Installation Instructions

The SC8-ADTX Radio Transmitter is an integral component of the Radio Fire Alarm Box system.
No field repairs or adjustments are allowed by the end user. A factory technician is the only
person allowed to service the Radio Fire Alarm Box. If it is decided that the SC8-ADTX Radio
Transmitter is not operating properly, replace the transmitter as follows.
• Completely power down the Fire Radio Alarm Box
• Loosen but do not remove the 2 screws securing the SC8-ADTX transmitter to the
backplate
• Slide the transmitter sideways to remove it from the backplate.
• Disconnect the Antenna cable connector from the transmitter
• Disconnect the Power/Signal connector from the transmitter
• Install a new transmitter which is factory programmed to the same channel frequency
• Connect the Antenna cable to the new transmitter through an In-Line Wattmetter with
a 2.5 Watt element rated for 72-76 MHz.
• Connect the Power/Signal connectors to the new transmitter
• Place the new transmitter onto the backplate by sliding the mounting tabs under the
screws and tighten the screws to secure the new transmitter to the backplate
• Power the Radio Fire Alarm Box and verify that the transmitter is working properly by
reading 1W RF power burst 1 second in duration (repeated twice)
• After verifying proper operation, disconnect the In-Line Wattmeter and connect the
antenna cable directly to the SC8-ADTX transmitter.