DEVICE TESTING FORM OF SIGNALS OF PULSE-POSITION RADIO NAVIGATION SYSTEM Russian patent published in 1998 - IPC

FIELD: radio navigation. SUBSTANCE: given invention may be used in equipment of transmitting stations and test points of pulse-position radio navigation system of loran C type for test of form of radio pulse signals emitted by system transmitter. Device incorporates analog-to-digital converter, storage, storage circuit, calculation and indication unit, pulse generator, counters, control unit, commutator, OR gate. Key parameters characterizing form of radio pulse signal ( amplitude values and length of half-waves of high-frequency filling that are brought out to display of calculation and indication unit for operator's control of form of radio pulses ) are determined in device by analog-to-digital conversion, coherent accumulation of selects of input signals and their subsequent mathematical processing in calculation and indication unit. Increased accuracy of control is achieved due to coherence of accumulation of selects which is ensured by phase autotuning of frequency of master generator with the aid of network including frequency divider, phase discriminator, detector of train of strobes, delay element, low-pass filter. Trains of input initiation strobes accompanying tested radio pulses and strictly tied to time of coming are used as reference signal of system of phase of frequency. Specific discrete character of reference signal makes for originality of suggested technical solution. EFFECT: increased accuracy of test of form of radio pulses. 6 dwg