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DM Engineering


Detector System w/Relay Output


The DM Engineering Silence Sense Jr. is a microprocessor based system that accepts single ended audio with a user-adjustable input level control. It features adjustable silence detect time duration of from 5 seconds to 4 minutes (approx.), with switch selectable momentary or continuous relay contact closure output. The unit automatically resets with the reapplication of audio, and is provided with battery backup and an AC power adaptor. The Silence Sense Jr. may be installed at studio or transmitter locations and interfaced with auto-dialing remote controls for instant notification of studio, STL, or phone line audio failures or can be interfaced with a sounder or light sources for alerting of personnel.


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  • Main Features:
  • Input: Impedance is 10K ohms minimum, single ended, screw terminal block connection
  • Input Level: -30 to +10 dbm., input adjustable
  • Silence Detect Time: 5 seconds, to 4 min. (approx.), user adjustable
  • Output: Normally open single pole relay contacts, 1 Amp rating @ 30 VDC, 1 second momentary or continuous closure...switch selectable, with screw terminal block connection
  • Power Requirements: Supplied adapter, 115 VAC to 9VDC, 500 ma (supplied)
  • Battery Back-up Requirements: 9 VDC alkaline battery, NEDA 1604A (supplied)
  • Size: 4.4 x 2.6 x 1.1
  • Shipping Weight: Approximately 2 lbs.