ARGOS FTT radio spectormeter - RadioNet

Specifications2 x AD-conversionInput resolution2 x 1GS/sec8 bit voltage = 24dBInterlaced → 2GS/sRate : programmable→ 48 bit powerMax number of channels16’384programmableChannel spacing61.035KHzAt full sampling rateConversion time16.384µsecInternal data width18 bitTwiddlesMinimum average timeMaximum average timeWindowing1ms (64 integrations)70’000 sec (≈ 1 day)Programmable filterPC duty cycle ≈ 50%Output dataPCI interface 32bit x 33 MHzInternally 36bit

Block diagram AC240Opt.DRAMOpt.SRAMCh1Ch2Additional digital l/OAnalog outputPreamp1GHzPreamp1GHzCrossPointSwitchDigital processing UnitFPGAXilinx Virtex-2 proXC2VP70∆t=0.5nsecADC 11Gs/s8 bitADC 21Gs/s8 bitDemux 18 bits x 16Demux 28 bits x 162 x 128 bitsExttriggerTriggerTimeBaseControllerPCIInterfacePCIBusExtclock

PCB AC240 with option FFT on FPGA

DFT computation method2 Gs/srealevenoddjΣ16 k FFTPipelinecomplex inputcomplex outputPostProcessingUnit16K → 32K1 Gs/scomplexRedundantdata2 x 1 Gs/sreal1 Gs/scomplex1 Gs/scomplex

32K FFT with 2GS/s throughputc = complex data

FFT structure 7 x Radix-4

Overview of AC240 FDK CoresDDR SDRAMExtension (512MB)DDR SDRAMExtension (512MB)Dua l Port SRAMExte nsionDDR Controller ADDR Controller BDual Port InterfaceWR Buffe rRD Buffe rWR Buffe rRD Buffe rI/O Exte nsionDa ta LinkUser-DefinedProcessing BlockLocalBusDa ta LinkTriggerMAC100MAC100

VHDL design with Mentor tools

Utilisation of internal FPGA resourcesRAM 1kx8 282/328 usedMultipliers 208/328 usedNo use of internalPowerPC foreseen

Preliminary results from lab

SchedulePlannedIn fact1. Start of KTI-project: 2003-11-01 2004-11-012. Decision system architecture: 2004-03-18 2004-03-183. Preliminary tests of 1 st implementation: 2004-08-30 2004-09-304. System ready for Radio Astronomy: 2004-12-20 ?5. Scientific analysis, fist results: 2005-03-07 ?6. End of project, closing report to KTI: 2005-04-02 ?

Status FPGA design todayBlockInput structurePipelinesOutput structureImplementation100%90%90%Verification10%10%10%

CostsAcqiris sampler basic versionOption FFT with firmwareStandard PC with a free PCI-slotFFT – spectrometer24’000 Euro4’000 Euro2’000 Euro30’000 EuroSome statistics to remember….:1,8 Euro per FFT-channel or33KHz bandwidth for every single Euro

Budget, Team & InfoKTI – Grant Nr. 6421.2 IWS-IW(Knowledge Technologies International)[Kommission für Technologie und Innovation]Due industry (Acqiris Geneva)+ running SNF request (Swiss National Foundation)for 58’000 Euro, but → approvedTotal approved:192’000 Euro334’000 Euro32’000 Euro558’000 EuroProject management & tests: ETH Zurich, Prof. A. O. Benz, Chr. Monstein, Hansueli MeyerAlgorithms: FHS (Fachhochschule Solothurn), Dr. Bruno StuberVHDL design: ZMA (Zentrum für Mikroelektronik Aargau), Prof. K. Schenk & D. ZardetIndustry: Acqiris company Geneva, Dr. V. Hungerbühler et. al.Additional information:http://www.astro.phys.ethz.ch/instrument/argos/argos_nf.htmlhttp://www.acqiris.com