Signals 1 Sigma 2 DeltaX = 0.2 * Sigma; 3 DeltaY = -0.1 * Sigma; 4 SYSTEM_CLOCK 5 FREF = 470KHz square (should this be pulsed ?) 6 Injection (or SYSTEM_CLOCK = 10MHz square ??) 7 H_CHANGE = +ve pulse 100ns 8 CYCLE_START = +ve pulse 100ns Marker CYCLE_END = +ve pulse 100ns