[en] The schematic diagram of the discriminator operating according to the method of ''tracking threshold'' and designed for the operation with proportional chambers, readout of coordinate information from which is accomplished by means of delay lines, is described. Four single width channels are integrated into a CAMAC module. The dynamic range of negative input pulses is 0.15-4ν. The time yiter of an output signal constitutes <=0.4 ns within the above range. Comparison of characteristics of the discriminator with those of the discriminator, operating on the principle of ''zero crossing'', is presented