BriarTek ORCA RX-102 Manual de usuario

Overboard Recovery

Communications

Apparatus (ORCA®)

RX-102 Receiver

User’s Manual

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For technical support, contact BriarTek at 703-548-7892 or through our website at

www.briartek.com.

Introduction

ORCA®(Overboard Recovery Communications Apparatus) is a personal water-activated man

overboard (MOB) alarm system developed by BriarTek Incorporated and utilized by the US

Department of Defense and other mariners. The alarm system includes a transmitter, receiver and

direction finder. The RX-102 receiver is a single channel VHF (121.5 MHz) receiver with an

embedded microprocessor and push button interface. The RX-102 is designed to receive a signal

from an ORCA®transmitter. When an ORCA® transmitter is activated, the transmitter emits a radio

frequency (RF) signal. A visual and audible (100 dB) alarm on the receiver sounds upon receipt of

this signal indicating the identity of the MOB. If the transmitter is not disabled within one (1) minute,

it will begin transmitting a signal that is processed by the direction finder, providing a continuous

bearing to the MOB.

RX-102 Parts Overview

A- Liquid Crystal Display (LCD)

B- Backlight (Yellow)

C- Clear MOB (Red)

D- Silence (Green)

E- Piezoelectric Buzzer

F- Serial Connector

G- Antenna Jack

H- Power Jack

I – Volume Control

J- Power On/Off

K- Fuse Holder

L- Helical Antenna

Figure 3. RX-A102 Antenna

Figure 2. RX-102 (top end view)

Figure 1. RX-102

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.

Visual Alarm Display

a. The LCD is a 4 x 20 character display.

b. If no ORCA® signal is present -

Line 1: “Scanning”

Line 4: RSSI

b. If ORCA® signal is detected -

Line 1: Vessel ID; transmitter serial number

Line 4: ORCA® transmitter battery strength (“Battery Good/Weak”); RSSI

Backlight Button (Yellow) - During low light or no-light situations, press the Backlight button (B)

to illuminate the LCD. Press the Backlight button again to turn off illumination.

NOTE

Pressing Backlight button during "darken ship"

operations is not recommended due to interference

with night vision.

Clear MOB Button (Red) - Press the Clear MOB button to remove ID(s) from receiver’s memory.

This function is provided to allow the user the ability to remove the ID information from the

receiver in the event it did not receive the "All Clear" from a transmitter after a successful rescue

or during testing.

Silence Button (Green) - Press the Silence button to silence the audible alarm.

Installation Notes

The installation notes provided herein are intended to serve as a guide only. They do not serve

as material required for the certification of technicians for the installation, repair or alteration of

the ORCA® system.

a. General

The RX-102 is typically installed in the pilothouse and should be mounted in a location

so that the audible alarm is easily heard, the push buttons are easily accessible and the

LCD is readable by watch standers.

b. Mounting the receiver

The receiver should be mounted to a fiddleboard or part of the super structure such as a

bulkhead. Mount the receiver brackets using appropriate fasteners (self-tapping screws

or 1/4x20 machine screws with locknuts/washers). The receiver brackets are designed

with slots to allow for flexibility in mounting the receiver. Once the brackets are securely

mounted, secure the receiver to the brackets by inserting the threaded mounts (4) into

each of the bracket side slots (2 each x 2 brackets). Finally, adjust the angle of the

receiver by tilting forward or back as desired and thread the knobs (4) onto each of the

threaded mounts until snug.

c. Power connection

Twelve or twenty four volts DC is required to provide power to the system. An optional

battery backup will supply power to the receiver for 1 hour in the event power to the

circuit is lost.

d. General

The receiver antenna should be located in an elevated location (above the pilothouse or

vessel’s mast) to ensure that the ORCA® signal is received. The higher the antenna is

mounted, the better range can be expected. In addition, to avoid signal loss caused by

excessive cable length, the coaxial cable length between the RX 102 receiver and

antenna should not exceed 150 feet.

e. Mounting the receiver antenna

The receiver antenna is over molded to a 90stainless steel bracket and coaxial cable.

The bracket has 2 holes which are used for securing to a foundation (see RX-102

Antenna specifications for hole dimensions). The foundation should be a similar metal as

the super structure or mast to which the foundation is being welded. A UHF connector is

supplied with the antenna/cable. For cable assembly and installation instructions, follow

the guidance provided in the Receiver Antenna/Cable Install Guide located on the

BriarTek website.

Maintenance And Troubleshooting

Inspection

a. Inspect receiver for excessive wear.

b. Check for salt buildup at the coaxial cable connector to the receiver, as this may indicate

saltwater intrusion at the antenna mount connector.

c. Inspect antenna and antenna mount for excessive wear.

d. If any parts are broken, missing or excessively worn, replace as necessary.

Testing - Ensure antenna is connected to UHF coaxial antenna connector and receiver is

plugged into power source. With one individual at the receiver to observe receiver alarm, and a

second individual operating the transmitter from the bow or stern (whichever is further from the

antenna) of the vessel, perform operational test of the RX-102 as follows:

NOTE

Record transmitter serial number for the test. Serial

number is located on side of transmitter.

NOTE

Before beginning full system testing, notify

pilothouse and other ORCA®-equipped vessels

within range that testing of the ORCA® system will

occur.

a. If receiver is not already on, turn on receiver at rocker switch.

b. Press the backlight (yellow) button to illuminate LCD. Press backlight button again to

turn off LCD illumination.

c. Activate ORCA® transmitter (if using a TX-103 transmitter, rotate the manual switch

from the OFF position to the ON position. If using a TX-104 transmitter, short the two

water contacts using a 5"-10" long wire or submerge transmitter in saltwater until

transmitter DML illuminates).

a. Ensure RX-102 LCD displays the serial number of the transmitter.

b. After the RX-102 audible alarm activates, toggle the volume switch between low and

high.

c. Press the Silence (green) button to silence the alarm.

d. Deactivate ORCA® transmitter (if using a TX-103 transmitter, rotate the manual switch

from the ON position to the OFF position; if using a TX-104 transmitter, align the

antenna tip with the round recess on the face of the transmitter until the DML stops

illuminating).

e. Ensure LCD displays “All Clear MOB ####" on line 1 and “Batt. Good/Weak” on line 2.

f. Activate ORCA® transmitter. Remove battery from transmitter. Press Clear MOB (red)

button. Observe LCD displays “Clearing MOB list. Erasing. Please Wait. Done”.

Troubleshooting - In the event of equipment malfunction, perform troubleshooting procedures:

a. Power failure:

(1) Ensure power switch is turned ON.

(2) Ensure receiver is connected to power source:

- Check power at power supply / battery backup (if installed) using voltmeter.

- Check power at power panel.

(3) Inspect fuse in fuse holder.

If receiver still fails to turn on, replace receiver.

b. Receiver does not receive signal from ORCA® transmitter:

(1) Ensure UHF antenna cable connector is securely fastened to antenna jack.

(2) Trace antenna cable for broken/frayed wire.

(3) Ensure antenna is securely mounted to bracket and connected to cable.

If receiver still fails to receive signal from ORCA® transmitter, replace receiver.

c. Receiver does not display “Scanning” during normal scanning mode (no transmitter

activated):

Turn OFF receiver at Power On/Off rocker switch; wait 5 seconds and turn ON.

If receiver still displays “Scanning”, replace receiver.

d. RSSI consistently displays -90 dBm or stronger:

(1) Determine if there are any active emitters transmitting at/near 121.5 MHz. If so, turn

off emitters.

(2) Observe RSSI.

(3) If RSSI is still reading strong, determine if emitters from another source (ship or

ground-based) are active.

If above troubleshooting steps do not address the problem and the receiver has been put in

service within the past year, contact BriarTek. Provide the following information:

- Ship Name

- Time observed (number of days or hours)

- Which radiating systems were being used at the time (e.g. Navigation Radar)

- Ship's general location/operating area

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Parts List

System Subsystem Part Number Component Description (Nameplate Data) Mfr

ORCA Receiver ORCARX-102

Receiver: 100 db audible alarm; touchscreen

LCD; hardened enclosure; mounting bracket;

121.5 MHz; power requirement - 12 VDC

BriarTek

ORCA Receiver ORCARX-A102

Receiver antenna: Overmolded helical

antenna with mounting bracket and Heliax

cable; includes UHF connector

BriarTek

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