Radio selective calling receiver disturbance wave sensitivity survey instrument

摘要

PURPOSE:To save the check time and the check cost per one set of receiver by providing an operating disturbing wave level storage section, a desired wave distributer, plural variable attenuators and a disturbing wave distributer to the check device. CONSTITUTION:Prior to the start for checking the sensitivity of disturbing wave reception, a main control section 1 sets a calling number of two radio selective calling receivers 14a, 14b being objects of check to an encoder 4, and sets a frequency and a transmission level of a desired wave to a desired wave signal generator 5. The desired wave signal generator 5 outputs a desired wave burst signal modulated by a coded signal generated from the encoder 4. A disturbing wave signal generator 8 outputs a disturbing wave of a set level. The output is given to a disturbing wave distributer 9, in which the signal is divided equally into two, they are given to synthesizers 10a, 10b respectively, where they are respectively synthesized through variable attenuators 7a, 7b and a resulting radio wave is sent from transmission antennas 12a, 12b. When a reception reply comes, the disturbing wave level at that time is read from a storage section 2.