Standard Horizon Marine Tranciever GX1255S Operating Instructions

							GX1255SQUEST GX1255S
25 Watt VHF/FMMarine Transceiver
Owners ManuallRTCM SC-101 DSC Distress call with your exact posi-
tion when connected to a GPS
lCompact and Simple Operation
l3 year waterproof warranty
lBacklit Keypad and LCD displays latitude/longitude
when connected to a GPS
lChannel Name, GPS Time or GPS Position Repeating
shown on the display
lNOAA Weather Alert
lOne-button access to Channel 16 and 9
lAccess to all US, Canadian and International Channels
lVersatile User-programmable Scan, Priority Scan and
Dual Watch
lMicrophone with Channel Slection. 
						

							GX1255STABLE OF CONTENTS
SAFETY/WARNING INFORMATION...........................................................2
FCC RADIO LICENSE INFORMATION.......................................................3STATION  LICENSE..................................................................................................................................3RADIO  CALL  SIGN.................................................................................................................................3CANADIAN  SHIP  STATION  LICENSING.............................................................................................3
FCC NOTICE.................................................................................................4
1GENERAL INFORMATION.....................................................................5
1.1  INTRODUCTION...............................................................................................................................51.2  FCC/INDUSTRY  CANADA  INFORMATION..................................................................................5
2ACCESSORIES.......................................................................................6
2.1  PACKING  LIST.................................................................................................................................62.2  OPTIONS...........................................................................................................................................6
3INSTALLATION.......................................................................................7
3.1  LOCATION.........................................................................................................................................73.2  ELECTRICAL  CONNECTIONS.......................................................................................................73.3  ACCESSORY  CABLE......................................................................................................................83.4  OPTIONAL  CMB16  FLUSH MOUNT  INSTALLATION.................................................................94CONTROLS AND INDICATORS..........................................................10
4.1  CONTROLS  AND  CONNECTIONS.............................................................................................10
5BASIC OPERATION..............................................................................15
5.1  RECEPTION...................................................................................................................................155.2  TRANSMISSION.............................................................................................................................155.3  TRANSMIT  TIME-OUT  TIMER (TOT).........................................................................................155.4  SIMPLEX/DUPLEX  CHANNEL  USE...........................................................................................165.5  USA, CANADA, AND  INTERNATIONAL  MODE.........................................................................165.6  NOAA  WEATHER  CHANNELS...................................................................................................165.7  NOAA  WEATHER  ALERT............................................................................................................175.8  MEMORY  SCANNING (M-SCAN)................................................................................................185.9  PRIORITY  SCANNING (P-SCAN)................................................................................................185.10  POSITION  INDICATION.............................................................................................................195.11  TIME  INDICATION.......................................................................................................................195.12  RESETTING  THE  TRANSCEIVER’S  MICROPROCESSOR.................................................19
6DIGITAL SELECTIVE CALLING..........................................................20
6.1  GENERAL.......................................................................................................................................206.1.1  Digital  Selective  Calling (DSC).................................................................................................206.1.2  Maritime  Mobile  Service  Identity (MMSI)................................................................................206.2  SENDING  A  DISTRESS  CALL...................................................................................................216.3  SENDING  AN  INDIVIDUAL  CALL..............................................................................................226.4  SENDING  AN  ALL  SHIPS  CALL...............................................................................................236.5  RECEIVING  DSC  CALLS............................................................................................................246.5.1  Receiving  a  distress  call..........................................................................................................246.5.2  Receiving  a  distress  relay  call................................................................................................246.5.3  Receiving  an  all  ships  call.......................................................................................................256.5.4  Receiving  a  geographical  area  call........................................................................................256.5.5  Receiving  an  individual  call......................................................................................................266.5.6  Receiving  a  position  request...................................................................................................27 
						

							GX1255SPage 1 7DSC / RADIO SETUP MODE...............................................................287.1  LAMP  ADJUSTING........................................................................................................................287.2  LCD  CONTRAST  ADJUSTING....................................................................................................287.3  KEY  BEEP (ON OR OFF).............................................................................................................297.4  WEATHER  ALERT (ON OR OFF)................................................................................................297.5  CHANNEL  NAME  CHANGE........................................................................................................307.6  TIME  OFFSET...............................................................................................................................317.7  INDIVIDUAL  DIRECTORY  SETUP  (DSC).................................................................................327.8  INDIVIDUAL  REPLY......................................................................................................................337.9  INDIVIDUAL  ACK..........................................................................................................................337.10  INDIVIDUAL  RING......................................................................................................................347.11  POSITION  REQUEST  REPLY...................................................................................................347.12  DSC  SCANNING.........................................................................................................................357.13 USER  MMSI  INPUT....................................................................................................................36
8OPERATING PRACTICES....................................................................37
8.1  EMERGENCY (CHANNEL 16 USE).............................................................................................378.2  CALLING  ANOTHER  VESSEL (CHANNEL 16 OR 9)................................................................378.3  MAKING  TELEPHONE  CALLS...................................................................................................388.4  OPERATING  ON  CHANNELS  13  AND  67..............................................................................398.5  PROHIBITED  COMMUNICATIONS.............................................................................................398.6  NOAA  WEATHER  ALERT  TESTING..........................................................................................398.7  DIGITAL  SELECTIVE  CALLING (DSC)......................................................................................408.7.1  USCG  DSC  Watch....................................................................................................................408.8  MARITIME  MOBILE  SERVICE  IDENTITY (MMSI)...................................................................408.8.1  What  is  a  MMSI?......................................................................................................................408.9  USING  DIGITAL  SELECTIVE  CALLING  FEATURES..............................................................408.9.1  Distress  Call................................................................................................................................408.9.2  Individual  Call.............................................................................................................................408.9.3  Urgency  Call...............................................................................................................................408.9.4  Safety  Call...................................................................................................................................418.10  ADDITIONAL  DIGITAL  SELECTIVE  CALLING  INFORMATION...........................................418.11  ABOUT  VHF  RADIO...................................................................................................................418.12  SELECTING  AN ANTENNA........................................................................................................418.13  COAXIAL  CABLE........................................................................................................................42
9MAINTENANCE.....................................................................................43
9.1  REPLACEMENT  PARTS...............................................................................................................439.2  FACTORY  SERVICE.....................................................................................................................449.3  TROUBLESHOOTING  CHART....................................................................................................459.4 CONNECTION  OF  GPS  WITH  NMEA  OUTPUT.....................................................................46
10CHANNEL ASSIGNMENTS..................................................................47
11WARRANTY...........................................................................................51
12SPECIFICATIONS.................................................................................55TABLE OF CONTENTS 
						

							GX1255SPage 2Safety/Warning Information
This radio is restricted to occupational use, work related operations only
where the radio operator must have the knowledge to control the exposure
conditions of its passengers and bystanders by maintaining the minimum
separation distance of 0.6 m (2 feet).
Failure to observe these restrictions will result in exceeding the FCC RF
exposure limits.
Antenna Installation:
The antenna must be located at least 0.6 m (2 feet) away from passengers
in order to comply with the FCC RF exposure requirements.
For roof top installation, the antenna must be placed in the center of the
roof.
ON-LINE WARRANTY REGISTRATION
Please visit www.standardhorizon.com to register the QUEST Marine
VHF. It should be noted that visiting the Web site from time to time may
be beneficial to you, as new products are released they will appear on
the STANDARD HORIZON Web site.
PRODUCT SUPPORT INQUIRIES
If you have any questions or comments regarding the use of the QUEST,
you can visit the STANDARD HORIZON Web site to send an E-Mail or
contact the Product Support team at 800-767-2450 M-F 7:00-5:00PST. 
						

							GX1255SPage 3FCC RADIO LICENSE INFORMATION
Standard Horizon radios comply with the Federal Communication Commis-
sion (FCC) requirements that regulate the Maritime Radio Service.
STATION LICENSE
An FCC ship station license is no longer required for any vessel traveling in
U.S. waters which is under 20 meters in length. However, any vessel re-
quired to carry a marine radio on an international voyage, carrying a HF
single side band radiotelephone or marine satellite terminal is required to
have a ship station license. FCC license forms, including applications for
ship (506) and land station licenses can be downloaded via the Internet at
www.fcc.gov/forms. To obtain a form from the FCC, call (888) 225-5322.
RADIO CALL SIGN
Currently the FCC does not require recreational boaters to have a Ship Radio
Station License. The USCG recommends the boats registration number and
the state to be used.
CANADIAN SHIP STATION LICENSING
You may need a license when traveling in Canada.. If you do need a license
contact their nearest field office or regional office or write:
Industry Canada
Radio Regulatory Branch
Attn: DOSP
300 Slater Street
Ottawa, Ontario
Canada, KIA 0C8 
						

							GX1255SPage 4FCC NOTICE
NOTICE
Unauthorized changes or modifications to this equipment may void com-
pliance with FCC Rules. Any change or modification must be approved
in writing by STANDARD HORIZON.
NOTICE
This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be de-
termined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help. 
						

							GX1255SPage 51  GENERAL INFORMATION
1.1  INTRODUCTION
The STANDARD HORIZON QUEST is a VHF/FM transceiver designed for
use in the frequency range of 156.025 to 163.275 MHz. The GX1255S re-
quires 13.8V for operation and has a switchable RF output power of 1 watt
or 25 watts.
The transceiver is capable of RTCM SC101 DSC (Digital Selective Calling)
operation.
The transceiver operates on all currently-allocated marine channels which
are switchable for use with either USA, International, or Canadian regula-
tions. It has an emergency channel 16 which can be immediately selected
from any channel by pressing the red 16/9 key. NOAA Weather channels
can also be accessed immediately by pressing the WX key.
Other features of the transceiver include: scanning, priority scanning, sub-
mersible mic, high and low voltage warning, and GPS repeatability.
1.2  FCC/ INDUSTRY CANADA INFORMATION
The following data pertaining to the transceiver is necessary to fill out the
license application.
Type Acceptance........................................................................FCC Part 80
Output Power.............................................1 Watt (low) and 25 Watts (high)
Emission........................................................................16K0G3E, 16K0G2B
Frequency Range...................................................156.025 to 163.275 MHz
FCC Type Number....................................................................K66GX1255S
Industry Canada Type Approval.........................................511B-GX1255S V 
						

							GX1255SPage 62  ACCESSORIES
2.1  PACKING LIST
When the package containing the transceiver is first opened, please check
it for the following contents:
•GX1255S QUEST Transceiver (with White/Black Microphone)
•Mounting Bracket (with attaching hardware and hanger kit)
•Owner’s Manual
•Quick-Reference Card
•Power Cord
•Dust Cover
2.2  OPTIONS
CMB16...........................................................................Flush-Mount Bracket
101S..........................................................................Mini Extension Speaker
201SW....................................................................White Extension Speaker
201SW2...........................................White Flush Mount Extension Speaker
201SBK..................................................................Black Extension Speaker
201SBKZ...........................................Flush Mount Black Extension Speaker 
						

							GX1255S3  INSTALLATION
3.1  LOCATION
The radio can be mounted at any angle. Choose a mounting location that:
•is far enough from any compass to avoid any deviation in compass
reading due to the speaker magnet
•provides accessibility to the front panel controls
•allows connection to a power source and an antenna
•has nearby space for installation of a microphone hanger
•the antenna must be mounted at least 3 feet from radio
3.2  ELECTRICAL CONNECTIONS
CAUTION
Reverse polarity connections will damage the radio!
Connect the power cord and antenna to the radio. Antenna and Power Sup-
ply connections are as follows (see Figure 1):
1.Mount the antenna at least 3 feet away from the radio. At the rear of the
radio, connect the antenna cable. It must have a PL259 connector. RG-
8/U coaxial cable must be used if the antenna is 25 feet or more from the
radio. RG58 cable can be used for distances less than 25 feet.
2.Connect the red power wire to a 13.8 VDC ±20% power source. Connect
the black power wire to a negative ground.
3.If an optional remote extension speaker is to be used, refer to section
4.3 for connections.
4.It is advisable to have a Certified Marine Technician check the power
output and the standing wave ratio of the antenna after installation.Figure 1. General Installation
Page 7GPS Navigation Receiver
Accessory Cable Optional Speaker Antenna
Fuse
Red
Power Source
Black Water proof
Deck Outlet 
						

							GX1255S3.3  ACCESSORY CABLE
White: External speaker (+)
Shield: External speaker (–)
Blue: NMEA IN (+) from GPS navigation receiver
Green: NMEA IN (–) from GPS navigation receiver
Purple: Test port (for the Service Technician)
When connecting the external speaker or GPS navigation receiver, strip off
about 1 inch (2.5 cm) of the specified wire’s insulation.External Speaker
Green
Blue
Shield
WhiteBrown GreenWire Color/DescriptionWHITE - External Speaker (
+)SHILED - External Speaker (–)GREEN - NMEA GroundBLUE- NMEA Input (+)Connection ExamplesConnect to external 4 Ohm audio speakerConnect to external 4 Ohm audio speakerConnect to NMEA (–)
 connection of GPSConnect to NMEA (
+)
 output of GPSPage 8