AstroFFT - Astronomical Digital SpectrometerEmploying the latest in Field programmable gate array (FPGA) technology the spectrometer can capture and process signals of up to 25 MHz bandwidth in real time. The use of FPGA technology allows different processing algorithms to be downloaded into the FPGA's.
The current system employs two separate FPGA processing engines. Each has two 50 MHz 14 bit analogue to digital converters feeding a 4096 point 14bit FFT algorithm. The power components of the resulting frequency spectrum are integrated over time and the results sent to the host. The FFT performs the 4096 point FFT in 82 micro seconds.