Standard Horizon Marine Radio GX1250S User Manual

GX1250S  
Horizon Eclipse+  
25 watt VHF/FM  
Marine Transceiver  
Owner’s Manual  
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1
GENERAL INFORMATION  
1.1 INTRODUCTION  
The Standard Communications Corp. (SCC) GX1250S Eclipse+ is a VHF  
transceiver designed for use in the frequency range of 156.050 to  
163.275 MHz. It requires 13.8 VDC for operation.  
The transceiver has 65 channels: 55 marine and 10 weather. The 55  
marine channels are switchable to comply with either USA, International,  
or Canadian regulations. It has an emergency channel 16 which can be  
immediately selected from any channel by pressing the red 16/9 key.  
Weather channels can be also be accessed immediately by pressing the  
WX key.  
The power output is 25 watts in high range and 1 watt in the low range.  
These ranges are manually selected by the front-panel H/L key, except  
on channels where low range power is mandatory. On these channels  
low range is automatically selected.  
1.2 FCC/DOC INFORMATION  
The following data pertaining to the transceiver is necessary to fill out the  
license application.  
FCC Type Accepted...............................................................FCC Part 80  
Output Power .........................................1 watt (Low) and 25 watts (High)  
Emission ............................................................................................16F3  
Frequency Range ...............................................156.050 to 163.275 MHz  
FCC Type Number......................................................................APV0493  
DOC Type Approval........................................................363822161LVCA  
Owner's Manual  
GX1250S  
Page 1  
 
Additional FCC and DOC data, including licensing requirements,  
are contained in the companion document titled OWNER’S  
MANUAL SUPPLEMENT. The document also contains charts for  
VHF channel assignments, transceiver procedures,  
maintenance, factory service information, and warranty data.  
2
ACCESSORIES  
2.1 PACKING LIST  
When the package containing the transceiver is first opened, please  
check it for the following contents:  
• GX1250S Eclipse+ Transceiver.  
• CMP348W Microphone (Attached to the transceiver).  
• Mounting Bracket and attaching hardware.  
• Power Cable.  
• Owner’s Manual.  
• Owner’s Manual Supplement.  
• Hanger Kit for Microphone.  
2.2 OPTIONS  
CMB16......................................................................Flush-Mount Bracket  
201S ...........................Remote Extension Speaker with RCA Phono Plug  
201SZ ......................................................................Flush-mount Speaker  
101...............................................................................Extension Speaker  
2.3 REPLACEMENT PARTS  
Microphone Assembly ..........................................................MP51000240  
Microphone Hanger ...............................................................277X155020  
Mounting Bracket...................................................................175B160020  
Mounting Bracket Knob .........................................................414C154022  
Volume Knob .........................................................................175B154500  
Squelch Knob ........................................................................175B154010  
Owner's Manual  
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GX1250S  
 
3
CONTROLS AND INDICATORS  
Refer to Figure 1 for the location of the following controls, indicators, and  
connections:  
3.1 CONTROLS AND CONNECTIONS  
q
POWER SWITCH/VOLUME CONTROL  
Turns the transceiver on and off, and adjusts the volume.  
w
SQUELCH CONTROL  
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 degrades reception of wanted transmissions.  
e
KEY PAD  
UP KEY  
Selects the desired channel. Each press increases the channel  
number. When held down, channels increase continuously.  
DN KEY  
Selects the desired channel. Each press decreases the channel  
number. When held down, channels decrease continuously.  
H/L KEY  
Toggles between high and low transmitting power. This key does not  
operate on “low power only” and transmission-inhibited channels.  
When held down while the transceiver is on channel 13 or 67, the  
power temporarily enters high range.  
WX KEY  
Immediately recalls a weather channel 01 from any channel location.  
Reverts the transceiver to the previous channel when pressed twice  
after 16/9 key is pressed.  
Owner's Manual  
GX1250S  
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q
FRONT PANEL  
t
w
SQL  
VOL  
UP  
DN  
H / L  
SCAN  
R/D  
WX  
16 / 9  
Horizon ECLIPSE +  
U I C  
r
REAR PANEL  
e
i
y
u
MICROPHONE  
FRONT VIEW  
o
!
TOP VIEW  
DN  
UP  
!
!
Figure 1. Controls and Connectors  
Owner's Manual  
Page 4  
GX1250S  
 
SCAN KEY  
Starts and stops scanning programmed channels. Holding down this  
key, scanning channels are programmed.  
16/9 KEY  
Immediately recalls channel 16 from any channel location. Holding  
down this key recalls channel 9. When held down while pressing the  
WX key, changes the mode from USA to International or Canadian.  
When held down while turning the power on, microprocessor is reset  
and scan channels are erased.  
r
t
SPEAKER  
LIQUID-CRYSTAL DISPLAY (LCD)  
See Section 3.2 for Indicators.  
y
ANTENNA JACK  
Connects the antenna to the transceiver. Use a marine VHF antenna  
with an impedance of 50 ohms.  
u
i
DC INPUT CABLE  
Connects the transceiver to a DC power supply of 13.8 V.  
EXTERNAL SPEAKER JACK  
Connects an optional external speaker to the transceiver. Use a  
speaker with an impedance of 4 or 8 ohms, with an RCA phono plug.  
o
!
MICROPHONE  
Transmits a voice message.  
PUSH-TO-TALK (PTT) SWITCH  
Activates transmission.  
Owner's Manual  
GX1250S  
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!
!
UP KEY  
Selects the desired channel. Each press increases the channel  
number. When held down the channel numbers increase  
continuously.  
DOWN KEY  
Selects the desired channel. Each press decreases the channel  
number. When held down the channel numbers decrease  
continuously.  
3.2 INDICATORS  
I
C
U
T X  
H I  
LO  
WX  
A
Figure 2. Indicators  
The LCD on the transceiver has several symbols and indicators that  
should be understood by the user before operating the unit. Figure 2  
shows all of these symbols and indicators, although it is not possible to  
see them at the same time.  
U/I/C Indicator  
Indicates the mode of operation (USA, International or Canadian) for  
a particular channel.  
WX Indicator  
Indicates a weather channel.  
Owner's Manual  
Page 6  
GX1250S  
 
TX Indicator  
Transmission indicator. The TX indicator appears when th PTT switch  
is pressed and it is O.K. to transmit.  
MEM Indicator  
Indicates the channel is memorized in the transceiver’s memory.  
A Indicator  
Indicates a simplex channel in USA or Canadian mode whose  
counterpart in the International mode is a duplex channel.  
7-SEGMENT Display  
Displays the channel number in use.  
HI/LO Indicator  
Indicates the power setting. “HI” 25 watts and “LO” 1 watt. This  
display is blank if a transmission-inhibited channel is selected.  
Owner's Manual  
GX1250S  
Page 7  
 
4
INSTALLATION  
4.1 FREQUENCY AND DEVIATION TESTS  
FCC regulations require that the transceiver’s deviation and frequency  
be tested before initial installation or operation. This test should be  
performed by a Certified Marine Technician.  
4.2 LOCATION  
1. The transceiver can be mounted at any angle. Choose a mounting  
location that:  
• is far enough from any compass to avoid erroneous compass  
reading due to the speaker magnet  
• provides protection from sea spray and rain  
• 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  
2. Install the unit in accordance with paragraph 4.3 or 4.4.  
In each appears an instruction to connect the power supply and  
antenna. Where that appears, the following three steps should be  
performed:  
a. At the rear of the transceiver, connect the antenna cable to the  
antenna jack. The antenna must have a PL259 connector. RG8 or  
RG213 coaxial cable must be used if the antenna is 25 feet or  
more from the transceiver. RG58 cable can be used for distances  
less than 25 feet.  
b. Connect the red power cord to a 13.8 VDC ± 20 % power source.  
Connect the black power cord to negative ground. See Figure 3 for  
this step .  
c. It is advisable to have a Certified Marine Technician check the  
power output and the standing wave ratio of the antenna after  
installation.  
Owner's Manual  
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GX1250S  
 
WATERPROOF  
DECK OUTLET  
SPEAKER  
(OPTIONAL)  
BATTERY  
Figure 3. General Installation  
Figure 4. Regular Mounting Bracket  
Figure 5. CMB16 Mounting Bracket  
Owner's Manual  
GX1250S  
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4.3 INSTALLATION USING REGULAR MOUNTING  
BRACKET  
1. Mount the bracket using the washers, nuts, and long hex head bolts.  
2. Thread the mylar washers onto the mounting bracket knobs.  
3. Position the transceiver within the bracket arms, matching the  
transceiver notches to obtain the desired positioning.  
4. Secure the transceiver to the brackets with the mounting knobs (see  
Figure 4).  
5. Connect the antenna and power cables (and optional speaker) to the  
transceiver.  
4.4 INSTALLATION USING CMB16 FLUSH MOUNT  
BRACKET (Optional)  
Refer to Figure 5 for the following procedure.  
1. Use the template supplied with the CMB16 to mark the location  
(inner template) where the rectangular hole (5-5/16 by 2-1/16 inches)  
is to be made. Confirm the space behind the dash or panel is deep  
enough to accommodate the transceiver. There should be at least  
1/2 inch between the transceiver’s heatsink (fins) and any wiring,  
cables or structures.  
2. Cut out the rectangular hole and insert the transceiver.  
3. Fasten the brackets to the sides of the transceiver with the lock  
washer nut combination, so the mounting screw base faces the  
mounting surface (see Figure 5).  
4. Turn the adjusting screws to adjust the tension so the transceiver is  
against the mounting surface.  
Owner's Manual  
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GX1250S  
 
5
OPERATION  
After the transceiver has been installed (see section 4), ensure the  
power supply and antenna are properly connected.  
5.1 RECEPTION  
1. Turn the POWER SWITCH/VOLUME CONTROL on.  
2. Turn the volume control knob to the desired level.  
3. Turn the SQUELCH CONTROL knob fully counterclockwise. This  
state is known as “squelch off”.  
4. Turn up the volume until noise or audio from the speaker is at a  
comfortable level.  
5. Select a channel that has no signal being received (no one is  
transmitting on the channel). Only noise should be heard.  
6. Slowly turn the SQUELCH CONTROL knob clockwise and stop  
immediately after the noise disappears. This condition is known as  
the “Squelch Threshold”. If the SQUELCH CONTROL knob is turned  
clockwise past this point, weak signals are not received. No noise  
and no signals are heard until a signal is received that exceeds the  
squelch threshold.  
7. To change channels, press the UP or DN key. Sometimes, a slight  
adjustment of the squelch threshold needs to be made, because  
some channels have a higher noise level than others.  
Please refer to the Owner’s Manual Supplement for a complete  
listing of all USA, International and Canadian VHF Marine channels  
and their usages.  
5.2 TRANSMISSION  
1. Perform steps 1 through 7 of RECEPTION.  
2. Before transmitting, monitor the channel and make sure it is clear.  
THIS IS AN FCC REQUIREMENT!  
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GX1250S  
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3. Press the PTT (push - to - talk) switch. The TX indicator in the LCD is  
displayed.  
4. Speak slowly and clearly into the microphone, hold the microphone  
about 1/2 to 1 inch away from your mouth.  
5. When the transmission is finished, release the PTT switch.  
6. Refer to the OWNER’S MANUAL SUPPLEMENT for standard  
transceiver operating procedures.  
5.3 TRANSMIT TIME - OUT TIMER (TOT)  
When the PTT switch is held down, transmission time is limited to 5  
minutes. This prevents prolonged unintentional transmissions. About 10  
seconds before automatic transmitter shutdown, a warning beep is heard  
from the speaker. The transceiver then automatically switches to the  
receiving mode, even if the PTT switch is still held down. Before  
transmitting again, the PTT switch must first be released and be pressed  
again.  
5.4 USA, INTERNATIONAL AND CANADIAN MODES  
1. To change the modes, hold down the 16/9 key and press the WX  
key. The mode changes from USA to International to Canadian with  
each press of the WX key.  
2. “U” is displayed for the USA mode, “I” is displayed for International  
mode, and “C” is displayed for Canadian mode.  
3 Refer to the OWNER’S MANUAL SUPPLEMENT for the allocated  
channels in each mode.  
5.5 WEATHER CHANNELS  
1. To receive a weather channel, press the WX key. The transceiver  
changes channel to the weather channel 01.  
2. Press the UP or DN key to move to other weather channels.  
3. To exit from the weather channels, press the WX key. The transceiver  
returns to the channel it was on prior to the weather channel.  
Owner's Manual  
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GX1250S  
 
5.6 SCANNING  
1. Adjust the SQUELCH CONTROL until the background noise  
disappears.  
2. Select the desired channel to be scanned using the UP or DN key.  
3. Hold down the SCAN key until “MEM” is displayed.  
4. Repeat steps 2 and 3 for the channels to be scanned.  
5. To start scanning, press the SCAN key. Scanning proceeds from  
the lowest to the highest programmed channel number and stops on  
a channel where a transmission is received.  
6. To stop scanning, press the 16/9, WX, SCAN key, or PTT switch.  
7. To DELETE a channel from the transceiver’s memory, hold down the  
SCAN key while the memorized channel is displayed. “MEM” is  
deleted.  
5.7 PRIORITY SCANNING  
Emergency channel 16 can be set as the priority channel for scanning  
by performing the following:  
1. Turn off the transceiver power.  
2. Press and hold the SCAN key and turn the power back on. A “p” will  
be shown to the left of “16” on the display to indicate that priority  
scan is enabled.  
NOTE  
To scan or priority scan, 2 or more channels must be memorized in  
scan memory. See section 5.6 in the Owner’s Manual.  
3. To start scanning, press the SCAN key. Scanning will proceed  
between the memorized channels and priority channel 16.  
4. For example, channels 06, 07, and 08 are memorized in the transceiver’s  
memory, priority scanning will proceed in the following sequence:  
Priority  
Channel  
16  
Priority  
Channel  
16  
Priority  
Channel  
16  
CH06  
CH07  
CH08  
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GX1250S  
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5. Even when the transceiver stops and listens to the signal of a  
memorized channel, the transceiver will DUAL WATCH between this  
channel and the priority channel.  
6. To disable priority scanning, turn off the transceiver power. Press  
and hold the SCAN key and turn the power back on. The “p” will  
disappear from the display to indicate that priority scan is disabled.  
5.8 WEATHER ALERT  
In the event of extreme weather disturbances such as storms and  
hurricanes, NOAA (National Oceanic and Atmospheric Administration)  
sends a weather alert accompanied by a 1050 Hz tone and subsequent  
weather reports on the weather channels. The transceiver is capable of  
receiving this alert if the following steps are performed:  
1. Program weather channels into the transceiver’s memory for  
scanning. Follow the same procedure as used for regular channels in  
Section 5.6.  
2. Press the SCAN key to start a scan.  
3. The programmed weather channels are scanned along with the  
regular programmed channels. However, the scan does not stop for  
normal weather broadcast.  
4. When an alert is received on a weather channel, scanning stops and  
the transceiver enters the WEATHER ALERT MODE.  
5. When the transceiver is in the WEATHER ALERT MODE, a loud  
tone is sounded.  
6. Press the WX key to stop the alert tone and receive the voice  
information on the weather channel.  
Owner's Manual  
Page 14  
GX1250S  
 
5.9 EMERGENCY CHANNEL 16  
1. To select the emergency channel, press the 16/9 key from any  
channel.  
2. Transmit your emergency signal in the same manner as on regular  
channels. If you can not contact anyone on channel 16, switch to  
another channel.  
3. See the OWNER’S MANUAL SUPPLEMENT for additional  
emergency operating practices.  
5.10 CHANNEL 9  
1. Channel 9 is used as a hailing channel for initial, non-emergency  
contact with other vessels. Hold down the 16/9 key to select channel  
9.  
5.11 OPERATING ON CHANNEL 13  
Channel 13 is used at docks, bridges and for maneuvering in port.  
Messages on this channel must concern navigation only, such as  
meeting and passing in restricted waters. Messages must be short and  
low power used.  
In emergencies and when approaching blind river bends, high power is  
allowed. Hold down the H/L key to temporarily switch to high power. Hi  
power can only be accessed in USA or Canadian modes  
.
5.12 OPERATING ON CHANNEL 67  
When channel 67 is used for navigational bridge-to-bridge traffic  
between ships, high power may be temporarily used in the USA mode,  
by holding down the H/L key.  
Owner's Manual  
GX1250S  
Page 15  
 
6
MAINTENANCE  
For preventive maintenance and instructions on obtaining factory service,  
please refer to the OWNER’S MANUAL SUPPLEMENT. For general  
troubleshooting, refer to the Troubleshooting Chart.  
TROUBLESHOOTING CHART  
REMEDY  
SYMPTOM  
PROBABLE  
CAUSE  
Check power cable for DC  
voltage or the replace the 6 A  
250 V fuse.  
Transceiver fails to  
power up.  
No DC voltage to  
the transceiver or a  
blown fuse.  
Be sure the RED wire is  
Transceiver blows fuse  
upon connection of the  
power supply.  
Reversed power  
connections.  
connected to POSITIVE battery  
terminal and BLACK wire to  
NEGATIVE terminal. If the  
transceiver still blows the fuse,  
contact your SCC Dealer.  
Reroute DC power cables away  
from engine. Add noise  
suppressor to the power cable.  
Change to resistive spark plug  
wires and/or add an alternator  
whine filter.  
Popping or whining  
noise from speaker while  
the engine runs.  
Engine noise.  
The external speaker jack  
External speaker plug  
does not fit into jack.  
Incorrect plug on  
speaker cable.  
accepts only RCA phono plugs  
.
Normal transceiver operation  
causes internal speaker cut-off  
when external speaker is  
plugged in.  
Internal speaker turns off  
when external speaker is  
plugged in.  
No problem.  
Channel mode.  
Antenna  
The transceiver may be tuned  
to a duplex channel meant for  
ship-to-shore radiotelephone  
communications.  
Transceiver transmits  
but does not receive.  
Have antenna checked or test  
the transceiver with another  
antenna. If problem persists,  
contact your SCC Dealer.  
Transceiver transmits on  
low power only.  
Owner's Manual  
Page 16  
GX1250S  
 
7
SPECIFICATIONS  
Performance specifications are nominal, unless otherwise indicated, and  
are subject to change without notice.  
7.1 GENERAL  
Frequency Range..............................................................156.050 to 163.275 MHz  
Channels...............................................................65 total: 55 marine + 10 weather  
Input Voltage ................................................................................13.8 VDC ± 20 %  
Current Drain:  
Standby ...............................................................................................0.5 A  
Receive ...............................................................................................1.5 A  
Transmit.........................................................................6 A (Hi); 1.7 A (Lo)  
Physical Characteristics................................................2.52” H x 5.91” W x 5.28” D  
(64 mm x 150 mm x 134 mm)  
1.68 Ib. (0.76 Kg)  
FCC Type Acceptance Number ................................................................APV0493  
DOC Type Approval Number.....................................................363822161LVCA  
7.2 TRANSMITTER  
RF Output...................................................................................25 W (Hi); 1W (Lo)  
Conducted Spurious Emissions.............................................65 dB (Hi); 50 dB (Lo)  
FM Hum and Noise .................................................................................40 dB min.  
Audio Response......................................within +2/-8 of 6 dB/octave pre-emphasis  
Audio Distortion..................................................................................................5 %  
Modulation........................................................................................................16F3  
Frequency Stability (-20° to +50°C)........................................................± 0.0005 %  
7.3 RECEIVER  
Sensitivity:  
20 dB Quieting...................................................................................0.4 µV  
12 dB SINAD...................................................................................0.35 µV  
Squelch Sensitivity (Threshold)......................................................................0.2 µV  
Bandwidth  
Acceptable Radio Frequency Displacement.................................± 4.5 kHz  
Selectivity:  
Spurious and Image Rejection ...........................................................70 dB  
Intermodulation and Rejection at 12 dB SINAD Sensitivity................65 dB  
Audio Output 5% Distortion................................................................................4 W  
Audio Response..........................................................within +2/-8 of a 6 dB/octave  
de-emphasis characteristic at 300 to 3000 Hz  
Frequency Stability (-20° to +50°C)..........................................................± 0.001 %  
Channel Spacing...........................................................................................25 kHz  
Owner's Manual  
GX1250S  
Page 17  
 
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Standard Communication Corp.  
P.O. Box 92151  
Los Angeles, CA 90009-2151  
Telephone 310/532-5300  
© STANDARD COMMUNICATIONS CORP. 1998  
All Rights Reserved  
Printed in Japan  
03/1999  
175B851012  
 

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