Entel HT544 Setup guide

PREPARING YOUR RADIO FOR USE
Attaching / removing the aerial
Attaching / removing the battery pack
1. To attach, carefully align the aerial with
the socket. Screw in the aerial clockwise
(taking care not to cross the thread) until it
is seated rmly with the accessory cover’s
rubber ring between the aerial and the top
of the radio. (A)
2.To remove, unscrew the aerial anti-clockwise.
(B)
1. To attach, locate the pegs on the bottom of the
battery into the slots on the radio and press
the top of the battery against the radio. Secure
battery by tightening the screw clockwise
by hand. (Do not use any implement or
overtighten). (C)
2.To remove, unscrew the locking screw
anti-clockwise and pull the battery away
from the top of the radio. (D)
A
B
C
D
SWITCHING ON, RECEPTION
AND SWITCHING OFF
1. To switch on, press and hold the on/off
button (1) on the front of the radio.
2.When the radio has passed its diagnostic tests,
it will emit a fanfare tone.
3.The radio will enter standby mode. This is
indicated by the LED Amber ashing once
every 5 seconds, signalling that the radio is
ready for use.
4.Adjust the volume control (2) to select the
desired volume level.
5. Using the channel buttons (3) ensure you have
the correct channel selected.
6.When receiving a valid signal, the LED will
illuminate steady green and audio will be
emitted from the radio’s speaker or audio
accessory (if attached)
7. When nished using the radio, switch off
by pressing and holding the on/off button
(1) until the radio beeps and the LED/LCD is
extinguished.
TRANSMITTING
1. Perform steps 1 through to 5 of Switching On,
Reception and Switching Off.
2.Before transmitting, monitor the channel
and make sure it is clear.
3.When receiving a signal, wait until the signal
stops before transmitting. The transceiver
cannot transmit and receive simultaneously.
4.Press the PTT (Push To Talk) button (4) to begin
your transmission. To conrm transmission the
LED illuminates red.
5. For best transmitted speech quality, you must
talk directly into the radio’s microphone (9) at
around 4cm between your mouth and the radio
complete, the charger.
6.Please note: if you talk into the top of the
radio or with your mouth further away, you will
transmit poor quality speech.
7. When the transmission is nished release the
PTT button.
EU DECLARATION OF CONFORMITY
We. Entel UK Limited of:
320 Centennial Ave, Centennial Park,
Elstree. WD6 3TJ United Kingdom
Tel [phone]
[e-mail]
Declare under our sole responsibility that the
product ranges specied below conform to
the following standards or other nominative
documents;
HT544, HT844 V2 series, HT944 V2 series,
EN 301 178-2 V1.2:2007
EN 60945:2002
EN 60950-1:2006 in accordance with
Directive 1999/5/EC
This declaration is valid for Directive 94/9/EC
until 19 April 2016
This declaration is valid for Directive 2014/34/
EU from 20 April 2016
HT544, HT844 V2 series, HT944 V2 series
EN 60079-0:2012
EN 60079-11:2012
Related certicates:
HT844 V2 series, HT944 V2 series
Sira 10ATEX2066X
HT9X X marking Ex ll 2 G Ex ib llC T4 Gb
HT8X X marking Ex ll 2 G Ex ib llA T4 Gb
HT544
IECEx SIR 10.0097X
Marking Ex ll 2 G Ex ib llA T4 Gb
Sira Certication. Unit 6, Hawarden Industrial
Park,Hawarden, Deeside. CH5 3US, UK
Notied Body No. 0518
Quality Assurance Notication:
Intertek. Intertek House, Leatherhead
KT22 7SB, UK
Notied Body No. 0359
Name: Mike Jamieson
Position: Quality Manager
Date: 1st December 2015
Signed:
www.entel.co.uk
HTx44 Series
HT544 |HT844 | HT944
Quick Start User Guide
Designed in the United Kingdom

Quick Start User Guide V2.1
HTx44 Series
HT544 |HT844 | HT944
INTRODUCTION
The Entel HTx44 series are a range of professional IP68 submersible
marine handheld transceivers that operate on the VHF marine band. They
have 56 marine international channels and 36 dealer programmable private
channels.
This quick guide provides basic guidance for operating your radio.
A full version of this user guide is available to download from our website.
www.entel.co.uk.
To meet your exact requirements the radio may have been customised by
your Entel dealer. These features will be explained in a separate guide
issued by the dealer.
PACKING LIST
HTx44 Marine VHF transceiver
CNBxxx Rechargeable Li-Ion battery
CBH950 Spring loaded belt clip
CCAHT Trickle charger pod
CAT40 High efciency antenna
CWCHT Mains adaptor
OPTIONAL ACCESSORIES
Attaching and removing accessories
To attach an accessory, remove the accessory cover by unscrewing the
locking screw anti-clockwise (leave the cover attached or store in a safe
place).
Plug the accessory into the socket, then carefully
tighten the locking screw clockwise until nger tight
(do not overtighten or use any implement)
To remove an accessory, unscrew the locking
screw of the accesso r y by hand in an anti - cl o c k wi s e
direction.
Ensure you re-t the accessory socket cover (the
radio is not submersible without the socket covered)
BATTERY INFORMATION
Battery charging
1. Connect the AC adapter to the charger pod and plug in.
2.Turn the transceiver off.
3.Insert the battery pack into the charger pod, either with or without the
transceiver attached. The charger LED status light changes to red and
charging begins.
4.When charging is complete, the charger status LED changes from red
to green (a fully discharged battery pack will take approximately 6 hours
to recharge).
A ashing red LED on the charger indicates there is a problem with the
battery. Remove the battery from the charger and consult your Entel Dealer.
CAUTION
BATTERY PACK PRECAUTIONS
• Do not recharge the battery pack if it is already fully charged. Doing so
may cause the life of the battery pack to shorten or the battery pack may
be damaged.
• After charging is complete, remove the battery from the charger. If the
power to the charger is turned off and on again, charging will restart and
the battery will become overcharged.
• Please ensure that the radio is turned off before placing it in the charger
and never switch a radio on whilst in the charger.
• Only use Entel branded battery pack and chargers.
• Do not short the battery terminals or dispose of the battery in a re.
• Do not charge the transceiver and/or battery pack if they are wet.
DANGER
DO NOT DISASSEMBLE OR MODIFY THE BATTERY IN ANY WAY!
Your Entel battery pack incorporates safety circuitry to avoid danger. If the
safety circuitry is damaged or bypassed, or the battery cells are damaged
directly, they may generate extreme heat, smoke, rupture and emit ames.
CONTROLS & INDICATORS
Above approvals apply to specic models only
2
3
7
6
8
1
5
4
5
7 KEY LCD
1. On/Off button. Press and hold to turn the radio on or off
2.Volume control
3.Channel up / down buttons
4.Push To Talk (PTT) button. Press to speak and release to listen
5. Dealer programmable button (ask your dealer for more information).
6.LED Indicator
Red steady - Transmitting
Red ashing slowly - Battery needs recharging
Green - Receiving
7. Change channel mode from INT/USA/CAN
8.MEM Button: Adds or removes the currently selected channel to or
form the scan list
SCAN Button: Starts/stops scanning the channels added to the scan
list plus CH16
16 Button: Toggles between the currently selected channel and
channel 16
MON Button: Short press momentarily opens squelch. Long press
latches squelch open (short press re-sets)
9. Microphone
9
T
a
l
k
H
e
r
e

PreparingYour Radio For Use
56
a
b
4
Attaching / Removing the Belt Clip
5To attach, slot the clip onto the slot on the
back of the battery and slide up until you hear
a “click”
6To remove, pull the tab towards the belt clip
(a).Then slide the belt clip downwards (b)
Attaching / Removing the Aerial
1
To attach, carefully align the aerial with the
socket. Screw in the aerial clockwise (taking care
not to cross the thread) until it is seated firmly
with the accessory cover’s rubber ring between
the aerial & the the top of the radio.
2
To remove, unscrew the aerial anti-clockwise.
12
Attaching / Removing Audio Accessories
3To attach, remove the accessory cover by unscrewing the locking
screw anti-clockwise (leave cover secured under
antenna as this provides a waterproof seal). Attach accessory
plug by locating over the socket. Carefully tighten the locking
screw clockwise until finger tight (do not tighten with a
screwdriver etc).
4To remove, unscrew accessory plug the locking screw by hand
in an anti-clockwise direction (carefully use a coin or
screwdriver if too tight). Ensure you re-fit the accessory
waterproof cover so as to protect the accessory socket.
Common
Warranty
The HT54x comes with a 24 month warranty,
for details see our full terms & conditions.
Advice
• Do not use options or accessories not
specified by Entel
• Ensure that the radio is used within the
parameters for which it was designed
• Please switch the transceiver off before
connecting optional accessories
Warning
Turn the transceiver off in the following locations:
•In explosive atmospheres (flammable gas, dust
including metallic & grain powders etc)
•Whilst taking on fuel or while parked near a fuel
station
•Near explosives or blasting sites
•In aircraft, medical institutions or near persons
known to be wearing a pacemaker
Caution
•Do not disassemble or modify the transceiver
for any reason
•Do not transmit while touching the antenna
terminal or any exposed metallic parts of the
aerial as this may result in a burn
•Please check and observe regulations in your
country with regard to use whilst driving
End of Life Disposal
When your Entel transceiver reaches the end of its useful life,
please ensure that the unit is disposed of in an environmentally
friendly way. For country specific information please see
www.entel.co.uk/recycling.
Cleaning your Radio
After exposure to any potentially corrosive substance
including salt water it is recommended to thoroughly wash
the transceiver in fresh water. If washing with the battery
removed from the radio, ensure that the battery is not
immersed in water & that the accessory cap is attached &
clean only with a damp cloth.
3
Introduction
The HT54x are professional marine handheld transceivers that operate on theVHF marine band.
The HT544 has 58 international marine channels and 36 dealer programmable private channels. The 58
marine channels are switchable to comply with International, USA or Canadian regulations, which can be
done directly via the radio’s keypad using the screen’s LCD. It has an emergency channel, which can be
immediately selected from any channel using the 16 button. The HT542 has 16 channels within the marine
band.
The HT54x commercial grade HT Series 2.0 portables utilise the latest intelligent Lithium-Ion battery
technology and includes the following features: scan, battery life indicator, VOX (voice operated transmit)
and low battery indicator.
•HT54x Transceiver
•CNB550E Rechargeable 1800mAh Li-Ion battery
•CBH750 Spring loaded belt clip
Packing List
•CATXX Antenna
•CCA trickle charger included with certain models
Radio Care
Note: Do not
wash the
transceiver if
you suspect the
waterproofing
seal may be
damaged. Please
return to your
supplier for
inspection /
repair.
Common

Battery Charging
1. Connect the AC adapter to the charger
pod. The LED status light will illuminate
green indicating ready for charge
2. Turn the transceiver off
3. Insert the battery pack into the charger
pod, either with or without the
transceiver attached. The LED status light
changes from green to RED & trickle
charge begins
4. A fully discharged battery pack will take
approximately 6 hours to charge,
depending on the remaining power
condition.When charge is complete, the
LED status light turns green.
Overcharging:
The battery pack has an over-current
protection circuit fitted. When charging a
completely discharged battery i.e. first charge,
ensure the battery is removed from the radio
and then re-attached (if fitted to radio when
charging). This will reset the protection
circuitry and ensure normal operation.
6
Battery Care / Information
This process will need to be repeated if the
battery is allowed to completely discharge in
the future. In normal use this is unlikely.
Battery Indicator
For your safety and con-
venience your
transceiver continually
monitors the battery pack and gives an
indication on the LCD:
•3 Segments: 12 hours
•2 Segments: 1 hour
•1 Segment: 20 mins
Note: Only genuine Entel batteries should be
used. Customer satisfaction is assured as you
can not be supplied with sub standard,
potentially dangerous battery packs from 3rd
party manufacturers, ensuring it delivers the
expected capacity and endurance.
On HT series batteries a breathable
membrane is used.This is clearly marked on
the battery label. Piercing the membrane will
allow water ingress to the battery, & will
invalidate the warranty.
Optional Accessories
Attaching & Removing Accessories
To attach an accessory: Remove the accessory cover by unscrewing the
locking screw anti-clockwise (leave cover attached or store in a safe place).
Attach accessory plug to the socket. Carefully tighten the locking screw
clockwise until finger tight (do not tighten with a screwdriver etc).
To remove an accessory: Unscrew the locking screw of the accessory by
hand in an anti-clockwise direction (carefully use a coin or screwdriver if too
tight). Ensure you re-fit the accessory cover so as to protect the socket.
Common
Introduction
Your Entel radio is supplied with a high
performance Lithium-Ion (Li-Ion) battery.
These batteries:
•Extend talk time
•Reduce the battery’s size and weight
•Do not suffer from ‘memory effect’ that
reduces the life of Ni-Cad and NiMH batteries
•Have a low toxicity, therefore reducing the
impact on the environment
Battery Pack
•If a battery is not to be used for an extended
period of time (e.g. several months) remove
the battery pack from the equipment and
store in a cool and dry location (around
0°C) part charged.
Do not fully discharge the battery before
storage
•Each charge cycle reduces the battery’s life.
Minimise the number of times you charge
your battery especially in hotter environ-
ments which further shortens a battery’s life
Battery Pack Precautions
•Switch the transceiver OFF before charging
•Charge the battery pack before use
•Do not recharge the battery pack if it is
already fully charged.
•Charge the battery in accordance with the
instructions enclosed with your charger
•Do not charge the transceiver and /or
battery pack if they are wet.
The battery pack includes potentially
hazardous components. Please:
•Do Not disassemble or reconstruct battery
•Do Not short-circuit the battery
•Do Not incinerate or apply heat to the
battery
5
Battery Care / Information
•Do Not immerse the battery in water unless
attached securely to the radio or get it wet
by other means
•Use only the specified charger and observe
charging requirements
•Do Not pierce the battery with any object
or strike it with an instrument
•Do Not use the battery pack if it is damaged
in any way
•Do Not reverse-charge or reverse connect
the battery
•Do Not touch a ruptured or leaking battery.
If liquids from the battery get into your eyes,
immediately:
•Wash your eyes out with fresh water &
avoiding rubbing them.
•Seek medical treatment.
Common
Attaching / Removing the Battery Pack
1To attach, locate the pegs on the bottom of the
battery into the slots on the radio and press
the top of the battery against the radio. Secure
battery by tightening the screw clockwise by
hand. (Do not over tighten)
2To remove, unscrew the locking screw
anticlockwise & pull the battery away from the
top of the radio.
12

8
Standard Features:
•16 programmable channels
•Top mounted monitor button
•CTCSS & DCS (analogue & digital squelch) with squelch tail elimination (removes the ‘shh’ noise)
•Exceptionally loud and clear audio
•Robust design, exceeds MIL-STD-810C/D/E/F
•Environmentally protected to IP68 i.e. submersible to 5 metres for up to 60 minutes
•1800mAH Lithium-Ion battery for superior operational time
•Full band switching allows access to all channels in each band
•Battery charge count
•Radio cloning mode
•Low battery alert indicates when the battery needs recharging
Dealer programmable features:
•VOX for hands free operation
•High / Low transmit power
•Normal & priority scan (programmable per channel position)
•Panic (personal attack) button causes high pitch, high volume, siren tone to be emitted from the
radio’s speaker
•Key lock button
•Prefixed minimum volume level and fixed bleep level
•Talkaround (allows communication away from a base station)
•Transmit time out-timer (ensures channels are not blocked)
•Voice scrambler with 1 code per channel (option)
•Automatic power save to further increase operational time
•User adjustable squelch level
HT542
HT542
Carry Options
CLC952 Heavy duty black leather case with strap & belt loop
CLC953 Heavy duty black leather case with strap & belt loop
CLC956 Heavy duty black leather case with strap & belt loop
CBH750 Spare spring loaded belt clip
Audio Accessory Options
CMP500 Heavy duty submersible speaker microphone
EHP9 D-shaped earpiece (plugs into CMP500 above)
EA12/950 D-shaped earpiece with in-line PTT/microphone &VOX*
EA15/950 Earpiece microphone with transparent acoustic tube &VOX*
EA19/950 D-shaped earpiece with boom microphone and in-line PTT &VOX*
EHP950 D-Shaped earpiece (connects directly to radio)
EPT40/950 Bone conductive earpiece microphone with PTT and VOX*
CHP950HS Single earpiece heavy duty ear defender headset with boom mic for hard hat &VOX*
CHP950HD Double earpiece defender headset with boom mic & in line PTT for hard hat &VOX*
CHP950D Double earpiece headband defender headset with boom mic and in line PTT & VOX*
CHP950BT Bluetooth double earpiece headband defender headset with boom mic & ear cup PTT
* VOX = Voice Operated Transmit (hands free operation)
7
Battery & Charger Options
CNB550E Spare intrinsically safe approved 1800mAh Lithium-Ion battery pack with rear clip
CSAHT 1-way intelligent rapid charger, 100-240v
CSBHT 6-way intelligent, rapid charger, 100-240v
CCAHT-230 1-way trickle charger with 230V mains adapter
CCAHT-110 1-way trickle charger with 110V mains adapter
CCAHT-12 1-way trickle charger with cigar lighter lead, 12V DC operation
Optional Accessories
Bluetooth option board in radio is required to use Bluetooth audio accessories.
Antenna Options
CXW640 Antenna adapter for external aerial
CAT20 Helical antenna VHF
CAT80 Whip antenna UHF
CAT20S Stubby antennaVHF
CAT80S Stubby antenna UHF
For complete up to date list of optional accessories visit www.entel.co.uk
CAT10S-78 78MHz compressed antenna
CAT10S-85 85MHz compressed antenna
CAT10S 66-88MHz uncut compressed antenna
CAT700-40 30-50MHz antenna
Note: The use of non Entel approved accessories will invalidate your intrinsically safe
approval. Refer to certificate Sira 10 for permitted accessories.
Common

Standard Features:
•Environmentally protected to IP68 i.e. submersible to 5 metres for up to 60 minutes.
•Robust design, exceeds MIL-STD-810C/D/E/F.
•LCD screen to display channel number & current settings \ status.
•1800mAH Lithium-Ion battery for superior operational time.
•INT, USA, CAN channels.
•Full transmit power output 5 Watts.
•Exceptionally loud & clear audio .
•Ch 16 \ 9 shortcut button.
•WX shortcut button.
•Scan button.
•Monitor button.
•MEM button.
•Automatic power save to further increase operational time.
•Low battery alert indicates when the battery needs charging or replacing.
•Battery charge count to indicate when a battery needs replacing.
Dealer Programmable Features:
•Key lock button
•Prefixed minimum volume level and fixed bleep level
•VOX (Voice Operated Transmit) Function.
HT544
10
H542
HT544
9
Controls & Indicators
3Channel / Scan
control
Antenna
5Dealer
programmable
button 1
4Push To Talk
(PTT) button
6Dealer
programmable
button 2
1On / Off
2Volume control
Speaker
Microphone
1On / Off button. Press to turn radio on, press and hold to turn off.
2Press up / down buttons to increase / reduce volume.
3Channel / Scan control. Rotate to select the desired channel or scan setting.
4Push To Talk (PTT) button. Press to speak and release to listen.
5Dealer programmable button 1 (ask your dealer for more information).
6Dealer programmable button 2 (ask your dealer for more information).
7Dealer programmable button 3 (ask your dealer for more information).
8LED indicator.
•RED steady = Transmitting
•RED flashing slowly = Battery needs re-charging
•GREEN steady = Receiving
•YELLOW steady = Non valid signal detected
•YELLOW flashing rapidly = Scanning
7Dealer
programmable
button 3
8LED indicator

12
Channels
INT, USA & Canadian Modes
In compliance with worldwide license regulations the following versions of HT544
are available:
Version A: INT, USA & Canadian modes
Version B, C & D: INT mode only
1. In the case of version A only; to change the channel set of the transceiver, hold down the
[WX] key.The mode changes from USA to Canadian to International.
2. Refer to the marine channel charts in this booklet for allocated channels in each mode.
NOAA Weather Channels
(Applicable to version A model only)
1. To receive a weather channel, press the [WX] key.The transceiver enters into weather
channel mode.
2. There are 10 weather channels. Use the & buttons to select the desired channel.
3. To exit from the weather channels press the [WX] key.The transceiver recalls the previous
working channel.
Emergency Channels
To select the emergency channel, press the [16/9] button from any channel. Channel 16 appears
on the display.
To recall the previous channel used, press the [16/9] button once again.
Channel 9
Channel 9 is used as a hailing channel for initial, non-emergency contact with other vessels. Hold
down the [16/9] key for 1 second to select channel 9.
To recall the previous channel used, press the [16/9] button twice.
Monitor Channels
Press the blue monitor button on the top of the radio to defeat the squelch mute and release
button to mute radio.A long press (radio will beep) will hold the squelch mute open until
pressed again to cancel again to return to squelch mute.
Adjusting Squelch Threshold
Press the blue monitor button on the top of the radio and switch radio on. Use &
buttons to adjust threshold (between 01 - 16, 01 is more sensitive & 16 is less sensitive). Press
MEM to store the setting.
HT544
11
UsingYour HT544
1. Turn the transceiver on by rotating the volume control in a clockwise direction.A power on tone
is generated after 1 second to indicate the transceiver has passed its self-diagnostic test. During
standby the LED indicator will pulse amber every 3 seconds, to further verify its
circuitry is functioning correctly. Select the desired audio level by further rotating the control
clockwise.After power-on, the transceiver will always default to the last channel selected.
2. Turn the squelch control fully counter clockwise, then rotate clockwise until the white noise stops.
This condition is known as the "squelch threshold". If the control is turned clockwise past this
point, weak signals may not be received. No noise or signal is heard until a signal is received that
exceeds the squelch threshold.
3. Select the desired channel using the [UP/DOWN] buttons. A full listing of channels can be found
on page 17-18. Sometimes, a slight adjustment of the squelch threshold is needed as some
channels have a higher noise level than others.
4. When receiving a signal the LED indicator illuminates green. An “RX” is also displayed on the
LCD.
Reception
Transmitting
1. Perform steps 1 through 3 of RECEPTION.
2. Before transmitting, monitor the channel and make sure it is clear.
3. For communications over short distances, press the [H/L] key and select low power (1 watt).
Transmitting on 1 watt prolongs battery life, and should be selected whenever possible.
4. When receiving a signal, wait until the signal stops before transmitting.The transceiver cannot
transmit and receive simultaneously.
5. Press the [PTT] (Push-To-Talk) button to begin your transmission.To confirm transmission in
progress the LCD indicator illuminates TX and the LED illuminates RED.
6. Hold the transceiver 1 inch from your mouth and speak slowly and clearly into the microphone.
7. When the transmission is finished release the [PTT] button.
Turning The Radio On & Off
Turn the ON/OFF control on the top of the radio clockwise until the LCD iluminates & a short
beep is emitted. To turn the radio off turn the ON/OFF control anti-clock wise until the LCD
deluminates.
UsingYour radio
Before using your radio you may need to adjust the volume on the radio to take in to account
background noise. Adjust the volume using the rotary control on the top of the radio.
HT544

14
The Scan Function
1. Select the desired channel to be scanned using the & buttons.
2. Press the [MEM] button to store the channel in the transceiver’s memory. [MEM] is
displayed on the LCD.This channel is now memorised to be scanned.
3. To add further channels, repeat steps 1 & 2.
4. To delete a channel from the transceiver’s scan list, press the [MEM] button on a channel
that displays the [MEM] icon until the icon disappears.
5. All channels programmed remain in the transceiver’s scan memory, even if the power is
switched off.
6. Adjust the squelch control until the white noise is eliminated.
7. To start scanning, press the [SCAN] key.The scan proceeds from the lowest to the highest
programmed channel number & stops on channels when a transmission is received.
8. To stop the scan at any time, press the [SCAN] key again.
VOX (Voice Operated Transmit)
Press the [MEM] button & switch the transceiver on.The VOX symbol & a "0" will flash. "0"
indicates VOX is switched off, 1 is for low sensitivity, 5 is for normal sensitivity, and 9 is for high
sensitivity. Use the [UP/DOWN] button to select the desired level, press [MEM] to
confirm, the transceiver is now set toVOX.To switch VOX off, go back into VOX programming
mode by holding the [MEM] key whilst switching on. Press the UP/DOWN button until the vox
level is "off" and press [MEM] to confirm.
In VOX mode the transceiver will react to your voice, and transmit automatically without you
having to press the PTT button.There is always a slight delay for the electronic switching &
consideration will need to be given.To get optimum performance from the VOX feature you
should use a noise cancelling headset or earpiece microphone (see accessory options).
Functions
HT544
SIMPLEX / DUPLEX CHANNEL USE
Your transceiver has been factory programmed in accordance with FCC (USA), Industry Canada
and International regulations.The mode of operation cannot be altered from simplex to duplex
or vice versa. Simplex or duplex mode is automatically activated, depending on the channel and
the channel set and whether USA, Canadian, or International mode is selected.
Refer to the channel charts listed on pages 17-18 of this user manual.
If you have a licence to use a specific simplex or semi-duplex channel, contact your dealer who
may be able to programme your channel using the transceiver’s private channel memory.
CHANNEL A/B INSTANT ACCESS
For your convenience, two user assigned channels can be programmed for instant access. If the
[A/B] key is pressed and no channel A or B has been assigned, a short beep will be heard.
PROGRAMMING A/B INSTANT ACCESS BUTTONS
1. Hold down the [A/B] key and turn on the transceiver.
2. The letter A will appear on the display and dashes "_ _" indicate that no channel has been
designated channel A.
3. Press the [UP/DOWN] button until the desired channel number is displayed.
4. With the desired channel number displayed, press the [MEM] key once.The "A" will stop
flashing, indicating that the displayed channel is now designated channel A.
5. Press the A / B button again.The letter "b" will appear on the display.
Repeat steps 2 through to 4.
6. Switch transceiver off and on to exit this mode and save changes. If you wish to clear instant
access channels follow step 1 then press the [MEM] key.The “A” will flash. Now switch the
transceiver off and on again.
Note: Should you later wish to delete any stored channels simply press "MEM" key whilst in
A/B programming mode.
OPERATION OF A/B INSTANT ACCESS BUTTONS
Pressing the [A/B] button will toggle between A, B and the previous selected working channel.
Channel A is represented by the "A" to the left of the channel number on the LCD, & channel B
is represented by "B".
Note: Do not confuse this "A" with the one that is sometimes displayed to the right hand side
of the channel number (in USA and Canadian modes)
13
Channels
HT544

16
Controls
1 Power & Volume Control: Powers the radio on and off and controls the volume.
2 The Microphone: Internal condenser microphone
3 Up / Down Buttons: Press up / down buttons to change channel.
4 16/9 Button: A momentary press of the button selects channel 16 and a longer press
select channel 9.
5 WX Button: Immediately recalls the weather channels.
6 Scan Button: Starts / Stops scanning the memorised channels.
7 The MEM Button: Memorises a desired channel for scanning.
8 The A/B Button: Provides Instant access to preassigned channels (if programmed)
9 Speaker: The Radio’s Speaker.
HT544
15
LCD Indicators
Indicator Description
High power selected (5 Watts)
Low power (1 Watt).
The Radio is Transmitting.
The Radio is Recieving.
Indicated channel is memorised for scanning.
Scrambler mode enabled (version A & B only).
Voice operated transmit mode enabled.
Indicates the channel set for USA.
Indicates the channel set for Canadian.
Indicates the channel set for International.
NOAA weather channels selected (USA & Canadian waters only).
A ship-to-ship channel (in USA or Canadian mode).
Battery life indicator.
Indicates keypad is locked, excluding the PTT, H/L & LAMP buttons.
Private channel number selected.
Duplex channel selected (not simplex).
HT544

18
Troubleshooting
SYMPTOM PROBABLE CAUSE REMEDY
Transceiver not switching on Battery needs charging or
battery is exhausted
Charge the battery pack
replace the battery pack
The scan key does not start
the scan
No channels memorised
(MEM) Squelch is not adjusted
Use the MEM key to enter
desired channels into scan
memory.Adjust the squelch to
threshold or to the point
where the white noise just
disappears.
Cannot change any function Key lock is switched on Turn key lock off
The LED on the charger does
not illuminate when charging
Defective battery or charger.
Dirty terminal contact on
battery or charger
Contact your dealer Clean
contacts with dry clean cloth
No transmit or cannot select
high power
Some channels are low power
only Battery pack exhausted
Change to high power channel
Charge / replace the battery
Transceiver transmits without
pressing PTT button Buttons
seem to work intermittently
VOX has been enabled
Hold MEM button for 2 secs,
use UP or DOWN button &
select “off” to turn VOX
off
17
Controls
10 Lamp / Key lock Button: Momentarily pressing this button illuminates the LCD display.
Holding this button for over 1 second activates the key lock. To deactivate the key lock
press & hold the button again until the lock removes.
11 The Radio’s Battery Pack: Rechargeable lithium-ion battery pack.
12 PTT (Push To Talk Switch): Hold down to transmit, release to receive.
13 H/L Button: Press and hold this button for 1 second to toggle between high and low
power (1 & 5 Watts).
14 The Accessory Connector: Used to attach any HT544 approved accessory.
15 LED Indicator: Indicates the status of the radio:
• RED Steady = Transmitting
• RED Flashing slowly = Battery needs re-charging
• GREEN Steady = Receiving
16 Monitor Button: Press to monitor the channel without the squelch mute.
17 Antenna Connector: Use to attach the antenna of the radio.
HT544
HT544

20
Channel Chart
CH Channel Set S/D Frequency Channel Use
USA CAN INT Receive Transmit
22A X X S 157.10000
22 XD 161.70000 157.10000 PORT OPERATION, SHIP MOVEMENT
23A XS 157.15000 U.S. GOVERNMENT ONLY
23 X X D 161.75000 157.15000 PUBLIC CORRESPONDENCE
24 X X X D 161.80000 157.20000 PUBLIC CORRESPONDENCE
25 X X X D 161.85000 157.25000 PUBLIC CORRESPONDENCE
26 X X X D 161.90000 157.30000 PUBLIC CORRESPONDENCE
27 X X X D 161.95000 157.35000 PUBLIC CORRESPONDENCE
28 X X X D 162.00000 157.40000 PUBLIC CORRESPONDENCE
37 XS 157.85000 MARINA CHANNEL
60 X X D 160.62500 156.02500 PUBLIC \ PORT OPERATIONS
61A X X S 156.07500 -
61 XD 160.67500 156.07500 PUBLIC \ PORT OPERATIONS
62A XS 156.12500 -
62 XD 160.72500 156.12500 PUBLIC \ PORT OPERATIONS
63A XS 156.17500 PORT OPERATIONS
63 XD 160.77500 156.17500 PUBLIC \ PORT OPERATIONS
64A X X S 156.22500
64 X X D 160.82500 156.22500 PUBLIC \ PORT OPERATIONS
65A X X S 156.27500 PORT OPERATIONS
65 XD 160.87500 156.27500 PUBLIC \ PORT OPERATIONS
66A XS 156.32500 PORT OPERATIONS
66A XS 156.32500 PORT OPERATIONS
66 XD 160.92500 156.32500 PUBLIC \ PORT OPERATIONS
67 X X S 156.37500 INTERSHIP
67 XS 156.37500
68 X X X S 156.42500 NON-COMMERCIAL
69 X X X S 156.47500 INTERSHIP
70 X X X R 156.25000 - DIGITAL SELECTIVE CALLING
71 X X X S 156.57500 PORT OPERATIONS
72 X X X S 156.62500 NON-COMMERCIAL \ INTERSHIP
73 X X X S 156.67500 INTERSHIP
19
Channel Chart
CH Channel Set S/D Frequency Channel Use
USA CAN INT Receive Transmit
1A XS 156.05000 PORT OPERATION AND COMMERCIAL
1X X D 160.65000 156.05000 PUBLIC, PORT OPERATIONS
2X X D 160.70000 156.10000 PUBLIC, PORT OPERATIONS
3A XS 156.15000 US GOVERMENT, COAST GUARD
3X X D 160.75000 156.15000 PUBLIC, PORT OPERATIONS
4A XS 156.20000 COMMERCIAL FISHING
4XD 160.80000 156.20000 PUBLIC, PORT OPERATIONS
5A X X S 156.25000 PORT OPERATIONS,VTS IN SEATTLE
5XD 160.85000 156.25000 PUBLIC, PORT OPERATIONS
6X X X S 156.30000 INTER-SHIP SAFETY
7A X X S 156.35000 COMMERCIAL
7XD 160.95000 156.35000 PUBLIC, PORT OPERATIONS
8X X X S 156.40000 COMMERCIAL (INTER-SHIP ONLY)
9X X X S 156.45000 BOATER CALLING CHANNEL
10 X X X S 156.50000 COMMERCIAL / INTERSHIP
11 X X X S 156.55000 COMMERCIAL / PORT OPERATIONS
12 X X X S 156.60000 PORT OPERATION
13 X X S 156.65000 INTER-SHIP NAVIGATION SAFETY
13 XS 156.65000 INTER-SHIP NAVIGATION SAFETY
14 X X X S 156.70000 PORT OPERATION
15 XR 156.75000 - SHIP MOVEMENT
15 X X S 156.75000 SHIP MOVEMENT \ INTERSHIP
16 X X X S 156.80000 INTERNATIONAL DISTRESS
17 X X X S 156.85000 STATE CONTROLLED \ INTERSHIP
18A X X S 156.90000 COMMERCIAL
18 XD 161.50000 156.90000 PORT OPERATION, SHIP MOVEMENT
19A X X S 156.95000 COAST GUARD
19 XD 161.55000 156.95000 PORT OPERATION, SHIP MOVEMENT
20A XS 157.00000 PORT OPERATION
20 X X D 161.60000 157.00000 PORT OPERATION AND SHIPMENT
20 XD 161.60000 157.00000 PORT OPERATION AND SHIPMENT
21A X X S 157.05000 U.S. GOV, CANADIAN COST GUARD
21 XD 161.65000 157.05000 PORT OPERATION, SHIP MOVEMENT
HT544
HT544

22
Technical Specifications
Frequency Range 156 - 163.275MHz
Channel Spacing 25 kHz
Communication Method Simplex
Antenna High Efficiency Helical
Antenna Impedance 50 ohm
Power Supply Voltage 7.4 V DC
Battery Life 8 Hours
Current Drain (nominal) Standby 40mA; RX: 390 mA; 1.0 W audio output (1kHz)
TX: Less than 1 A at 2W, 0.7 A at 1W.
Duty Cycle TX: 10%, RX 10%, Standby: 80%
Microphone Internal condenser microphone
Operating Temperature -20°C to 60°C
Size
Height = 130mm (145mm including knobs);
Width = 59.5mm (62mm including protrusions);
Diameter = 37mm (41mm including battery protrusions);
Weight Less than 300g.
GENERAL
Channel Chart
CH Channel Set S/D Frequency Channel Use
USA CAN INT Receive Transmit
74 X X X S 156.72500 PORT OPERATIONS
75 X X S 156.77500 PORT \ GUARD CHANNELS
76 X X S 156.82500 PORT \ GUARD CHANNELS
77 X X S 156.87500 PORT OPERATIONS
77 XS 156.87500 PORT OPERATIONS \ INTERSHIP
78A X X S 156.92500 NON-COMMERCIAL
78 XD 161.52500 156.92500 PUBLIC \ PORT OPERATIONS
79A X X S 156.97500 COMMERCIAL
79 XD 161.57500 156.97500 PORT OPERATION, SHIP MOVEMENT
80A X X S 157.02500 COMMERCIAL
80 XD 161.62500 157.02500 PORT \ SHIP MOVEMENT
81A X X S 157.07500
81 XD 161.67500 157.07500 PORT OPERATION
82A X X S 157.12500
82 XD 161.72500 157.12500 PUBLIC \ PORT OPERATIONS
83A X X S 157.17500
83 X X D 161.77500 157.17500 PUBLIC CORRESPONDENCE
84A XS 157.22500 PUBLIC CORRESPONDENCE
84 X X X D 161.82500 157.22500 PUBLIC \ PORT OPERATIONS
85A XS 157.27500 PUBLIC CORRESPONDENCE
85 X X X D 161.87500 157.27500 PUBLIC CORRESPONDENCE
86A XS 157.32500 PUBLIC CORRESPONDENCE
86 X X X D 161.92500 157.32500 PUBLIC CORRESPONDENCE
87A XS 157.37500 PUBLIC CORRESPONDENCE
87 X X D 161.97500 157.37500 PUBLIC CORRESPONDENCE
87 XS 157.37500 PUBLIC CORRESPONDENCE
88A XS 157.42500 COMMERCIAL
88 X X D 162.02500 157.42500 PUBLIC CORRESPONDENCE
88 XS 157.42500 PUBLIC CORRESPONDENCE
Key:
• S = Simplex.
• D = Duplex.
• R = Receive Only.
21
HT544
HT544

24
Glossary of Terms
Term Description
Canadian
Channels
Channels designated as defined and regulated by Industry Canada, (RIC),
Marine Communications & Traffic Services.
Duplex Transmit and receive on different frequencies.
Encryption Scrambled audio for extra privacy.
FM Frequency Modulation.
International
Channels
Channel designations as defined for use in international waters by the
International Telecommunications Union (ITU).
Marine
Channels
Special channels reserved for marinas located in selected European
countries.These channels are pre-programmed in the transceiver as P1 & P2.
Private
Channels
Channels which are assigned by regulatory agencies governing VHF radio use
for a specific region or country.These channels are prefixed with a "P" and
can only be programmed into the transceiver by authorised dealers.
PTT Press To Talk (Transmit)
RX Receive
Simplex Transmit and receive on the same frequency.
Squelch To suppress background noise
TX Transmit
Transceiver A device that can transmit and receive
USA
Channels
Channel designations as defined by the Federal Communications Commission
(FCCVOX )
VOX Voice Operated Transmit
VHF Very High Frequency (30MHz to 300 MHz)
Frequency Range 156.025 - 157.425
Power Output Selectable: HIGH = 4W, LOW = 1W
Modulation 16K0G3E
Oscillator Method PLL
Frequency Stability ±2PPM
Maximum Deviation ±5 kHz
Audio Distortion < 5% (1 kHz 60%)
Spurious Emissiong -55db
Hum & Noise -40 [dB]
TRANSMITTER
23
Technical Specifications
Frequency Range 156 - 163.275MHz
Receiver Type Double Super Heterodyne type
Sensitivity <0.25uV (12dB SINAD)
Frequency Stability ±2PPM
Spurious Rejection -60 dB
Adjacent Channel Selectivity -70 dB
Distortion < 3% Typical
Hum & Noise -40 dB
Audio Output 1W
Speaker Size 38 mm
RECEIVER
Common
HT544

25
Notes
Use this page to record important information, such as the serial number of your radio and any
private channels programmed by your dealer etc.
26
Notes
Notes
Notes

Certification
SAFETY NOTES
•HT54x radios must always be used within the terms of their certification.
•Keep the radios away from aggressive substances. If used in a hostile environment, extra
protection may be needed.
•To prevent ignition of hazardous atmospheres, batteries must only be charged in an area
known to be non-hazardous.
•Use of battery chargers other than the Entel charger supplied will invalidate the explosion
protection certification.
•No unauthorised repairs are permitted.
•Radios fitted with a CNB550E battery pack must not be used outside of the ambient
temperature range Tamb = -20ºC to +28ºC
•Radios fitted with a CNB550E battery pack must not be used outside of the ambient
temperature range indicated on the battery pack label.
27
Certification
Ex ib IIA T4
‘the
choice’
professional’s
Headquarters: United Kingdom www.entel.co.uk
Copyright Entel UK Ltd. 2009
<Intended Country Of Use>
AT
BE
BG
CY
CZ
DK
EE
FI
FR
DE
GR
HU
IS
IE
IT
LV
LT
LU
MT
NL
NO
PL
PT
RO
SK
SI
ES
SE
CH
UK
Registered Community Design Application 000810890
U.S. Design Patent Pending No. 23/182,829
Copyright and Unregistered Design Right Entel UK 2009
All rights reserved