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Radio Receivers, Fire helmets, Public Safety Plectron R-520 receiver manufactured in 1974. A Plectron is a specialized VHF / UHF single-channel, emergency alerting radio receiver , used to activate emergency response personnel, and disaster warning systems.
The system uses a distinctive "WHOOP" tone that was originally produced for Federal Signal's line of fire alarms. The system is tested on the second Monday of every month at 6:00pm. [6] Alaska has many Federal Signal Modulators and Eclipse 8s on their All Hazard Siren System. They sound for tsunamis as well.
Indian Creek Fire Department (Fayetteville, IN) paging tones activating Motorola Minitor pager. Minitor pagers, depending on the model and application, can operate in the VHF Low Band, VHF High Band, and UHF frequency ranges. They are alerted by using two-tone sequential Selective calling, generally following the Motorola Quick Call II standard ...
95 dB @ 3,100 Hz tone are used in many current notification devices. [1] 80 dB @ 520 Hz tone are used in newer notification devices. [1] 70 dB to 100 dB weighted for human hearing (higher decibels, in the 100 to 115 dB range, were common with older electromechanical horns) [citation needed] Light (visible signals) 15 cd to 1,000 cd candela ...
A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire or a fire alarm activation. Typically installed on street corners or on the outside of commercial buildings in urban areas, they were the main means of summoning firefighters before the general availability of telephones.
Tone remotes send commands to a base station using function tones, a series of two tones in sequence. The first tone is 2,175 Hz and is 100-300 milliseconds in length. [6] The most common second tone is 1,950 Hz. The most commonly used tone sequence in tone remote controls is the channel 1 transmit command.
Within two years of the introduction of the Mark II, the Mark IIXG system became available which included support for 3.5-inch (89 mm) high density floppy disks, built-in non-volatile memory for song storage, multi-track recording, and an on-board tone generator which supported several sound sets including General MIDI (GM), Roland's General ...
SiraTone products are/were used for natural disaster notification, HAZMAT incident notification, fire call systems, and more. [1] The SiraTone product line is no longer in production. The product line was succeeded by the Modulator and DSA (Directional Speaker Array) electronic outdoor warning sirens.
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