Instruction Manual

Y1-03-0229E 7
The ARX-50 has three large, circular push buttons and seven LEDs that
indicate settings. The push buttons switch between alternate modes. Each
button is assigned a set of functions. See Figure 1. Each button “beeps”
when depressed. The LED indicators are either red or green to signify the
system mode. Green LEDs signify that the system is in a normal state and
red LEDs signify that the system is in an atypical state.
Turn on the ARX-50
The red OFF LED will be illuminated while the system is turned off, yet is
still connected to a power supply. To turn on the ARX-50, depress the
On/Off button. The LEDs will blink on and off, and the green On LED will
illuminate. Set to default at the factory, the alarm mode is active on channel
121.5 MHz. Some signal level indicators may flicker while the unit searches
for a signal.
Choose Alarm mode or Monitor mode
Alarm mode
The Alarm mode for the ARX-50 is the system’s default mode. In this mode,
the radio beacon signal detector circuitry is activated, i.e., The system is
ready to detect 121.5 MHz signals.
In Alarm mode, the speaker is silenced until a 121.5 MHz beacon signal is
detected, at which time a loud audible siren and a flashing bright red LED
are activated.
The ARX-50 detects an activated Mini B™
300
beacon, and other activated
beacons that transmit 121.5 MHz signals.
The ARX-50 is designed to only detect an alarm on 121.5 MHz signals that
originate from an activated beacon.
The signal strength meter is always active in this mode. If there is a strong
signal that is not from a beacon, the signal strength will still be displayed on
the signal strength meter, but the ARX-50 will not alarm.
Monitor High mode
This mode is intended for advanced users to obtain more information about
a received signal.
NOTE: The ARX-50 reverts back to Alarm mode after 15 minutes in
Monitor High mode.
In the monitor modes, the ARX-50 detector circuitry is deactivated. The
demodulated 121.5 MHz audio signal is annunciated at all times. If there is
not any signal on the 121.5 MHz carrier, whether activated beacon or other
source, static will be audible. The speaker volume is high, and the signal
strength meter is active.