BUILT-IN TEST SIGNAL GENERATOR

摘要

PURPOSE:To obtain a built-in test signal which simulates a reflected signal from a target by using part of a transmitted signal from a transmitter as it is or converting it by 180 deg.. CONSTITUTION:A signal X1 which is part of the transmitted signal is switched by a changeover switch 9a with a switching signal X2 from a controller 12. Then, it is inputted to a changeover switch 9b directly or through a 180 deg. phase shifter 10 and switched into an output signal X3 with a switching signal X2 from a controller 12. The signal X3 is pulse-modulated by a pulse modulator 11 with a pulse modulating signal X4 from the controller 12 to obtain the built-in test signal (BITE signal) X4.