Standard Horizon Marine Tranciever GX1256S Operating Instructions

GX1256SPage 11
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...

GX1256SPage 12
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...

GX1256SPage 13
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...

GX1256SPage 14
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....

GX1256SPage 15
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...

GX1256SPage 16
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...

GX1256SPage 17
Figure 4. Controls and Connectors 

GX1256SPage 18
[
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...

GX1256SPage 19
[
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...

GX1256SPage 20
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...