Shakespeare Electronic SE 2500/S User guide

SE 2500/S
MARINE VHP RADIO

TABLE OF CONTENTS
1.0 Introduction.1
1.1 Purpose.1
1.2 Equipment Description.2
1.3 Brief Operating
Instructions.2
1.4 Technical Specifications.4
1.5 Supplied Parts List.5
1.6 Optional Accessories.5
1.7 License Requirements.5
1.7.1 License Application.6
1.7.2 Operator’s License.6
2.0 Installation.
2.1 Unpacking And Inspection.7
2.2 Mounting Preparation.7
2.3 Mounting Location
Selection.7
2.4 Front Panel Reversal.8
2.5 Unit Mechanical Installation.. 9
2.6 Electrical Connectioas.9
2.6. i Power Hookup.10
2.6.2 Antenna Connection.10
2.6.3 Coax Connector Assembly....! 1
2.6.4 External Speaker
Connection.12
3.0 Operation. 13
3.1 Controls And Display..13
3.2 Operating Procedures.14
3.2.1 Power and Volume
Control.14
3.2.2 Display Backlighting.14
3.2.3 Setting Squelch.14
3.2.4 Channel Selection.14
3.2.5 USA/lnfernational Channel
Select.15
3.2.6 Voice Transmitting.15
3.2.7 Hi^/Low Transmit Power.... 16
3.2.8 Transmitter 3 Minute
Time Out.16
3.2.9 Weather Channels Access.16
3.2.10 Channel 16 Priority.16
3.2.11 Chaiinen3/67 High Power
Override .17
3.2.12 Dual Watch. 17
3.2.13 External Speaker..17
3.3 Method.? Of Operation.17
4.0 Appendix.18
Appendix A.IS
USA VHF Marine Channel
Assignments
Appendix B.19
VHF Marine Weather Channel
Assignments
Appendix C. 1 9
Itttcmational VHF Marine
Channel Assignments
Appendix D..20
Canadian VHF Marine Channel
Assignments
Appendix E.....22
Phonetic Alphabet And Glossary
Appendix F..23
Schematics

Figure 1-1 Shakespeare SE 2500 Marine VHF Radio.
1.0 IMTRODUCnON
Welcome and congratulations on your purchase of the Shakespeare SE 2500 Marine
VHF radio. You have purchased a high technology piece of marine electronics, fully
backed by the Shakespeare name. The Shakespeare SE 2500 Marine VHF radio
incorporates modern styling and functionality, making the Shakespeare SE 2500 not
only easy, but pleasing to operate.
The frequency synthesized transceiver provides access to ALL usable U.S. and
International Channels. Ten weather channels are also available through easy front
panel key presses making the SE 2500 the best value in marine VHF radio.
The key to obtaining the most use and pleasure from your new VHF radio, is reading
the owner’s manual. This manual teaches you poper transceiver procedures and care
to ensure many years of satisfying use. It is especially important to cover the areas of
this manual pertaining to "License Requirements" established by the Federal Com¬
munications Commission.
1.1 Purpose
The Shakespeare SE 2500 Owner’s Manual is designed to answer your questions about
the installation and operation of your radio. It is important to read through each section
before attempting to install oroper^e yourradio. A "Brief Operating" section assures
you are on the air quickly and properly. Many new user pitfalls can be avoided by
reading this manual.
1

1.2 Equipment Description
The Sliakespeare SE 2500 Marine VHP radio is a digitally synthesized transceiver
constructed of only the highest grade materials. All electronic components are solid
state providing the most efficient use of electrical power. The Shakespeare 2500
VHP radio offers two output settings, 1 watt and 25 watts. The microprocessor
control used in this radio offers features found only in far more expensive units.
Features such as Dual Channel Watch. Priority Channel 16, and 10 Weather
Channels are only some of the Shakespeare SE 2500’s many extras.
1.3 Brief Operating Instructions
U.SC the following brief operation instructions to quickly refresh your memory when
using the Shakespeare SE 2500 Marine VHP radio. Please remember that this section
is not designed to replace a thorough study of the Owner’s Manual.
1- Channel 16 select key
2- Power and Volume control
3- Squelch Control
4- Dual Watch active indicator
5- Weather Channel indicator
6- Lo Power Output indicator
7- Transmit active indicator
8- Hi Output power indicator
9- Intemational channel indcator
10- USA channel indicator
11- Active channel readout
12- Speaker
13- Dual Watch select key
14- Microphone cable
15- WeathCT mode select key
16- HI/LO transmit power key
17- USA/Internatioiial channel key
18- Down channel select key
19- Up channel select key
2

1.2 Equipment Description
The Shakespeare SE 2500 Marine VHP radio is a digitally synthesized transceiver
constructed of only the highest grade materials. AH electronic components are solid
state providing the most efficient use of electrical power. The Shakespeare 2500
VHP radio offers two output settings, i watt and 25 watts. The microprocessor
control used in this radio offers features found only in far more expensive units.
Features such as Dual Channel Watch, Priority Channel 16, and 10 Weather
Channels are only some of the Shakespeare SE 2500’s many extras.
1.3 Brief Operating Instructions
Use the following brief operation instractitxis to quickly refresh your memory when
using the Shakespeare SE 2500 Marine VHP radio. Please remember that this section
is not designed to replace a thorough study of the Owner’s Manual.
1 2 3 4 5 6 7 J J 10 11 12
13 14 15 16 17 18 19
1- Channel 16 select key
2- Power and Volume control
3- Sque!ch Control
4- Dual Watch active indicator
5- Weather Channel indicator
6- Lo Power Output indicator
7- Transmit active indicator
8- Hi Output power indicator
9- Intemational channel indcator
10- USA channel indicator
11- ActLve channel readout
12- Speaker
13- Dual Wateh select key
14- Microphone cable
15- Weather mode select key
16- HI/LO transmit power key
17- USA/International channel key
IS-Down channel select key
19-Up channel select key
2

POWER ON
VOLUME
SQUELCH
BACKLIGHT
USA/INT
SELECTING
CHANNELS
EMERGENCY
CALLING
TRANSMIT POWER
TRANSMIT
WEATHER
CHANNELS
DUAL WATCH
BRIEF OPERATIONS TABLE
Turn Volume Control CLOCKWISE.
Adjust Volume Control to desired setting.
Turn Squelch Control knob counterclockwise until noise
is heard. Turn Squelch Control knob clockwise slowly,
Just until noise is no longer heard.
The backlighting is on all the lime.
This key changes the available channels to USA or
International allocations. See Appendix A through D
for complete channel listing and usage.
Pressing the lUP/DOWl^ arrow keys on the front
panel, or the front of the microphone.scrolis through
the available channels. The displayed channel is the
active channel.
Press [I 3 key for channel 16. This channel is used
to call the Coast Guard and general vessel calling.
Always switch to another channel to chat.
To leave Emergency-Calling Channel 16 press |DW
WX|, or Channel Select lUP/DOW'N] arrows keys,
Press iHI/LOl to toggle between 1 and 25 watts.
Press and hold die PUSH-TO-TALK
key on the top of the microphone to transmit.
Press 1WX| to access the last selected weather channel.
To change Weather Qiannels use the
arrow keys.
UP/DOWN
To exit the weather channels press |16| or | WX
Set Squelch, then select a channel other than Channel 16.
Press the key. To stop, press |161 or | WX | .
NOTE
1 beep confirms a valid entry or selection.
3 beeps mean an invalid entry-PLEASE TRY AGAIN.
3

1.4 Technical Specifications
General
Physical Characteristics
Temperature Range
Power Requirements
Channels
Transmitter
Output Power
Output Impedance
Modulation
Frequency Stability
Spurious Emissions
Hum and Noise
Audio response
Receiver
Sensitivity
Selectivity
Spurious Response
Attenuation
Intermodulation Spurious
Response Attenuation
Audio Output Power
Audio Distortion
Audio Response
Squelch Sensitivity
Height 2.5'
Width: 6.0"
E>epth: 8.0" including heat sink
Weight 2.0 lbs.
-20 Deg C Id +50 Deg C
13.8 VDC nominal, 5.5 A transmit, .2 A receive
124 total, 57 USA, 57 International and
10 Weather
25 Wall/I Wan
50 Ohms
FM. 5 KHz max deviation
+/-.0005%{5ppm)
2.5uW(.56db)@ I WattTx
25uW(.70db) @25 WattTx
-40 db
Less than 10% distortion at 3khz deviation.
6db/octave pre-emphasis. Audio low pass
filter included.
.25uV or less for 12db SINAD
.50uV or less for 20db SINAD
-6dbat7.5 KHz
-65dbat25KHz
70db min.
70db min.
3 Watts @ 8 Ohms
6 Walls @ 4 Ohms External
10% @ 3 Watts into 8 Ohms
+1/-3 db matching a 6db/octave de-emphasis
from 300-3000HZ
Threshold: .30 uV Max,
Full Squelch: .80 uV
Specifications are subject to change without notice and are nominal unless other¬
wise indicated.
4

1.5 S upplied Parts
SE 2500 Radio Transceiver
Plastic Mike Clip with screws
Special Waterproof Mike
Spare 7 Amp fuse
Mounting Knobs
Mounting Bracket
Power Cable Assembly with fuse holder
Owner’s Manual
Waterproof Brief Instruction Card
FCC Applicalion-506
FCC Restricted Operator’s Permit-753
Warranty Card
1.6 Optional Accessories
Flush Mount Installation Kit
Reverse Panel Gasket
Be sure to consult your marine electronics dealer for a Shakespeare antenna that best
suits your particular installation. Shakespeare has been building a reputation for
uncompromising quality in marine communications for more than 35 years. A
reputation that our US Navy and Coast Guard have come to count on. So whether you
selected your Shakespeare radio for peace of mind or for fun, we recommend you
consult your Shakespeare marine electronics dealer for the wide variety of marine
antennas and accessories available. He can help you select the system combination
that best fits your boat and needs.
1.7 License Requirements
Pleasure boats (U.S. vessels), equipped with a marine radio, must have a Ship Station
License. Other vessels (including compulsory equipped vessels) may require a Ship
Radio Station License and a Commercial Radio Operator's License to operate the radio
station. If the ship is not a U.S. vessel, contact the local authorities to determine
licensing requirements.
When purchasing a new boat, a new station license must be applied for as the "Ship
Station License" is not transferable. Therefore, upon the sale of your boat, the FCC
requires that you submit your old license for cancellation.
5

A change in mailing address requires notification to be filed with the FCC. This
notification is mailed to; .
Federal Communications Commissicm
P. O. Box 1040
Gettysburg, PA 17326
1.7.1 License Application
The Ship Radio Station License is obtained by filling out and submitting Form 506
with $35 to the FCC. DO NOT SEND CASH. To (^rate the radio while waiting for
the license to be returned from the FCC, fiU out and keqj the bottom part of Form 506.
This "Temporary Permit" is good for 90 days fixrm the date the Form 506 is mailed to
the FCC. Your Ship Station License is valid for a period of 5 years. The call sign for
your station will be issued on the license and the temporary permit has instructions for
assigning the vessel’s temporary call sign.
If the ship’s radio station is to be operated in other countries, contact the local
authorities for their licensing requirements.
Mail Station License Application form to:
Federal Communications Commission
Marine Ship Service
P. O. Box 358275
Pittsburgh. PA 15251-5275
1.7.2 Operator’s License
A Commercial Radio Operator’s License is generally not required to operate a ship’s
radio station aboard a pleasure boat. A Restricted Radiotelephone Operator Permit is
not required for domestic operation of a marine VHF radio for U.S. pleasure boats as
long as you do not dock in any foreign ports, ff you are going to dock in a foreign port
or plan to leave a foreign port to dock in U.S. ports, it will be necessary to obtain the
Restricted Permit. To do this fill out and mail to ttie FCG a Form 753 along with a $35
fee in the form of a single check or money Older payable to the FCC. DO NOT SEND
CASH. For further license informaticm call die FCC at 717-337-1212.
6

2.0 INSTALLATION
Before using the Shakespeare SE 2500 Marine VHP r^io, please study the following
section. Failure to adhere to the these installation and operating considerations can
damage or significantly degrade the perfoimance of your VHP radio.
2.1 Unpacking And Inspection
The Shakespeare SE 2500 Marine VHP radio comes to you 100% inspected. When
unpacking, check the parts shipped with the unit against the supplied parts list. If there
is a discrepancy, notify your selling agent or Shakespeare Customer Service. (1 -803-
276-5504)
If the radio was damaged during shipment, save ALL packing material to make it easier
to file a claim with the carrier. All damage claims from shipment must be filed with
the freight carrier used to ship the radio to you.
2.2 .Mounting Preparation
Before actually mounting your new SE 2500 Marine VHP radio, take a little time to
read over the installation instructions. You will find there are many things to take into
consideration before drilling that first hole. Planning every aspect of the installation
first, will save time and aggravation. It will also save money by cutting down potential
errors that require repair to correct.
Before mounting begins you will need to purchase a marine VHP radio antenna.
Shakespeare markets a full line of high quality marine VHP radio antennas to fit every
installation. The dealer you purchased this radio from will be able to help you choose
the antenna style best suited to your type of boating.
2.3 Mounting Location Selection
The following is a list of items that need advanced planning before selection of the
mounting location.
1. Find where the vessel’s +12 volt supply and ground are located and what it will
take to get the radio power cable assembly to it.
2. Where can the antenna be mounted and what must be done to route the antenna
cable to the radio?
NOTE
Keep the antenna at least 3 feet away from the radio and as high as possible for best
performance.
7

3. Where is the best place to mount the radio itself? Keep in mind that the radio may
be table top mounted, hang mounted overhead, bulkhead mounted vertically, under
counter mounted and flush mounted using the optional Flush Mount Kit.
4. When deciding on a mounting location, visibility of the front panel, access to the
front panel controls, access to the mounting knobs, room for rear cable connections
and access to rear cable connections must be addressed and planned.
Figure 2>1 Screws to remove for front panel reversal.
2.4 Front Panel Reversal
For overhead and bulkhead Installations follow these instructions to reverse the front
panel. Do this before mounting the radio.
1. Disconnect all connections from the back of the radio. Then remove the four screws
on the back of the unit securing the case to the chassis.
2. Slide the case off of the radio and replace the original front panel gasket with the
reverse front panel gasket.
3. Rotate the case 180 degrees.
4. Tilt the display forward 40 de^es.
5. Slide the case back on the chassis. Do not pinch any wiring or cabling.
6. Seat the case on the front panel and re-install the screws on the back of the radio.
Do not over torque the screws.
7. Mount the trunnion bracket on the top of the radio. Figure 2-2 shows the "before"
and "after" results.
8

Figure 2-2. Front Panel Reversal procedure.
2.5 Unit Mechanical Installation
Once a mounting location has been chosen, hold the mounting bracket at the place
where the-unit is to be mounted. Use the mounting bracket as a template to mark the
places to drill holes for the mounting screws.
To mount the bracket to wood use stainless steel wood screws. If the unit is to be
mounted on fiberglass, use stainless steel nuts and through bolts as the vibrations found
on most pleasure boats will loosen self tapping screws mounted directly into fiberglass,
When the mounting bracket is secured, attach the SE 2300 to the bracket using the
mounting knobs supplied with the unit. For overhead and bulkhead installations
reverse the front panel.
2.6 Electrical Connections
The back panel of the SE 2500 comes with die following standard connections.
1. Electrical Power (4-12 volts)
2. Antenna Connector (for PL-259 type connections)
3. External speaker (1/8 " phono plug recqitacle)
9

EXTERNAL SPEAKER CONNECTOR
Figure 2-3 Rear panel electrical connections.
2.6.1 Power Hookup
The SB 2500 is supplied with a power cable assembly. The free end of the cable is
connected to the battery side of the vessel’s +12 volt power buss. The cable is
equipped with a 7 Amp in-line fuse holder for over-current protection. The Red (+)
side is connected to a +12 volt buss. The Black (-) side of the cable is connected to
the Negative or Ground side of the ship’s power. After the power cable is connected
to the ship's power, plug the connector end into the back of the radio.
NOTE
Use at least 12 gauge wire to carry the transmit 5.5 Amp current. This wire size is
appropriate for up to 20 feet of cable length.
When powering up the SE 2500, if no display appears once the power is turned on,
check the power cable hookup polarity if the in-line fuse is blown. Remember to
replace the fuse with one of the same 7 Amp rating. Using a fuse with a higher rating
can result in permanent damage to the radio.
2.6.2 Antenna Connection
DO NOT attempt to operate the SE 2500 without the antenna connected, to do so can
result in severe damage to the transmitter portion of the radio and void the warranty.
Plug the antenna cable PL-259 connector into the antenna connector on the rear panel
of the SE 2500 Marine VHP radio. ALWAYS, screw down the outer coupling ring
of the connector to ensure a solid connection.
10

STEP 1
STEP 6B
CTCQ ^ L ^
COUPLING PL-259
RING
STEP S
BRAID
Figure 2-4. Coax Connector Assembly.
2.6.3 Coax Connector Assembly
1. Trim back outerjacket of coax back 1-1/8”.
2. Trim back the braided shield, 13/16''
3. Trim back center insuiation 3/4"
4. Siip coupling ring over cable.
5. Insert cable through the middle of the UG-175U adapter.
6. Fold the braided shield back over the end of the UG- 175U adapter. Be sure there
are no shield wires touching the center conductor.
7. Screw the UG-175U adapter into the PL-259 connector while feeding the end of
the center conductor of the cable through the hole at the end of the plug.
8. SolderthecenterconductorofthecoaxtolhecenterofthePL-259connector. Trim
center conductor. Solder braided shield to the PL-259 connector via the small holes.
9. Screw coupling ring onto the PL-259 cainector.
NOTE
If you are not sure about this procedure, have a qualified marine radio service
technician assist you.
11

2.6.4 External Speaker Connection
In high noise areas it is often desirable to install a more powerful external speaker.
Purchasing and mounting of the speaker is left to the discretion of the owner as
there is a great variety of external speakers available, but be sure a model capable of
8 Watts is purchased. We recommend a watertight model for long service.
Obtain a 1/8" phono plug from your local electronics supply house. To connect the
external speaker, solder the two leads from the speaker to the connections on a 1/8"
phono plug. Next, plug the phono plugintotheextemalspeakerconnectoron the back
of the radio.
After installation is complete, use the external speaker as you would the internal
speaker.
12

Figure 3-1. SE 2500 Front Control Panel.
3,0 OPERATION
The Shakespeare 2500 Marine VHF radio was designed for the tough marine environ¬
ment, with special attention paid to ease of operation. TTie following section helps you
realize the maximum benefit of your purchase. The SE 2500 marine VHF radio is not
only a communications convenience, but a valuable tool in life threatening situations.
This life saving potential makes thorough study of this Owner’s manual extremely
important.
3.1 Controls And Display
All controls and displayed information can be found on the front panel oftheSE2500.
Two knobs on the front panel control power ON/speaker volume and squelch adjust¬
ment. The red backlit LCD display shows selected channel, transmit power setting,
dual watch mode and transmit mode. The tactile keypad, with individual switches
behind the overlay, controls selection of receive and transmit channels, transmit power
level, dual channel watch, weather channels, USA or International channels and instant
channel 16 priority select. A singlebeepof die radio indicates a valid keyboard entry.
Three beeps means an invalid entry- PLEASE TRY AGAIN,
IS

3.2 O perating Procedures
3.2.1 Power and Volume Control
To apply power to the SE 2500 VHP radio, turn die Volume Control knob (front left
control knob), clockwise. A “click” is heard and felt At this point the display shows
numbers and annunciators. The SE 2500 remembers the last channel and mode you
VOLUME using before “TURN OFF” and goes to this same con¬
figuration at "TURN ON”.
The next thing to do is adjust the Squelch (see below). To do
this, turn the Squelch Control knob counterclockwise until
static is heard in the speaker. Now, the volume of the speaker
can be adjusted to a reasonable level by the Volume Control. Make this adjustment
by turning the volume control back and forth until you are comfortable with the
background Noise level.
3.2.2 Display Backlighting
The backlighting of the display comes on when the SE 2500 is powered up and stays
on for the entire time period that the radio is on. There is no brightness adjustment,
3.2.3 Setting Squelch
To adjust the squelch setting, start by turning the Squelch Control knob (front right
control knob), all Che way counterclockwise. Rotate the Volume Control knob until
the static noise heard in the radio speaker is at a comfortable
level. Next, when no radio transmissions are being heard, turn
the Squelch control knob clockwise just to the point that the
static noise is no longer heard. This quiets the static between
received radio transmissions and still allows the incoming mes¬
sages to be heard.
The level of squelch adjustment needed to quiet the radio static noise is dependent on
the background static intensity. Keep in mind that the squelch may need to be adjusted
when listening to a different channel.
SQUELCH
3.2.4 C hannel Selection
CHANNEL SELECT KEYS
Channel selection for the normal trans¬
mit/receive channels is handled by two
separate sets of controls. One set of channel
A.
USA
INT
3
selection arrow keys is found on the front panel directly below the LCD readout. The
14

other set is found cm the front of the microphone. The
current channel selection is viewed in the LCD dis¬
play area.
Tochange channels using either set of arrows, simply
press lUP/DOWNI arrow keys. Observe the chang¬
ing channels in die LCD display area. From your
present channei, pressing lUPl arrow key will in¬
crease the channel numbers. In the same respect,
from your present channel, pressing the IDOWNI
arrow key decreases the channel numbers. If the
highest or lowest channel available is reached and the pressing of the arrow key is
continued, the channel numbers will cycle around to the top or bottom of the list and
continue changing. Holding the [UPI or [DOWN] changes the channel at a rapid rate.
Practice several times to become accustomed to this. Some channels have no TX
function (ie. 15,75,76 guard channels). Please study die channel allocation list in the
Appendix to become familiar with the proper and customary usage.
3.2.5 USA/International Channel Select
The SE 2500 i.s programmed to access both United States
and International channels. Which set of channels you use
is determined by the area of operation. Nornially in U.S.
coastal areas and ports, the USA channels ate selected.
To toggle betw een USA and International channels, press
the lUSA/IP?T] key. The channel type selected is indicated
in the display.
CHANNELTYPE
PUSH
TO
TALK
3.2.6 Voice Transmitting
Until you have memorized the proper usage of each channel, refer to the Assignment
Appendices before attempting to make a voice transmission. There you will find a
listing of the channels and their usage.
Once the proper channel has been selected, locate the Push-To-Talk key on the top
of the microphone. The Push-To-Talk k ey will be referred to from here on out as the
IPTTI key. To transmit, press and hold [piTl for the entire transmission. While
iPTTI is held in, speak i nto the microphone slo wly and clearly, When the transmission
is complete, release the |PTT| key. While the |PTT| key is being held, "TX" appears
in the LCD display window.
15

3.2.7 High/Low Transmit Power
The SE 2500 has two transmit power output levels, 1
Watt and 25 Watts. The low power level (1 Watt) is
provided for situations where the two parties involved
are close to each other. This reduces the congestion on the same channel in areas far
away, allowing more individuals to use a channel at one given time.
To toggle the power output selection between "LO" and "HI" press the [HJ
The transmit power output level is displayed in the LCD display window.
3.2.8 Transmitter 5 Minute Time Out
In the event that the |PTT key is held in for too long, the transmitter timer will
disengage the transmit function afterS minutes. The | PTT | must be lifted and pressed
again to continue transmission. This is designed » prevent a channel from acciden¬
tally being tied up by a malfunctioning micrc^hone or transmitter.
3.2.9 Weather Channels Access
The SE 2500 has the ability to monitor National and International weather service
broadcast. This safety feature allows you to listen to weather reports at any time so
changes can be made in your boating plans. This allows you to alter your planned
course and to make shipboard preparations.
To change from standard marine VHP chan-
nelsto the weather channel broadcast, press the
IwTI key. "WX" appears in the LCD display
indicating weather channel reception. The in¬
itial weather channel displayed, is the last one used. Use the channel change arrow
keys on the microphone or the front panel to select a another weather channel.
To cancel weather channel access, press the | WX| or the 1161 key.
3.2.10 Channel 16 Priority CH 16 PRIORITY KEY
As a convenience and safety feature, the SE 2500
marine VHP radio has a channel |16| priority key.
Pressing this key from any mode or channel immedi¬
ately changes the selected channel to channel 16 with the power output changed to
To leave Emergency-Calling Channel 16, press the channel selection keys.
16

3.2.11 C hannel 13/67 High Power Override
Due to the special usage, FCC assigned channels 13 and 67 are restricted to 1 Watt
under normal conditions. In some simations it is acceptable to override this output
level and transmit on channels 13 and 67 at 25 Watts. To do this, press and hold the
1 HI/LOl key on the front panel of the radio for the duration of the transmission.
The LCD display shows "HI" in the display window while the I HI/LOl key is held
in. Upon releasing the Hl/LO key, transmit output power is dropped back to 1 Watt.
When another marine VHF channel is selected, the IHl/LO | key toggles the transmit
power setting between 1 and 25 watts, and does ntH have to be held in for "HI" power.
3.2.12 Dual Watch
The Dual Watch feature allows you to monitor
channel 16 and ONE other channel. To make
use of this feature the squelch must be proper¬
ly set,
Once the squelch is set, select the "oihcr" channel using the chan nel se lect arrow keys
on the front panel or front of the microphone. Next, press the |DW| key. "DW" is
annunciated in the LCD display. The channel display then changes between channel
16 and the "other" channel until a squelch break occurs. The channel displayed at the
time of the squelch break is then held in the display for 4 seconds after the end of the
squelch break.
Pushing the IPTTI key disables the Dual Watch mode a t any t ime. Also, p ressin g the
channel arrow keys, the channel [I^ priority key, the IWX I key or the |DW| key
turns the Dual Watch mode OFF. Any other key press produces 3 beeps and results
in no change in current configuration.
3.2.13 External Speaker
When the external speaker is connected to the SE 2500, the speaker on the front panel
is disabled automatically. The volume is adjusted in the same way as it is for the front
panel speaker using the volume control knob.
3.3 Methods of Operation
The marine VHF radio channels are becoming ever increasingly crowded. This makes
it very important and every users lesponsibili^ to help relieve channel congestion
through use of professional radio techniques. The following the suggested rules will
help everyone using marine VHF.
17