Using SPICE (Simulation Program with Integrated Circuit Emphasis) simulations, this tutorial analyses the 10/700, circuit defined, surge generator and the 1.2/50-8/20, waveform defined, surge generator. The ITU-T originated the 10/700 surge generator for long distance network line testing and many of the ITU-T Recommendations use the 1.2/50-8/20 surge generator for short distance network line testing.
SPICE simulation was used to analyse the surge generator performances. The Linear Technology LTspice IV software was used for this tutorial. The 10/700 simulation objective was to define the tolerance of the component values used in the 10/700 circuit diagram given in ITU-T Recommendation K.44. The 1.2/50-8/20 simulation objective was to identify the most appropriate generator circuit diagram for modelling the 1.2/50-8/20 generator.