Microphones
Fireman’s Microphone
The Fireman’s Microphone Stations comprise a lockable wall mounting box housing a fist microphone and associated electronics. They will operate in an all-call mode even in the event of processor failure within the router.
The Fireman’s Microphone Stations comprise a lockable wall mounting box housing a fist microphone and associated electronics. They will operate in an all-call mode even in the event of processor failure within the router, as required by BS 5839 Pt 8.
Microphone audio is provided as a balanced 0dBu (nominal) analogue signal. An in-built signal limiting automatic gain control is provided to help compensate for varying operator technique. The microphone’s processor is responsible for generating an outgoing low-frequency surveillance tone which is used to monitor the audio connection to the VAR Router, while microphone capsule monitoring is performed by injection and monitoring of a signal such that either open or short circuit of the capsule or associated wiring will indicate a fault.
Certifications:- BS 5839
