SIMULATOR OF RADIO SOURCES Russian patent published in 1997 - IPC

FIELD: radio engineering, in particular, testing of operations of radio systems using automatic test beds and half-natural models of different radio systems. SUBSTANCE: multiple-channel device has code setter with interface, reference frequency grid generator, adding unit. Each simulation channel has digital frequency synthesizer, unit which controls bandwidth settings, unit which controls power of signal, channel number decoder, master oscillator, frequency converter, first and second modulators and output attenuator. Said units in simulation channel are connected to code setter. Reference frequency grid generator is connected to all simulation channels, code setter and computer. Adder joins signals from outputs of output attenuators of simulation channels. Direct generation of flow signals and their superposition in time proceeds as follows: signal images are stored in memory unit of unit which controls bandwidth settings, to first and second modulators. Rate and intervals for reading signal images from memory unit are provided for timers of unit which controls bandwidth settings, unit which controls signal spectrum and unit which controls power of signal. Initial start of generation of signal flow is done by arrival of synchronization signal simultaneously to all channels or according to program which determines signal superposition. Reference frequency generated by frequency grid generator determine bandwidth of signals depending on data which are read from memory unit of unit which controls bandwidth settings, and are sent to commutator of reference frequencies and commutator of frequency converter of each channel. Spectrum of signals is generated in corresponding digital frequency synthesizers. Their amplitude characteristics depend on second modulators. Device design provides possibility of superposition of source or reflected signals from several different objects which may move in space. EFFECT: possibility to design complex scripts of alternating environment or signal flow at input of equipment to be designed or tested. 9 cl, 11 dwg