First steps: Adding a README

README.md

+.h2 Dwingeloo Radio Telescope Backend
+
+The FPGA based backend in the Dwingeloo Radio telescope digitizes the IF signal
+and performs real time digital signal processing on it. It is used for all
+radio astronomy observations, such as live or recorded pulsar observations and
+21cm (Hydrogen line) observations.
+
+Design and realization by Paul Boven (p.boven@xs4all.nl).
+(c) Paul Boven, released under the GPLv2.
+
+Specifications:
+* 70 MS/s, real
+* 10 bits
+* two channels (one implemented)
+* 1Gb/s 1000base-T (RJ-45) Ethernet
+* External clock (140 MHz)
+
+Main components:
+* Xilinx Spartan-3 1800a DSP kit
+> * Xilinx Spartan-3 1800a DSP FPGA
+> * Phyter V Ethernet Phy
+* AD9218 ADC (2x 10 bits 65 MHz)
+
+