Standard Horizon Marine Tranciever GX1256S Operating Instructions

GX1256SPage 1 

Compact and Simple Operation
Capable of connecting an optional enhanced RAM+ second sta-
tion remote microphone

RTCM SC-101 DSC Distress call with your exact position


DSC position request/send function and NMEA data input/out-
put to connect to GPS Plotter

DSC Group call feature included

Backlit Keypad and LCD
Channel Name, GPS Time or GPS Position Repeating shown on
the display


One-button access to Channel 16 and 9

NOAA Weather Alert
Versatile User-programmable Scan, Priority...

GX1256SPage 2
TABLE OF CONTENTS
SAFETY/WARNING INFORMATION .......................................................... 4
FCC RADIO LICENSE INFORMATION ...................................................... 5
STATION  LICENSE ............................................................................................................................5RADIO  CALL  SIGN ............................................................................................................................5CANADIAN  SHIP...

GX1256SPage 3
7 DIGITAL SELECTIVE CALLING........................................................ 297.1  GENERAL ..................................................................................................................................297.2  DSC  SCAN ...............................................................................................................................307.3  USCG  DSC  WATCH...

GX1256SPage 4
SAFETY / 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...

GX1256SPage 5
FCC 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...

GX1256SPage 6
FCC 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...

GX1256SPage 7
GETTING STARTED
ABOUT VHF RADIO
The radio frequencies used in the VHF marine band lie between 156 and
158 MHz with some shore stations available between 161 and 163 MHz.
The marine VHF band provides communications over distances that are
essentially “line of sight” (VHF signals do not travel well through objects
such as buildings, hills or trees). Actual transmission range depends much
more on antenna type, gain and height than on the power output of the
transmitter. On a fixed mount 25W...

GX1256SPage 8
COAXIAL CABLE
VHF antennas are connected to the transceiver by means of a coaxial cable
– a shielded transmission line. Coaxial cable is specified by it’s diameter
and construction.
For runs less than 20 feet, RG-58/U, about 1/4 inch in diameter is a good
choice. For runs over 20 feet but less than 50 feet, the larger RG-8X or RG-
213/U should be used for cable runs over 50 feet RG-8U should be used.
For installation of the connector onto the coaxial cable refer to the figure
below.
To get...

GX1256SPage 9
1  GENERAL INFORMATION
The STANDARD HORIZON QUEST+ is a VHF/FM transceiver designed for
use in the frequency range of 156.025 to 163.275 MHz. The  GX1256S re-
quires 13.8V for operation and has a switchable RF output power of 1 wat\
t
or 25 watts.
The transceiver is capable of RTCM SC101 DSC (Digital Selective Calling)
operation.
The transceiver operates on all currently-allocated marine channels whic\
h
are switchable for use with either USA, International, or Canadian regul\
a-
tions. It...

GX1256SPage 10
2  PACKING LIST
When the package containing the transceiver is first opened, please check
it for the following contents:
•GX1256S QUEST+ Transceiver (with White/Black Microphone)
• Mounting Bracket (with attaching hardware and hanger kit)
• Owner’s Manual
• Quick-Reference Card
• Power Cord
• Dust Cover
3  OPTIONS
MMB-84 ........................................................................Flush-Mount Bracket
CMP25B/W............Remote-Access Microphone (RAM+ Mic, Black/White)
CT-100...