BriarTek ORCA RX-102, Руководство пользователя, Страница: 5 / 15

6
RX-102 Operating Instructions
Activation and Receiver Display
a. When a transmitter from own ship is activated, an alarm signal (continuous warble) is
sounded at the receiver buzzer. The vessel identification and transmitter serial number
are displayed on the LCD.
b. When a transmitter from another vessel is activated and within range, an alarm signal
(chirp) is sounded and the vessel identification as well as the serial number of the
transmitter, is displayed on the LCD.
c. When an alarm signal is received, whether own ship or other vessel, line 4 will indicate
the transmitter’s battery strength, “Good” or “Weak.”
d. Received Signal Strength Indication (RSSI) is also displayed on line 4 of the LCD. RSSI
is a measure of the field strength (radio waves at 121.5MHz), at the antenna input.
NOTE
RSSI is not a measure of beacon signal strength.
This indicator is useful for several reasons: It can help determine if a non-ORCA® signal
is interfering with the operation of the ORCA® system. It can help to diagnose problems
with the ORCA® equipment, such as broken antenna cables.
NOTE
RSSI is expressed in negative numbers, -141dBm being
the weakest and -10 dBm being the strongest signal.
Typically if no systems are interfering with the ORCA®
system and there are no beacons turned on, the
background signal strength level will be between -130 and
-110 dBm. If the background RSSI is stronger than -90
dBm (-10dBm > RSSI > -90 dBm), then the ORCA®
beacon will not be able to be received except in very close
proximity to the ship.
Audible Alarm - When the receiver detects the FM signal emitted by the transmitter, the buzzer
emits a 100 dB (max) audible alarm. The audible alarm will continue to sound until either the
transmitter is turned OFF, sending an "All Clear" signal to the receiver; or the Silence button is
pressed.
Volume - The receiver's volume can be adjusted to 1 of 2 settings using the volume control
toggle switch.