Standard Horizon Eclipes DSC GX1000S User manual

Page 1GX1000S
ECLIPSE DSC GX1000S
25 Watt VHF/FM
DSC Marine Transceiver
Owner's Manual
zAffordable Ultra Compact Fixed Mount VHF radio
zSubmersible IPX7 Front Panel
zSC-101 DSC (Digital Selective Calling) with Position Report and Request
zProgrammable Scan, Priority Scan, and Dual Watch
zSelectable Channel Names or GPS LAT / LON shownÚon display
zSimple Operation
zAll USA / International and Canadian Marine Channels
zNOAA Weather Channels with Weather Alert
ÚWhen Attached to GPS Receiver

GX1000SPage 2
TABLE OF CONTENTS
1 GENERAL INFORMATION ..................................................................................................... 4
2 PACKING LIST ....................................................................................................................... 4
3 OPTIONS ................................................................................................................................ 4
4 SAFETY / WARNING INFORMATION .................................................................................... 5
5 FCC RADIO LICENSE INFORMATION .................................................................................. 6
6 FCC NOTICE .......................................................................................................................... 7
7 GETTING STARTED ............................................................................................................... 8
7.1 ABOUT VHF RADIO .................................................................................................. 8
7.2 SELECTING AN ANTENNA ...................................................................................... 8
7.3 COAXIAL CABLE ....................................................................................................... 9
8 INSTALLATION ..................................................................................................................... 10
8.1 LOCATION ................................................................................................................. 10
8.2 ELECTRICAL CONNECTIONS ................................................................................ 10
8.3 ACCESSORY CABLE .............................................................................................. 12
8.4 CHECKING GPS CONNECTIONS ......................................................................... 13
8.5 CHANGING THE GPS TIME .................................................................................. 13
8.6 CHANGING THE TIME LOCATION ....................................................................... 14
8.7 OPTIONAL MMB-84 FLUSH MOUNT INSTALLATION ......................................... 15
9 CONTROLS AND INDICATORS ........................................................................................... 16
10 BASIC OPERATION ............................................................................................................. 20
10.1 RECEPTION .............................................................................................................. 20
10.2 TRANSMISSION ....................................................................................................... 20
10.3 TRANSMIT TIME-OUT TIMER (TOT) ..................................................................... 20
10.4 SIMPLEX / DUPLEX CHANNEL USE ..................................................................... 21
10.5 USA, CANADA, AND INTERNATIONAL MODE ..................................................... 21
10.6 NOAA WEATHER CHANNELS ............................................................................... 22
10.6.1 NOAA Weather Alert ................................................................................. 22
10.6.2 NOAA Weather Alert Testing ................................................................... 23
10.7 EMERGENCY (CHANNEL 16 USE) .......................................................................... 23
10.8 CALLING ANOTHER VESSEL (CHANNEL 16 OR 9) ............................................. 23
10.9 MAKING TELEPHONE CALLS ............................................................................... 24
10.10 OPERATING ON CHANNELS 13 AND 67 ........................................................... 24
10.11 SCANNING ................................................................................................................ 25
10.11.1 Selecting the Scan Type ............................................................................ 25
10.11.2 Memory Scanning (M-SCAN) .................................................................... 25
10.11.3 Priority Scanning (P-SCAN) ...................................................................... 26
Priority Channel Setting ...................................................................... 26
10.12 NAVIGATION INDICATION ....................................................................................... 27

Page 3GX1000S
11 DIGITAL SELECTIVE CALLING .......................................................................................... 28
11.1 GENERAL .................................................................................................................. 28
11.2 MARITIME MOBILE SERVICE IDENTITY (MMSI) ................................................... 29
11.2.1 What is an MMSI? ................................................................................... 29
11.2.2 Programming the MMSI ........................................................................... 29
11.3 DSC DISTRESS CALL ............................................................................................ 30
11.3.1 Transmitting a DSC Distress Call ............................................................ 30
11.3.2 Cancel a DSC Distress Call ................................................................... 31
11.3.3 Receiving a DSC Distress Call .............................................................. 31
11.4 ALL SHIPS CALL ..................................................................................................... 32
11.4.1 Transmitting an All Ships Call ................................................................ 32
11.4.2 Receiving an All Ships Call .................................................................... 33
11.5 INDIVIDUAL CALL .................................................................................................... 34
11.5.1 Setting up the Individual / Position Call Directory ................................. 34
11.5.2 Setting up Individual Reply ...................................................................... 35
11.5.3 Setting up Individual Call Ringer ............................................................ 35
11.5.4 Transmitting an Individual Call ................................................................ 36
11.5.5 Receiving an Individual Call .................................................................... 37
11.5.6 Setting Up the Individual Call Reply ........................................................... 37
11.6 POSITION REQUEST .............................................................................................. 38
11.6.1 Setting up Position Reply ........................................................................ 38
11.6.2 Transmitting a Position Request to Another Vessel ............................. 39
11.6.3 Receiving a Position Request ................................................................. 40
11.7 POSITION REPORT ................................................................................................. 41
11.7.1 Transmitting a DSC Position Report Call .............................................. 41
11.7.2 Receiving a DSC Position Report Call .................................................. 41
12 RADIO SETUP ...................................................................................................................... 42
12.1 LAMP ADJUSTING ................................................................................................... 42
12.2 LCD CONTRAST ...................................................................................................... 42
12.3 SCAN TYPE .............................................................................................................. 42
12.4 TIME OFFSET .......................................................................................................... 43
12.5 TIME LOCATION ....................................................................................................... 44
12.6 PRIORITY CHANNEL SET ...................................................................................... 44
12.7 KEY BEEP (ON/OFF) .............................................................................................. 45
12.8 WX ALERT ................................................................................................................ 45
13 MAINTENANCE .................................................................................................................... 46
13.1 REPLACEMENT PARTS .......................................................................................... 46
13.2 FACTORY SERVICE ................................................................................................ 47
13.3 TROUBLESHOOTING CHART ................................................................................ 47
14 CHANNEL ASSIGNMENTS .................................................................................................. 48
15 WARRANTY .......................................................................................................................... 54
16 SPECIFICATIONS ................................................................................................................. 57
TABLE OF CONTENTS

GX1000SPage 4
1 GENERAL INFORMATION
The Vertex Standard GX1000S ECLIPSE DSC is a VHF/FM transceiver de-
signed for use in the frequency range of 156.025 to 163.275 MHz. The GX1000S
ECLIPSE DSC can be operated from 11 to 16 VDC and has a switchable RF
output power of 1 watt or 25 watts.
The GX1000S ECLIPSE DSC is capable of RTCM SC101 DSC (Digital Selec-
tive Calling) operation.
The GX1000S ECLIPSE DSC operates on all currently-allocated marine chan-
nels which are switchable for use with either USA, International, or Canadian
regulations. It has an emergency channel 16 which can be immediately se-
lected from any channel by pressing the red [16/9]key. NOAA Weather chan-
nels can also be accessed immediately by pressing the [WX]key.
Other features of the transceiver include: scanning, priority scanning, sub-
mersible mic, high and low voltage warning, and GPS repeatability.
2 PACKING LIST
When the package containing the transceiver is first opened, please check it
for the following contents:
yGX1000S ECLIPSE DSC Transceiver with microphone
yMounting Bracket and hardware
yOwner’s Manual
yPower Cord
3 OPTIONS
MMB-84 ......................................................................... Flush-Mount Bracket
MLS-310 .............................................................. Amplified External Speaker
MLS-300 ...................................................................... External Loudspeaker
101W ......................................................................... White External Speaker

Page 5GX1000S
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 condi-
tions of its passengers and bystanders by maintaining the minimum separa-
tion distance of 0.6 m (2 feet).
Failure to observe these restrictions will result in exceeding the FCC RF expo-
sure limits.
Antenna Installation:
The antenna must be located at least 0.6 m (2 feet) away from passengers in
order to comply with the FCC RF exposure requirements.
ON-LINE WARRANTY REGISTRATION
Please visit www.standardhorizon.com to register the GX1000S Marine
VHF. It should be noted that visiting the Web site from time to time may
be beneficial to you, as new products are released they will appear on
the Marine Division of Vertex Standard Web site.
PRODUCT SUPPORT INQUIRIES
If you have any questions or comments regarding the use of the
GX1000S, you can visit the Marine Division of Vertex Standard Web site
to send an E-Mail ([email protected]) or contact the Product
Support team at 800-767-2450 M-F 7:00-5:00PST.

GX1000SPage 6
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 (except Hawaii) which is under 20 meters in length. However, any
vessel required 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 station license. FCC license forms, including applications for ship
(506) and land station licenses can be downloaded via the Internet at
www.fcc.gov/forms. To obtain a form from the FCC, call [phone].
RADIO CALL SIGN
Currently the FCC does not require recreational boaters to have a Ship Radio
Station License. The USCG recommends the boats registration number and
the state to be used.
CANADIAN SHIP STATION LICENSING
You may need a license when traveling in Canada. If you do need a license
contact their nearest field office or regional office or write:
Industry Canada
Radio Regulatory Branch
Attn: DOSP
300 Slater Street
Ottawa, Ontario
Canada, KIA 0C8
FCC / INDUSTRY CANADA INFORMATION
The following data pertaining to the transceiver is necessary to fill out the li-
cense application.
Type Acceptance ......................................................................... FCC Part 80
Output Power ............................................... 1 Watt (low) and 25 Watts (high)
Emission ......................................................................... 16K0G3E, 16K0G2B
Frequency Range .................................................... 156.025 to 163.275 MHz
FCC Type Number ................................................................... K6630303X3S
Industry Canada Type Approval ............................................ 511B-30303X3S

Page 7GX1000S
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 Marine Division of Vertex Standard.
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 radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to ra-
dio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be de-
termined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.

GX1000SPage 8
7 GETTING STARTED
7.1 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 ma-
rine 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 radio transmission expected distances can be greater than 15 miles.
7.2 SELECTING AN ANTENNA
Marine antennas are made to radiate signals equally in all horizontal direc-
tions, but not straight up. The objective of a marine antenna is to enhance the
signal toward the horizon. The degree to which this is accomplished is called
the antenna’s gain. It is measured in decibels (dB) and is one of the major
factors in choosing an antenna. In terms of effective radiated power (ERP),
antennas are rated on the basis of how much gain they have over a theoretical
antenna with zero gain. A 3 foot, 3dB gain antenna represents twice as much
gain over the imaginary antenna.
Typically a 3 foot 3dB gain stainless steel whip is used on a sailboat mast. The
longer 8 foot 6dB fiberglass whip is primarily used on power boats that require
the additional gain.

Page 9GX1000S
7.3 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 should be
used for cable runs over 50 feet RG213 should be used. For installation of the
connector onto the coaxial cable refer to the figure below.
To get your coax cable through a fitting and into your boat’s interior, you
may have to cut off the end plug and reattach it later. You can do this if
you follow the directions that come with the connector. Be sure to make
good soldered connections.
1/16''
3/4''
3/4''
1 1/8''
1/8''
5/8''3/8''
Adapter

GX1000SPage 10
8 INSTALLATION
8.1 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 de-
sired 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.
8.2 ELECTRICAL CONNECTIONS
CAUTION
Reverse polarity connections will damage the radio!
Connect the power cord and antenna to the radio. Antenna and Power Supply
connections are as follows (see Figure 1):
Figure 1. General Installation
GPS Navigation Receiver
Accessory Cable
Optional Speaker
Antenna
Fuse
Red
Power Source
Black
Water proof
Deck Outlet

Page 11GX1000S
1. Mount the antenna at least 3 feet away from the radio. At the rear of the
radio, connect the antenna cable.
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 next section
for connections.
4. It is advisable to have a Certified Marine Technician check the power out-
put and the standing wave ratio of the antenna after installation.
Fuse Replacement
To take out the Fuse from the Fuse Holder, hold
the both ends of the Fuse Holder and pull the Fuse
Holder apart, do not bend the Fuse Holder. When
you replace the Fuse, please confirm that the Fuse
use is tightly fixed on the metal contact located
inside the Fuse Holder. If the metal contact hold-
ing the fuse is loose, the Fuse holder may heat
up.

GX1000SPage 12
8.3 ACCESSORY CABLE
Wire Color/Description
WHITE - External Speaker (+)
SHIELD - External Speaker (–)
BLUE- NMEA Input (+)
GREEN - NMEA ground (–)
PURPLE- NMEA Output (+)
Connection Examples
Connect to external 4 Ohm audio speaker
Connect to external 4 Ohm audio speaker
Connect to NMEA (+) output of GPS
Connect to NMEA (–) ground of GPS
Connect to NMEA (+)input of GPS
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 using proper waterproofing techniques.
• 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 contact
the manufacturer of the GPS receiver.
•GX1000S can read NMEA-0183 version 2.0 or higher.
• The NMEA supported sentences are:
Input: GLL, GGA, RMC and GNS (RMC sentence is recommended)
Output:DSC and DSE
(DSC sentences to Standard Horizon Plotter for Position Polling)
If you have further inquires, please feel free to contact Product Support at:
Phone: [phone]
Email: [e-mail]
GPS Receiver
PA Speaker
Green
Purple NMEA OUT
NMEA OUT
NMEA IN
( )
( )
( )
Blue
Shield
White

Page 13GX1000S
8.4 CHECKING GPS CONNECTIONS
After connections have been made between the GX1000S and the GPS, a
small satellite icon ( ) will appear on the LCD display. To
see the additional GPS information, press and hold the [H/L]
key. The GX1000S displays “LAT” and “LON” information al-
ternately every two seconds.
NOTE
If the GPS looses a fix or has a problem the Satellite icon ( ) will blink.
8.5 CHANGING THE GPS TIME
From the Factory the GX1000S shows GPS satellite time or UTC time. A time
offset is needed to show the local time in your area.
1. Press and hold down the [CALL(SET)MENU]key until
“RADIO SETUPRADIO SETUP
RADIO SETUPRADIO SETUP
RADIO SETUP” menu appears.
2. Press the [CALL(SET)MENU]key, then select “OFFSETOFFSET
OFFSETOFFSET
OFFSET
TIMETIME
TIMETIME
TIME” with the [T]/[S]keys.
3. Press the [CALL(SET)MENU]key.
4. Press the [T]/[S]keys to select time offset from UTC.
See illustration below to find your offset time from UTC. If
“0:000:00
0:000:00
0:00” is assigned, the time is the same as UTC (Univer-
sal Time Coordinated or GMT Greenwich Mean Time).
5. Press the [CALL(SET)MENU]key to store the time offset.
6. Press the [16/9]key to exit the menu mode and return to
radio operation.
OFFSET TIME TABLE

GX1000SPage 14
8.6 CHANGING THE TIME LOCATION
Sets the radio to show UTC time or local time with the offset input in section
“8.5 CHANGING THE GPS TIME”.
1. Press and hold down the [CALL(SET)MENU]key until
“RADIO SETUPRADIO SETUP
RADIO SETUPRADIO SETUP
RADIO SETUP” menu appears.
2. Press the [CALL(SET)MENU]key, then select “TIME DISPTIME DISP
TIME DISPTIME DISP
TIME DISP”
in the “RADIO SETUPRADIO SETUP
RADIO SETUPRADIO SETUP
RADIO SETUP” menu with the [T]/[S]keys.
3. Press the [CALL(SET)MENU]key.
4. Press the [T]/[S]keys to select “UTCUTC
UTCUTC
UTC” or “LOCALLOCAL
LOCALLOCAL
LOCAL.”
5. Press the [CALL(SET)MENU]key to store the selected
setting.
6. Press the [16/9]key to exit the menu mode and return to
radio operation.

Page 15GX1000S
8.7 OPTIONAL MMB-84 FLUSH MOUNT INSTALLATION
1. To assist in flush mounting, a template has been included. Use this tem-
plate to find the mounting location.
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 accom-
modate the transceiver (at least 6.7 inches or 17 cm deep).
There should be at least 1/2 inch (1.3 cm) 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 Installation
Bracket
Adjusting Screw
Lock-washer nut combination

GX1000SPage 16
9 CONTROLS AND INDICATORS
NOTE
This section defines each control of the transceiver. See Figure 3 for
location of controls. For detailed operating instructions refer to section
“10 BASIC OPERATION.”
POWER SWITCH / VOLUME CONTROL (VOL)
Turns the transceiver on and off as well as adjusts the speakers audio
volume.
Turn this knob clockwise to turn the radio on and to increase the speakers
audio volume level.
Turn fully counter-clockwise to turn the radio off.
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.
[H/L]Key
Press this key to toggle the transmit output power 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 temporarily 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.
NOTE: 1W low power is indicated by LO on the display, when 25W high
power is selected the display does not show an indication.
Secondary use
Press and hold this key, the LCD displays NAV GPS Time and vessel’s
position (LAT/LON) when a GPS is connected to the accessory cable of
the GX1000S. See section “8.3 ACCESSORY CABLE” for details.
[WX]Key
Immediately recalls the previously selected NOAA weather channel from
any channel.
Secondary use
Holding down the [16/9]key while pressing the [WX]key changes from
USA, International and Canadian channel groups.

Page 17GX1000S
Figure 3. Controls and Connectors

GX1000SPage 18
[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 the Chan-
nel Group.
KEYPAD
[S]/[T]Keys
The [S]and [T]keys are used to select a desired channel and to
select items in the DSC OPERATION and SETUP menus.
[SCAN(MEM)] Key
Press this key to start and stop the scanning of programmed channels.
Refer to section “10.11 SCANNING” for details.
Secondary use
To program a channel into scan memory, select the channel and press
and hold the [SCAN(MEM)] key until “MEM” is shown on the display.
To delete a memorized channel from scan memory, select the channel
and press and hold the [SCAN(MEM)] key until “MEM” is removed
from the display.
[CALL(SET)MENU]Key
Press the [CALL(SET)MENU]key to access the DSC OPERATION
menu. The “INDIVIDUAL CALLINDIVIDUAL CALL
INDIVIDUAL CALLINDIVIDUAL CALL
INDIVIDUAL CALL,” “GROUP CALLGROUP CALL
GROUP CALLGROUP CALL
GROUP CALL,” and “ALL SHIPS CALLALL SHIPS CALL
ALL SHIPS CALLALL SHIPS CALL
ALL SHIPS CALL”
functions can be accessed from the DSC OPERATION menu.
NOTE: Before the DSC OPERATION menu can be selected an MMSI
must be entered. Refer to section “11.2 MARITIME MOBILE SER-
VICE IDENTITY (MMSI).”
Secondary use
Press and hold the [CALL(SET)MENU]key to access the “RADIORADIO
RADIORADIO
RADIO
SETUPSETUP
SETUPSETUP
SETUP” (refer to section “12 RADIO SETUP MODE”) or “DSC SETUPDSC SETUP
DSC SETUPDSC SETUP
DSC SETUP”
menu (refer to section “11 DIGITAL SELECTIVE CALLING”).
[DISTRESS]Key
Used to send a DSC Distress Call. To send the distress call refer to section
“11.3.1 (Transmitting A DSC Distress Call).”
DC INPUT CABLE
Connects the radio to a DC power supply capable of delivering 12V DC.

Page 19GX1000S
EXTERNAL SPEAKER CONNECTION CABLE
Connects the GX1000S to a external speaker.
GPS RECEIVER CONNECTION CABLE
Connects the GX1000S to a GPS receiver.
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 when the transceiver is in radio mode.
MICROPHONE
Transmits the voice message with reduction of background noise, using
Clear Voice Noise Reduction Technology.
NOTE: Be sure your mouth is about 1/2 inch (1 cm) from the mic hole for
best performance.

GX1000SPage 20
10 BASIC OPERATION
10.1 RECEPTION
1. After the transceiver has been installed, ensure that the power supply and
antenna are properly connected.
2. Turn the VOL knob clockwise to turn on the radio.
3. Turn the SQL knob fully counterclockwise. This state is known as “squelch off”.
4. Turn up the VOL knob until noise or audio from the speaker is at a comfort-
able level.
5. Turn the SQL knob clockwise until the random noise disappears. This state
is known as the “Squelch Threshold”.
6. Press the [S]or [T]key to select the desired channel. Refer to the chan-
nel chart on page 48 for available channels.
7. When a message is received, adjust the VOL knob to the desired listening
level. The “ ” indicator in the LCD is displayed indicating that the
channel is being used.
10.2 TRANSMISSION
1. Perform steps 1 through 6 of RECEPTION.
2. Before transmitting, monitor the channel to ensure it is clear.
THIS IS AN FCC REQUIREMENT!
3 Press the PTT (push-to-talk) switch. The “ ” indicator in the LCD is dis-
played.
4. Speak slowly and clearly into the microphone.
5. When the transmission is finished, release the PTT switch.
NOTE
This is a noise-canceling microphone. The oval slot on the bottom of
microphone should be positioned within 1/2 inch (1.3 cm) from the mouth
for optimum performance.
10.3 TRANSMIT TIME - OUT TIMER (TOT)
When the PTT switch on the microphone is held down, transmit time is limited to
5 minutes. This limits unintentional transmissions due to a stuck microphone.
About 10 seconds before automatic transmitter shutdown, a warning beep will be
heard from the speaker(s). The transceiver will automatically go to receive mode,
even if the PTT switch is continually held down. Before transmitting again, the
PTT switch must first be released and then pressed again.