[en] The light mark system for the amplification coefficient stabilization of the 64-channel radiation detector on the basis of cherenkov counters from lead glass, is described. The functional scheme and time diagram of the stable light mark system work, consisting of light pulse former, driving oscillator, thermostat control scheme, delay scheme, key elements and key control block, are presented. The system operates in two regimes of stabilization and linearity. In the stabilization regime light pulses, imitating electrons with the pulse up to 10 GeV/s, are generated. The long-time mark stability at the light diode of the thermostatic treatment equals +-0.3%. In the linearity regime without the breaking in the stabilization regime two different light pulses are generated additionally, that provides the control of spectrometric track linearity