Monitoring and supervising receiver of the SVITAVA army local pager system. In that system, the encoder delivers two-tone sequential combination (any two tones out of 7 possible), thus giving 42 variations of selective page address. This receiver is equipped with 7 tone detectors to monitor the correct encoding and transmission of the page signal. The receiver's frequency is fixed one out of the pager's RF range (about 2MHz).
More pictures to come in the process of cleanup & restoration. No documentation so far.