Standard Horizon Marine Tranciever GX1256S 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
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 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
GPS Navigation Receiver Accessory Cable Optional Speaker Antenna
Fuse
Red
Power SourceBlack Water proof
Deck Outlet 
						

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4.3  ACCESSORY CABLE
White: External speaker (+)
Shield: External speaker (–)
Blue: NMEA IN (+) from GPS navigation receiver
Green: NMEA common
Gray: NMEA OUT (+) to GPS navigation receiver
Brown: Test port (for the Service Technican)
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 (
+)
SHIELD - External Speaker (–)GREEN - NMEA GroundBLUE- NMEA Input (+)
GRAY- NMEA Output (+)
Connection ExamplesConnect  to external 4 Ohm audio speaker
Connect  to external 4 Ohm audio speakerConnect  to NMEA (–)
 connection of GPSConnect  to NMEA (
+)
 output of GPS
Connect  to NMEA (
+)
 input of GPS
External Speaker Green Gray
Blue
Shield
WhiteBrown Green Blue 
						

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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.
•QUEST+ is corresponded with following NMEA sentence:
• NMEA-0183 version 2.0 or higher
• GLL, GGA, RMC and GNS (RMC sentence is recommended)
If you have further inquires, please feel free to contact us at:
Phone: (800) 767-2450
Web site: standardhorizon.com
Email: [email protected]
4.5  CHECKING GPS CONNECTION
After connections have been made between the QUEST+ 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(
POS)]
 key until the
QUEST+ shows the Latitude and Longitude.
NOTE
The QUEST+ may be setup to show Lat/Lon or time received from a
connected GPS. To setup and show time refer to Section 6.18.
Manufacturer/ModelLowrance Portable
Magellan Fixed Mount
Magellan Portable
Northstar
Raytheon 420
Raytheon 520 / 620
Raytheon RL SERIES
Simrad
Sitex Neptune, Nautilus
WiresOrangeBlack (GND)GrayBlack (GND)OrangeBlack (GND)YellowBlack (GND)YellowBrownBlueBrownWhiteBrownWhiteBrownGrayBrown
QUEST+BlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreen
WiresGreenBlueBrownWhiteBlueWhiteBlackBlueBlack (GND)BrownBlack (GND)YellowGreenGreenBlackWhiteBlackWhiteBlack (GND)
Manufacturer/Model
STANDARD HORIZON
Furuno GP30, 36
Furuno GP1650, 1850
Garmin Fixed Mounts
Garmin Portables
JRC GPS500
JRC 100 SERIES
JRC 200 SERIES
Lowrance Fixed Mount
QUEST+GreenGrayBlueBlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreenBlueGreen 
						

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4.6  OPTIONAL MMB-84 FLUSH MOUNT INSTALLATION
1. Make a rectangular template for the flush mount measuring 2” H x
5-5/16” 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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4.7  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. RAM+ MIC Installation
Wall
Gasket
Cap
Nut RAM MIC Cable 
						

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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(
MEM)]
 and [
WX]
keys are held down, the internal microprocessor is reset. This clears the
memory and all user-programmed settings, such as scan memory. 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 on Resetting
the Transceiver’s Microprocessor.
NOTE
Resetting the microprocessor will not erase DSC MMSI and Direc-
tory Call information.
SQUELCH CONTROL (SQL)
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.
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
Please see secondary use for the [
WX]
 key. 
						

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Figure 4. Controls and Connectors 
						

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[
WX]
 Key
Immediately recalls the previously selected NOAA weather channel from
any channel location.
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(
MEM)]
 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 Resetting the Transceiver’s
Microprocessor.
[
DW(
IC)]
 Key
Watches for a transmission on CH16 and another selected channel until
either signal is received. (Dual watch)
NOTE: When the DSC SCANNING feature is enabled(see section 7.10
DSC SCANNING), the radio watches for a transmission on CH16, an-
other selected channel, and CH70 until either signal is received (Triple
watch).
Secondary use
Press and hold [
DW(
IC)]
 key, when the optional RAM+ Mic is connected,
intercom operation will operate between radio and RAM+ Mic.
[
H/L(
POS)]
 Key
Toggles between high and low power. When the [
H/L(
POS)]
 key is pressed
while the transceiver is on channel 13 or 67, the power will temporarily
switch from LO to HI power until the PTT is released. The [
H/L(
POS)]
key does not function on transmit inhibited and low power only channels.
Secondary use
Press and hold the [
H/L(
POS)]
 key to display the Position Data on the
LCD, when connected to the GPS receiver.
[
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 [
UP]
 or [
DOWN]
 key on radio are pressed, 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. 
						

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[
CALL/SET(
MENU)]
 Key
The [
CALL/SET(
MENU)]
 key functions as the enter key.
Secondary use
Press the [
CALL/SET(
MENU)]
 key to access the DSC OPERATION
menu. The INDIVIDUAL and ALL SHIPS CALLS functions can be ac-
cessed from the DSC OPERATION menu.
Press and hold the [
CALL/SET(
MENU)]
 key to access the RADIO or
DSC setup menu. The following functions can be accessed in the menu.
[
DISTRESS]
 Key
Used to send a DSC Distress Call. To send the distress call see section
6.2 (Sending a Distress Call).
[
UP]
 and [
DOWN]
 Keys
The [
UP]
 and [
DOWN]
 keys are used to select a desired channel and to
select items in the DSC OPERATION and SETUP menus. The [
UP]
 or
[
DOWN]
 key on the microphone can also be used to select channels.
RADIO SETUP MENU
DSC SETUP MENU 
						

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RAM MIC CONNECTOR
Connects the QUEST+ to the enhanced RAM+ MIC (Remote Access
Microphone). Refer to section 9 RAM+ MIC OPERATION.
ACCESSORY CONNECTION CABLE
Connects the radio to a GPS, and an external speaker.
DC INPUT CABLE
Connects the radio to a DC power supply of 13.8V
ANTENNA JACK
Connects an antenna to the transceiver. Use a marine VHF antenna with
an impedance of 50 ohms.
PTT (Push-To-Talk) SWITCH
Keys the transmitter.
MICROPHONE
Transmits the voice message with reduction of background noise.
[
UP(

)]
 and [
DOWN(
)]
 KEYS
The [
UP(

)]
 and [
DOWN(
)]
 on the microphone function the same as
the [
UP]
 and [
DOWN]
 key on the front panel of the transceiver.
[
16/9]
 Key
Pressing the [
16/9]
 key Immediately recalls channel 16 from any loca-
tion. Press and hold the [
16/9]
 key to recall channel 9. Pressing the
[
16/9]
 key again will revert the radio to the last channel selected.