Standard Horizon Marine Tranciever GX1280S Operating Instructions

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4  INSTALLATION
4.1  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
Note: To insure the radio does not affect the compass or radios performance
is not affected by the antenna location, temporarily connect the radio in the
desired location and:
a. Examine the compass to see if the radio causes any deviation
b. Connect the antenna and key the radio. Check to ensure the radio is
operating correctly by requesting a radio check.
4.2  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 theFigure 1. General Installation
GPS Navigation Receiver Accessory Cable Optional Speaker Antenna
Fuse
Red
Power SourceBlack Water proof
Deck Outlet 
						

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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
3.3 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.
4.3  ACCESSORY CABLE
White: External speaker (+)
Shield: External speaker (–)
Blue: NMEA IN (+) from GPS navigation receiver
Green: NMEA IN (–) from GPS navigation receiver
Gray: NMEA OUT (+) to GPS navigation receiver
Brown: 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, then splice the ends
together.
Wire Color/DescriptionWHITE - External Speaker (
+)SHILED - External Speaker (–)
GREEN - NMEA GroundBLUE- NMEA Input (+)GRAY-NMEA Output (+)
Connection ExamplesConnect to external 4 Ohm audio speakerConnect to external 4 Ohm audio speaker
Connect to NMEA (–)
 connection of GPSConnect to NMEA (
+)
 output of GPSConnect to NMEA (
+)
 input of GPS
External Speaker GreenGray
Blue
Shield
WhiteBrown Green Blue
16/9
WX
SCAN
H/LCALL
SET
SQL VOL/PWR
DISTRESS
IC MEM U.I.C
MENU
PULL OPENNAVDW
MATRIX 
						

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4.4  CONNECTION OF GPS WITH NMEA OUTPUT
Additional Information:
• The GPS must have the NMEA Output turned on and set to 4800 Baud
in the setup menu. If there is a selection for parity select none.
• For further information on interfacing /setting up your GPS. Please con-
tact the manufacturer of the GPS receiver.
•MATRIX can read NMEA-0183 version 2.0 or higher.
• The NMEA supported sentences are:
• GLL, GGA, RMC and GNS (RMC sentence is recommended)
If you have further inquires, please feel free to contact Product Support at:
Phone: (800) 767-2450
Email: 
[email protected]
Manufacturer/Model
Lowrance Portable
Magellan Fixed Mount
Magellan Portable
Northstar
Raytheon 420
Raytheon 520 / 620
Raytheon RL SERIES
Simrad
Sitex Neptune, Nautilus
Wires
Orange
Black (GND)
Gray
Black (GND)
Orange
Black (GND)
Yellow
Black (GND)
Yellow
Brown
Blue
Brown
White
Brown
White
Brown
Gray
Brown
MATRIX
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Wires
Green
Brown
White
Blue
White
Black
Blue
Black (GND)
Brown
Black (GND)
Yellow
Green
Green
Black
White
Black
White
Black (GND)
Manufacturer/Model
Furuno GP30, 36
Furuno GP1650, 1850
Garmin Fixed Mounts
Garmin Portables
JRC GPS500
JRC 100 SERIES
JRC 200 SERIES
Lowrance Fixed Mount
MATRIX
Green
Blue
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
Blue
Green
STANDARD HORIZON
CP150, CP160 and
CP-170C 
						

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4.5  CHECKING GPS CONNECTIONS
After connections have been made between the MATRIX and the GPS, a
small satellite icon will appear on the top right corner of the LCD display. To
see additional GPS information press and hold the [
H/L]
 (
NAV)
 key until the
MATRIX shows the Date, Time, SOG and COG.
4.6  CHANGING THE GPS TIME
From the Factory the MATRIX shows GPS satellite time or UTC time. A time
offset is needed to offset this time to show the local time in your area.
1. Press and hold down the [
CALL/SET]
 key until
“RADIO SETUP” menu appears.
2. Press the [
CALL/SET]
 key, then select “TIME SET”
with the CHANNEL selector knob.
3. Press the [
CALL/SET]
 key.
4. Turn the CHANNEL selector knob to select time
offset from UTC. See illustration below to find your
offset time from UTC. If “0:00” is assigned, the time
is the same as UTC (Universal Time Coordinated
or GMT Greenwich Mean Time).
5. Press the [
CALL/SET]
 key to store the time offset.
6. Press the [
16/9]
 key or turn the CHANNEL selector knob to select “EXIT,”
then press the [
CALL/SET]
 key to return to the “RADIO SETUP” menu,
select “EXIT” and press the [
CALL/SET]
 key to return to radio operation.
OFFSET TIME TABLE 
						

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4.7  CHANGING COG TO TRUE OR MAGNETIC
Allows customizing the NAV data showing GPS Course Over Ground (COG).
Factory default is True however following the steps below the COG can be
changed to Magnetic.
1. Press and hold down the [
CALL/SET]
 key until
“RADIO SETUP” menu appears.
2. Press the [
CALL/SET]
 key, then select “TRUE
MAG” in the “RADIO SETUP” menu with the
CHANNEL selector knob.
3. Press the [
CALL/SET]
 key.
4. Turn the CHANNEL selector knob to select “MAG-
NETIC” or “TRUE.”
5. Press the [
CALL/SET]
 key to store the selected
setting.
6. Turn the CHANNEL selector knob to select “EXIT,”
then press the [
CALL/SET]
 key to return to the “RADIO SETUP” menu,
select “EXIT” and press the [
CALL/SET]
 key to return to radio operation. 
						

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4.8  OPTIONAL MMB-84 FLUSH MOUNT INSTALLATION
1. Make a rectangular template for the flush mount measuring 2-5/8” H x
6-5/8” W.
2. Use the template to mark the location where the rectangular hole is to be
cut. Confirm the space behind the dash or panel is deep enough to ac-
commodate the transceiver (at least 6 inches deep).
There should be at least 1/2 inch between the transceiver’s heatsink and
any wiring, cables or structures.
3. Cut out the rectangular hole and insert the transceiver.
4. Fasten the brackets to the sides of the transceiver with the lock washer
nut combination; so that the mounting screw base faces the mounting
surface (see Figure 2).
5. Turn the adjusting screw to adjust the tension so that the transceiver is
tight against the mounting surface.
Figure 2. MMB-84 Flush Mount Instllation
Bracket
Adjusting Screw
Lock-washer nut combination 
						

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4.9  OPTIONAL CMP25 RAM+ MIC INSTALLATION
1. Connect the RAM+ MIC Cable to the RAM MIC CONNECTOR on the
rear panel, then tighten the Cable Nut (See Figure 3).
2. Referring to Figure 3, make a 1.2” (30 mm) hole in the wall, then insert
the RAM+ MIC Cable into this hole. Connect the Gasket and Mount Base
to the RAM+ MIC Cable Connector using the Nut.
3. Drill the four Screw holes (approx. 2 mm) on the wall, then install the
Mounting Base to the wall using four screws.
4. Put the Rubber Cap on to the Nut. The installation is now completed.
Figure 3. CMP25 RAM+ MIC Instllation
Wall
Gasket
Mounting Bracket RAM MIC CableCap
Nut 
						

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5  CONTROLS AND INDICATORS
NOTE
This section defines each control of the transceiver. See Figure 4 for
location of controls. For detailed operating instructions refer to chapter
6 of this manual.
5.1  CONTROLS AND CONNECTIONS
POWER SWITCH/VOLUME CONTROL
Turns the transceiver on and off as well as adjusts the audio volume. To
turn the transceiver on press and hold this knob until the LCD turns on.
To turn it off, press and hold this knob until the LCD turns off.  When the
power is turned on, the transceiver is set to the last selected channel.
Secondary Use
When the transceiver is turned on while the [
SCAN]
 and [
WX]
 keys are
held down, the internal microprocessor is reset. This clears the memory
and all user-programmed settings, such as scan memory, and priority
scan assignments. This condition is known as the default condition, the
same as when shipped from the factory. For a list of these defaults, see
the section 6.18  Resetting the Transceiver’s Microprocessor.
NOTE
Resetting the microprocess will not erase the DSC MMSI and the
Individual Directory Call information.
SQUELCH CONTROL (
SQL)
Adjusting this control clockwise, sets the point at which random noise on
the channel does not activate the audio circuits but a received signal
does. This point is called the squelch threshold. Further adjustment of
the squelch control will degrade reception of wanted transmissions.
CHANNEL SELECTOR KNOB
Rotary knob used to select channels and to choose menu items (such
as the DSC menu, radio setup and DSC setup menu). The [
UP(

)]
 /
[
DOWN(
)]
 key on the microphone can also be used to select channels
and menu items.
Secondary Use
While holding down the [
SCAN]
 Key and turning the CHANNEL selector
knob, you can confirm memory channels for scanning. 
						

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16/9
WX
SCAN
H/LCALL
SET
SQL VOL/PWR
DISTRESS
IC MEM U.I.C
MENU
PUL L OPENNAVDW
MATRIX
Figure 4. Controls and Connectors 
						

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KEYPAD
[
16/9]
 Key
Immediately recalls channel 16 from any channel location. Holding down
this key recalls channel 9. Pressing the [
16/9]
 key again reverts to the
previous selected working channel.
Secondary use
Press and hold the [
16/9]
 key then press the [
WX]
 key to switch between
USA, International and Canadian bands.
[
WX]
 Key
Immediately recalls the previously selected NOAA weather channel from
any channel.
Secondary use
1. Holding down the [
16/9]
 key while pressing the [
WX]
 key changes
the mode from USA to International or Canadian.
2. Holding down the [
WX]
 and [
SCAN]
 key while turning the power on
resets the microprocessor and erases scan channels from memory.
This clears the memory and establishes the factory-set defaults. For
a list of these defaults, see the section on 6.19 Resetting the
Transceiver ’s Microprocessor.
[
SCAN]
  
/ [
MEM]
Key
1. Starts and stops scanning of programmed channels.
2. If held while the [
UP(

)]
 or [
DOWN(
)]
 key on the microphone are
pressed or CHANNEL selector knob on radio is turned, the radio will
show the channels programmed in scan memory. This function will
not work if the unit is scanning.
NOTE: The priority channel is channel 16 only.
3. Pressing and holding again will delete the channel from scan memory.
[
H/L] 
/ [
NAV]
 Key
Toggles between 25 W (High) and 1 W (Low) power. When the [
H/L]
 key is
pressed while the transceiver is on channel 13 or 67, the power will tempo-
rarily switch from LO to HI power until the PTT is released. The [
H/L]
 key
does not function on transmit inhibited and low power only channels.
Secondary use
Press and hold [
H/L]
 key, the LCD displays NAV GPS Data, Time, SOG
(Speed Over Ground), and COG (Course Over Ground) when a GPS is
connected to the accessory cable of the MATRIX. See section 4.4 CON-
NECTION OF GPS WITH NMEA OUTPUT.