 KHz bandwidth, you might want to consider purchasing a 48 input PCIe ADC board and doing the signal processing in a computer (in software). (not use FPGA boards). but then you'd have to mix the deuterium line to baseband, so you'd need 48

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

On 05/25/2018 09:24 AM, Vinand Prayag wrote: Hi, Please find attached the User Requirement. The bandwidth is actually only 250KHz Cheers, Vinand Are you envisaging an array, like the D1 telescope at Haystack? On Fri, May 25, 2018 at 5:20 PM Marcus D. Leech

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

Hi, Please find attached the User Requirement. The bandwidth is actually only 250KHz Cheers, Vinand On Fri, May 25, 2018 at 5:20 PM Marcus D. Leech wrote: > On 05/25/2018 07:28 AM, Vinand Prayag wrote: > > Hi all, > > We are looking at building a telescope in Mauritius

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

On 05/25/2018 07:28 AM, Vinand Prayag wrote: Hi all, We are looking at building a telescope in Mauritius which is called the Mauritius Deuterium Telescope, MDT for short. As the name suggests it is a Deuterium focused experiment. We have planned for a pathfinder station to be built for the

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

I think we can help. Send me an email kris...@gmail.com Regards Kris On Fri, 25 May 2018, 14:14 Vinand Prayag, wrote: > Hi Kristian, > > We need 48 RF channels and a 250MSPs sampling rate should do the trick. Do > you the cost of the TPM module? > > Cheers, > Vinand > > >

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

Depending on your requirements, you could look at the tpm module that wqs designed for the ska low frquency aperture array. Cheers Kris On Fri, 25 May 2018, 13:29 Vinand Prayag, wrote: > Hi all, > > We are looking at building a telescope in Mauritius which is called the >