PREPARING YOUR RADIO FOR USE SWITCHING ON, RECEPTION EU DECL AR ATION OF CONFORMIT Y

AND SWITCHING OFF We. Entel UK Limited of:

HTx44 Series
Attaching / removing the aerial 320 Centennial Ave, Centennial Park,
1. To switch on, press and hold the on/off Elstree. WD6 3TJ United Kingdom
button (1) on the front of the radio.
Tel +44 208 236 0032
2. When the radio has passed its diagnostic tests, info@entel.co.uk
A it will emit a fanfare tone.
Declare under our sole responsibility that the
3. The radio will enter standby mode. This is
indicated by the LED Amber flashing once
product ranges specified below conform to HT544 | HT844 | HT944
the following standards or other nominative
every 5 seconds, signalling that the radio is documents;
B ready for use.
HT544, HT844 V2 series, HT944 V2 series,
4. Adjust the volume control (2) to select the
desired volume level.
EN 301 178-2 V1.2:2007 Quick Start User Guide
EN 60945:2002
5. Using the channel buttons (3) ensure you have EN 60950-1:2006 in accordance with
the correct channel selected. Directive 1999/5/EC
6. When receiving a valid signal, the LED will This declaration is valid for Directive 94/9/EC
illuminate steady green and audio will be until 19 April 2016
emitted from the radio’s speaker or audio This declaration is valid for Directive 2014/34/
accessory (if attached) EU from 20 April 2016
1. To attach, carefully align the aerial with
the socket. Screw in the aerial clockwise 7. When finished using the radio, switch off HT544, HT844 V2 series, HT944 V2 series
(taking care not to cross the thread) until it by pressing and holding the on/off button EN 60079-0:2012
is seated firmly with the accessory cover’s (1) until the radio beeps and the LED/LCD is EN 60079-11:2012
rubber ring between the aerial and the top extinguished. Related certificates:
of the radio. (A)
HT844 V2 series, HT944 V2 series
2. To remove, unscrew the aerial anti-clockwise. TRANSMITTING Sira 10ATEX2066X
(B) HT9XX marking Ex ll 2 G Ex ib llC T4 Gb
1. Perform steps 1 through to 5 of Switching On,
HT8XX marking Ex ll 2 G Ex ib llA T4 Gb
Attaching / removing the battery pack Reception and Switching Off.
HT544
2. Before transmitting, monitor the channel
C and make sure it is clear. IECEx SIR 10.0097X

3. When receiving a signal, wait until the signal Marking Ex ll 2 G Ex ib llA T4 Gb

stops before transmitting. The transceiver Sira Certification. Unit 6, Hawarden Industrial
cannot transmit and receive simultaneously. Park,Hawarden, Deeside. CH5 3US, UK
Notified Body No. 0518
4. Press the PTT (Push To Talk) button (4) to begin
your transmission. To confirm transmission the
Quality Assurance Notification:
LED illuminates red.
D Intertek. Intertek House, Leatherhead
5. For best transmitted speech quality, you must KT22 7SB, UK
talk directly into the radio’s microphone (9) at Notified Body No. 0359
around 4cm between your mouth and the radio
1. To attach, locate the pegs on the bottom of the complete, the charger.
battery into the slots on the radio and press Name: Mike Jamieson
6. Please note: if you talk into the top of the
the top of the battery against the radio. Secure Position: Quality Manager
radio or with your mouth further away, you will
battery by tightening the screw clockwise Date: 1st December 2015
transmit poor quality speech.
by hand. (Do not use any implement or
overtighten). (C) 7. When the transmission is finished release the Signed:
PTT button.
2. To remove, unscrew the locking screw
anti-clockwise and pull the battery away
from the top of the radio. (D)

www.entel.co.uk Designed in the United Kingdom

 Quick Start User Guide V2.1 CONTROLS & INDICATORS

HTx44 Series
HT544 | HT844 | HT944 Above approvals apply to specific models only 1. On/Off button. Press and hold to turn the radio on or off

INTRODUCTION BATTERY INFORMATION 2. Volume control

The Entel HTx44 series are a range of professional IP68 submersible Battery charging 7 KEY LCD
marine handheld transceivers that operate on the VHF marine band. They 1. Connect the AC adapter to the charger pod and plug in. 3. Channel up / down buttons
have 56 marine international channels and 36 dealer programmable private
channels. 2. Turn the transceiver off. 4. Push To Talk (PTT) button. Press to speak and release to listen
This quick guide provides basic guidance for operating your radio. 3. Insert the battery pack into the charger pod, either with or without the
A full version of this user guide is available to download from our website. transceiver attached. The charger LED status light changes to red and 5. Dealer programmable button (ask your dealer for more information).
www.entel.co.uk. charging begins.
4. When charging is complete, the charger status LED changes from red 6. LED Indicator
To meet your exact requirements the radio may have been customised by
your Entel dealer. These features will be explained in a separate guide to green (a fully discharged battery pack will take approximately 6 hours
to recharge). Red steady - Transmitting
issued by the dealer.
A flashing red LED on the charger indicates there is a problem with the 7 2 Red flashing slowly - Battery needs recharging
PACKING LIST battery. Remove the battery from the charger and consult your Entel Dealer.
Green - Receiving
HTx44 Marine VHF transceiver
CAUTION 7. Change channel mode from INT/USA/CAN
CNBxxx Rechargeable Li-Ion battery 6
BATTERY PACK PRECAUTIONS 8. MEM Button: Adds or removes the currently selected channel to or
CBH950 Spring loaded belt clip 5
• 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 form the scan list
CCAHT Trickle charger pod
be damaged. 4
CAT40 High efficiency antenna SCAN Button: Starts/stops scanning the channels added to the scan
• After charging is complete, remove the battery from the charger. If the 3
power to the charger is turned off and on again, charging will restart and list plus CH16
CWCHT Mains adaptor the battery will become overcharged. 5
• Please ensure that the radio is turned off before placing it in the charger 16 Button: Toggles between the currently selected channel and
OPTIONAL ACCESSORIES and never switch a radio on whilst in the charger. 1
Attaching and removing accessories • Only use Entel branded battery pack and chargers. channel 16
To attach an accessory, remove the accessory cover by unscrewing the 8
• Do not short the battery terminals or dispose of the battery in a fire.
locking screw anti-clockwise (leave the cover attached or store in a safe MON Button: Short press momentarily opens squelch. Long press
• Do not charge the transceiver and/or battery pack if they are wet. e
place). kH r latches squelch open (short press re-sets)

e
Tal
Plug the accessory into the socket, then carefully 9
DANGER
tighten the locking screw clockwise until finger tight 9. Microphone
(do not overtighten or use any implement) DO NOT DISASSEMBLE OR MODIFY THE BATTERY IN ANY WAY!
To remove an accessory, unscrew the locking Your Entel battery pack incorporates safety circuitry to avoid danger. If the
screw of the accessory by hand in an anti-clockwise safety circuitry is damaged or bypassed, or the battery cells are damaged
direction. directly, they may generate extreme heat, smoke, rupture and emit flames.
Ensure you re-fit the accessory socket cover (the
radio is not submersible without the socket covered)
 Introduction Preparing Your Radio For Use
The HT54x are professional marine handheld transceivers that operate on the VHF marine band. Attaching / Removing the Aerial
The HT544 has 58 international marine channels and 36 dealer programmable private channels. The 58 1 2
marine channels are switchable to comply with International, USA or Canadian regulations, which can be 1 To attach, carefully align the aerial with the
Common

Common
done directly via the radio’s keypad using the screen’s LCD. It has an emergency channel, which can be socket. Screw in the aerial clockwise (taking care
immediately selected from any channel using the 16 button. The HT542 has 16 channels within the marine not to cross the thread) until it is seated firmly
band. with the accessory cover’s rubber ring between
The HT54x commercial grade HT Series 2.0 portables utilise the latest intelligent Lithium-Ion battery the aerial & the the top of the radio.
technology and includes the following features: scan, battery life indicator, VOX (voice operated transmit)
and low battery indicator. 2 To remove, unscrew the aerial anti-clockwise.

Packing List
• HT54x Transceiver • CATXX Antenna
• CNB550E Rechargeable 1800mAh Li-Ion battery • CCA trickle charger included with certain models Attaching / Removing Audio Accessories
• CBH750 Spring loaded belt clip
3 To attach, remove the accessory cover by unscrewing the locking
Radio Care screw anti-clockwise (leave cover secured under
antenna as this provides a waterproof seal). Attach accessory
Warranty Cleaning your Radio plug by locating over the socket. Carefully tighten the locking
The HT54x comes with a 24 month warranty, After exposure to any potentially corrosive substance screw clockwise until finger tight (do not tighten with a
for details see our full terms & conditions. including salt water it is recommended to thoroughly wash screwdriver etc).
Advice the transceiver in fresh water. If washing with the battery
• Do not use options or accessories not
removed from the radio, ensure that the battery is not
immersed in water & that the accessory cap is attached &
4 To remove, unscrew accessory plug the locking screw by hand
specified by Entel in an anti-clockwise direction (carefully use a coin or
clean only with a damp cloth.
• Ensure that the radio is used within the screwdriver if too tight). Ensure you re-fit the accessory
parameters for which it was designed Note: Do not waterproof cover so as to protect the accessory socket.
• Please switch the transceiver off before wash the
connecting optional accessories transceiver if
Warning you suspect the
Turn the transceiver off in the following locations: waterproofing
• In explosive atmospheres (flammable gas, dust
Attaching / Removing the Belt Clip
seal may be
including metallic & grain powders etc) damaged. Please
5 To attach, slot the clip onto the slot on the
• Whilst taking on fuel or while parked near a fuel return to your
station back of the battery and slide up until you hear a
supplier for
• Near explosives or blasting sites a “click”
inspection /
• In aircraft, medical institutions or near persons
known to be wearing a pacemaker
repair. 6 To remove, pull the tab towards the belt clip
Caution (a). Then slide the belt clip downwards (b)
• Do not disassemble or modify the transceiver b
for any reason End of Life Disposal
• Do not transmit while touching the antenna
When your Entel transceiver reaches the end of its useful life,
terminal or any exposed metallic parts of the
please ensure that the unit is disposed of in an environmentally
aerial as this may result in a burn
friendly way. For country specific information please see
6
• Please check and observe regulations in your
country with regard to use whilst driving
www.entel.co.uk/recycling.
5
3 4
 Battery Care / Information Battery Care / Information
Introduction • Do Not immerse the battery in water unless Battery Charging This process will need to be repeated if the
attached securely to the radio or get it wet battery is allowed to completely discharge in
Your Entel radio is supplied with a high 1. Connect the AC adapter to the charger
by other means the future. In normal use this is unlikely.
performance Lithium-Ion (Li-Ion) battery.
Common

Common
• Use only the specified charger and observe pod. The LED status light will illuminate
These batteries:
charging requirements green indicating ready for charge Battery Indicator
• Extend talk time 2. Turn the transceiver off
• Do Not pierce the battery with any object For your safety and con-
• Reduce the battery’s size and weight 3. Insert the battery pack into the charger
or strike it with an instrument venience your
• Do not suffer from ‘memory effect’ that
• Do Not use the battery pack if it is damaged pod, either with or without the transceiver continually
reduces the life of Ni-Cad and NiMH batteries
in any way transceiver attached. The LED status light monitors the battery pack and gives an
• Have a low toxicity, therefore reducing the
impact on the environment
• Do Not reverse-charge or reverse connect changes from green to RED & trickle indication on the LCD:
the battery charge begins • 3 Segments: 12 hours
• Do Not touch a ruptured or leaking battery. 4. A fully discharged battery pack will take
Battery Pack • 2 Segments: 1 hour
approximately 6 hours to charge, • 1 Segment: 20 mins
• If a battery is not to be used for an extended If liquids from the battery get into your eyes, depending on the remaining power
period of time (e.g. several months) remove immediately: condition. When charge is complete, the
the battery pack from the equipment and Note: Only genuine Entel batteries should be
• Wash your eyes out with fresh water & LED status light turns green. used. Customer satisfaction is assured as you
store in a cool and dry location (around avoiding rubbing them.
0°C) part charged. can not be supplied with sub standard,
• Seek medical treatment. Overcharging: potentially dangerous battery packs from 3rd
Do not fully discharge the battery before
storage The battery pack has an over-current party manufacturers, ensuring it delivers the
• Each charge cycle reduces the battery’s life. Attaching / Removing the Battery Pack protection circuit fitted. When charging a expected capacity and endurance.
Minimise the number of times you charge completely discharged battery i.e. first charge,
your battery especially in hotter environ- 1 To attach, locate the pegs on the bottom of the
ensure the battery is removed from the radio On HT series batteries a breathable
ments which further shortens a battery’s life battery into the slots on the radio and press and then re-attached (if fitted to radio when membrane is used. This is clearly marked on
the top of the battery against the radio. Secure charging). This will reset the protection the battery label. Piercing the membrane will
Battery Pack Precautions battery by tightening the screw clockwise by allow water ingress to the battery, & will
circuitry and ensure normal operation.
hand. (Do not over tighten) invalidate the warranty.
• Switch the transceiver OFF before charging
• Charge the battery pack before use 2 To remove, unscrew the locking screw
• Do not recharge the battery pack if it is anticlockwise & pull the battery away from the

•
already fully charged.
Charge the battery in accordance with the
instructions enclosed with your charger 1
top of the radio.
2
Optional Accessories
• Do not charge the transceiver and /or
battery pack if they are wet. Attaching & Removing Accessories
To attach an accessory: Remove the accessory cover by unscrewing the
The battery pack includes potentially locking screw anti-clockwise (leave cover attached or store in a safe place).
hazardous components. Please: Attach accessory plug to the socket. Carefully tighten the locking screw
• Do Not disassemble or reconstruct battery clockwise until finger tight (do not tighten with a screwdriver etc).
• Do Not short-circuit the battery
• Do Not incinerate or apply heat to the To remove an accessory: Unscrew the locking screw of the accessory by
battery 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.

5 6
 Optional Accessories
HT542
Battery & Charger Options
CNB550E Spare intrinsically safe approved 1800mAh Lithium-Ion battery pack with rear clip Standard Features:
CSAHT 1-way intelligent rapid charger, 100-240v • 16 programmable channels
Common

CSBHT 6-way intelligent, rapid charger, 100-240v

• Top mounted monitor button
CCAHT-230 1-way trickle charger with 230V mains adapter
CCAHT-110 1-way trickle charger with 110V mains adapter • CTCSS & DCS (analogue & digital squelch) with squelch tail elimination (removes the ‘shh’ noise)
CCAHT-12 1-way trickle charger with cigar lighter lead, 12V DC operation • Exceptionally loud and clear audio
• Robust design, exceeds MIL-STD-810C/D/E/F
Carry Options
• Environmentally protected to IP68 i.e. submersible to 5 metres for up to 60 minutes
CLC952 Heavy duty black leather case with strap & belt loop
•

HT542
1800mAH Lithium-Ion battery for superior operational time
CLC953 Heavy duty black leather case with strap & belt loop
CLC956 Heavy duty black leather case with strap & belt loop • Full band switching allows access to all channels in each band
CBH750 Spare spring loaded belt clip • Battery charge count
• Radio cloning mode
Audio Accessory Options
• Low battery alert indicates when the battery needs recharging
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* Dealer programmable features:
EA15/950 Earpiece microphone with transparent acoustic tube & VOX* • VOX for hands free operation
EA19/950 D-shaped earpiece with boom microphone and in-line PTT & VOX* • High / Low transmit power
EHP950 D-Shaped earpiece (connects directly to radio)
• Normal & priority scan (programmable per channel position)
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* • Panic (personal attack) button causes high pitch, high volume, siren tone to be emitted from the
radio’s speaker
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* • Key lock button
CHP950BT Bluetooth double earpiece headband defender headset with boom mic & ear cup PTT • Prefixed minimum volume level and fixed bleep level
* VOX = Voice Operated Transmit (hands free operation) • Talkaround (allows communication away from a base station)
Bluetooth option board in radio is required to use Bluetooth audio accessories. • Transmit time out-timer (ensures channels are not blocked)
• Voice scrambler with 1 code per channel (option)
Antenna Options
CAT10S-78 78MHz compressed antenna • Automatic power save to further increase operational time
CXW640 Antenna adapter for external aerial
CAT10S-85 85MHz compressed antenna • User adjustable squelch level
CAT20 Helical antenna VHF
CAT10S 66-88MHz uncut compressed antenna
CAT80 Whip antenna UHF
CAT700-40 30-50MHz antenna
CAT20S Stubby antenna VHF
CAT80S Stubby antenna UHF
For complete up to date list of optional accessories visit www.entel.co.uk

Note: The use of non Entel approved accessories will invalidate your intrinsically safe
approval. Refer to certificate Sira 10 for permitted accessories.

7 8
 Controls & Indicators HT544
7 Dealer Standard Features:
3 Channel / Scan
programmable • Environmentally protected to IP68 i.e. submersible to 5 metres for up to 60 minutes.
button 3 control
Antenna
• Robust design, exceeds MIL-STD-810C/D/E/F.
• LCD screen to display channel number & current settings \ status.
5 Dealer • 1800mAH Lithium-Ion battery for superior operational time.
programmable 8 LED indicator • INT, USA, CAN channels.
button 1
• Full transmit power output 5 Watts.
• Exceptionally loud & clear audio .
H542

4 Push To Talk • Ch 16 \ 9 shortcut button.

(PTT) button • WX shortcut button.

2 Volume control • Scan button.

6 Dealer • Monitor button.
programmable • MEM button.
button 2

HT544
Speaker • Automatic power save to further increase operational time.
• Low battery alert indicates when the battery needs charging or replacing.
1 On / Off • Battery charge count to indicate when a battery needs replacing.
Microphone

Dealer Programmable Features:

1 On / Off button. Press to turn radio on, press and hold to turn off. • Key lock button
• Prefixed minimum volume level and fixed bleep level
2 Press up / down buttons to increase / reduce volume.
• VOX (Voice Operated Transmit) Function.
3 Channel / Scan control. Rotate to select the desired channel or scan setting.
4 Push To Talk (PTT) button. Press to speak and release to listen.
5 Dealer programmable button 1 (ask your dealer for more information).
6 Dealer programmable button 2 (ask your dealer for more information).
7 Dealer programmable button 3 (ask your dealer for more information).
8 LED indicator.
• RED steady = Transmitting
• RED flashing slowly = Battery needs re-charging
• GREEN steady = Receiving
• YELLOW steady = Non valid signal detected
• YELLOW flashing rapidly = Scanning

9 10
 Using Your HT544 Channels
Turning The Radio On & Off INT, USA & Canadian Modes
Turn the ON/OFF control on the top of the radio clockwise until the LCD iluminates & a short In compliance with worldwide license regulations the following versions of HT544
beep is emitted. To turn the radio off turn the ON/OFF control anti-clock wise until the LCD are available:
deluminates. Version A: INT, USA & Canadian modes
Using Your radio Version B, C & D: INT mode only
Before using your radio you may need to adjust the volume on the radio to take in to account 1. In the case of version A only; to change the channel set of the transceiver, hold down the
background noise. Adjust the volume using the rotary control on the top of the radio. [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.

Reception NOAA Weather Channels

(Applicable to version A model only)
1. Turn the transceiver on by rotating the volume control in a clockwise direction. A power on tone 1. To receive a weather channel, press the [WX] key. The transceiver enters into weather
is generated after 1 second to indicate the transceiver has passed its self-diagnostic test. During channel mode.
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 2. There are 10 weather channels. Use the & buttons to select the desired channel.
clockwise. After power-on, the transceiver will always default to the last channel selected. 3. To exit from the weather channels press the [WX] key. The transceiver recalls the previous
HT544

HT544
2. Turn the squelch control fully counter clockwise, then rotate clockwise until the white noise stops. working channel.
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 Emergency Channels
exceeds the squelch threshold.
To select the emergency channel, press the [16/9] button from any channel. Channel 16 appears
3. Select the desired channel using the [UP/DOWN] buttons. A full listing of channels can be found
on the display.
on page 17-18. Sometimes, a slight adjustment of the squelch threshold is needed as some
channels have a higher noise level than others. To recall the previous channel used, press the [16/9] button once again.
4. When receiving a signal the LED indicator illuminates green. An “RX” is also displayed on the
LCD. Channel 9
Channel 9 is used as a hailing channel for initial, non-emergency contact with other vessels. Hold
Transmitting down the [16/9] key for 1 second to select channel 9.
To recall the previous channel used, press the [16/9] button twice.

1. Perform steps 1 through 3 of RECEPTION. Monitor Channels

2. Before transmitting, monitor the channel and make sure it is clear.
Press the blue monitor button on the top of the radio to defeat the squelch mute and release
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. button to mute radio. A long press (radio will beep) will hold the squelch mute open until
4. When receiving a signal, wait until the signal stops before transmitting. The transceiver cannot pressed again to cancel again to return to squelch mute.
transmit and receive simultaneously.
5. Press the [PTT] (Push-To-Talk) button to begin your transmission. To confirm transmission in Adjusting Squelch Threshold
progress the LCD indicator illuminates TX and the LED illuminates RED. Press the blue monitor button on the top of the radio and switch radio on. Use &
6. Hold the transceiver 1 inch from your mouth and speak slowly and clearly into the microphone.
buttons to adjust threshold (between 01 - 16, 01 is more sensitive & 16 is less sensitive). Press
7. When the transmission is finished release the [PTT] button.
MEM to store the setting.

11
12
 Channels Functions
SIMPLEX / DUPLEX CHANNEL USE The Scan Function
Your transceiver has been factory programmed in accordance with FCC (USA), Industry Canada
1. Select the desired channel to be scanned using the & buttons.
and International regulations. The mode of operation cannot be altered from simplex to duplex
2. Press the [MEM] button to store the channel in the transceiver’s memory. [MEM] is
or vice versa. Simplex or duplex mode is automatically activated, depending on the channel and
displayed on the LCD. This channel is now memorised to be scanned.
the channel set and whether USA, Canadian, or International mode is selected.
3. To add further channels, repeat steps 1 & 2.
Refer to the channel charts listed on pages 17-18 of this user manual.
4. To delete a channel from the transceiver’s scan list, press the [MEM] button on a channel
If you have a licence to use a specific simplex or semi-duplex channel, contact your dealer who
that displays the [MEM] icon until the icon disappears.
may be able to programme your channel using the transceiver’s private channel memory.
5. All channels programmed remain in the transceiver’s scan memory, even if the power is
switched off.
CHANNEL A/B INSTANT ACCESS 6. Adjust the squelch control until the white noise is eliminated.
For your convenience, two user assigned channels can be programmed for instant access. If the 7. To start scanning, press the [SCAN] key. The scan proceeds from the lowest to the highest
[A/B] key is pressed and no channel A or B has been assigned, a short beep will be heard. programmed channel number & stops on channels when a transmission is received.
8. To stop the scan at any time, press the [SCAN] key again.
PROGRAMMING A/B INSTANT ACCESS BUTTONS
1. Hold down the [A/B] key and turn on the transceiver. VOX (Voice Operated Transmit)
HT544

HT544
2. The letter A will appear on the display and dashes "_ _" indicate that no channel has been
Press the [MEM] button & switch the transceiver on. The VOX symbol & a "0" will flash. "0"
designated channel A.
indicates VOX is switched off, 1 is for low sensitivity, 5 is for normal sensitivity, and 9 is for high
3. Press the [UP/DOWN] button until the desired channel number is displayed.
sensitivity. Use the [UP/DOWN] button to select the desired level, press [MEM] to
4. With the desired channel number displayed, press the [MEM] key once. The "A" will stop
confirm, the transceiver is now set to VOX. To switch VOX off, go back into VOX programming
flashing, indicating that the displayed channel is now designated channel A.
mode by holding the [MEM] key whilst switching on. Press the UP/DOWN button until the vox
5. Press the A / B button again. The letter "b" will appear on the display.
level is "off" and press [MEM] to confirm.
Repeat steps 2 through to 4.
In VOX mode the transceiver will react to your voice, and transmit automatically without you
6. Switch transceiver off and on to exit this mode and save changes. If you wish to clear instant
having to press the PTT button. There is always a slight delay for the electronic switching &
access channels follow step 1 then press the [MEM] key. The “A” will flash. Now switch the
consideration will need to be given. To get optimum performance from the VOX feature you
transceiver off and on again.
should use a noise cancelling headset or earpiece microphone (see accessory options).
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 14
 Controls
LCD Indicators

Indicator Description
High power selected (5 Watts)

Low power (1 Watt).

The Radio is Transmitting.

The Radio is Recieving.

HT544

HT544
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.

1 Power & Volume Control: Powers the radio on and off and controls the volume.
Indicates the channel set for International. 2 The Microphone: Internal condenser microphone
3 Up / Down Buttons: Press up / down buttons to change channel.
NOAA weather channels selected (USA & Canadian waters only). 4 16/9 Button: A momentary press of the button selects channel 16 and a longer press
select channel 9.
A ship-to-ship channel (in USA or Canadian mode). 5 WX Button: Immediately recalls the weather channels.
6 Scan Button: Starts / Stops scanning the memorised channels.
Battery life indicator. 7 The MEM Button: Memorises a desired channel for scanning.
8 The A/B Button: Provides Instant access to preassigned channels (if programmed)
Indicates keypad is locked, excluding the PTT, H/L & LAMP buttons. 9 Speaker: The Radio’s Speaker.

Private channel number selected.

Duplex channel selected (not simplex).

15 16
 Controls Troubleshooting
SYMPTOM PROBABLE CAUSE REMEDY
Battery needs charging or Charge the battery pack
Transceiver not switching on
battery is exhausted replace the battery pack
Use the MEM key to enter
desired channels into scan
The scan key does not start No channels memorised memory. Adjust the squelch to
the scan (MEM) Squelch is not adjusted threshold or to the point
where the white noise just
disappears.
Cannot change any function Key lock is switched on Turn key lock off
Defective battery or charger.
The LED on the charger does Contact your dealer Clean
Dirty terminal contact on
not illuminate when charging contacts with dry clean cloth
battery or charger
No transmit or cannot select Some channels are low power Change to high power channel
HT544

HT544
high power only Battery pack exhausted Charge / replace the battery
Hold MEM button for 2 secs,
Transceiver transmits without
use UP or DOWN button &
pressing PTT button Buttons VOX has been enabled
select “off” to turn VOX
seem to work intermittently
off

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.

17 18
 Channel Chart Channel Chart
Channel Set Frequency Channel Set Frequency
CH S/D Channel Use CH USA CAN INT S/D Receive Transmit Channel Use
USA CAN INT Receive Transmit
1A X S 156.05000 PORT OPERATION AND COMMERCIAL 22A X X S 157.10000
1 X X D 160.65000 156.05000 PUBLIC, PORT OPERATIONS 22 X D 161.70000 157.10000 PORT OPERATION, SHIP MOVEMENT
2 X X D 160.70000 156.10000 PUBLIC, PORT OPERATIONS 23A X S 157.15000 U.S. GOVERNMENT ONLY
3A X S 156.15000 US GOVERMENT, COAST GUARD 23 X X D 161.75000 157.15000 PUBLIC CORRESPONDENCE
3 X X D 160.75000 156.15000 PUBLIC, PORT OPERATIONS 24 X X X D 161.80000 157.20000 PUBLIC CORRESPONDENCE
4A X S 156.20000 COMMERCIAL FISHING 25 X X X D 161.85000 157.25000 PUBLIC CORRESPONDENCE
4 X D 160.80000 156.20000 PUBLIC, PORT OPERATIONS 26 X X X D 161.90000 157.30000 PUBLIC CORRESPONDENCE
5A X X S 156.25000 PORT OPERATIONS,VTS IN SEATTLE 27 X X X D 161.95000 157.35000 PUBLIC CORRESPONDENCE
5 X D 160.85000 156.25000 PUBLIC, PORT OPERATIONS
28 X X X D 162.00000 157.40000 PUBLIC CORRESPONDENCE
6 X X X S 156.30000 INTER-SHIP SAFETY
37 X S 157.85000 MARINA CHANNEL
7A X X S 156.35000 COMMERCIAL
60 X X D 160.62500 156.02500 PUBLIC \ PORT OPERATIONS
7 X D 160.95000 156.35000 PUBLIC, PORT OPERATIONS
61A X X S 156.07500 -
HT544

HT544
8 X X X S 156.40000 COMMERCIAL (INTER-SHIP ONLY)
61 X D 160.67500 156.07500 PUBLIC \ PORT OPERATIONS
9 X X X S 156.45000 BOATER CALLING CHANNEL
62A X S 156.12500 -
10 X X X S 156.50000 COMMERCIAL / INTERSHIP
62 X D 160.72500 156.12500 PUBLIC \ PORT OPERATIONS
11 X X X S 156.55000 COMMERCIAL / PORT OPERATIONS
63A X S 156.17500 PORT OPERATIONS
12 X X X S 156.60000 PORT OPERATION
63 X D 160.77500 156.17500 PUBLIC \ PORT OPERATIONS
13 X X S 156.65000 INTER-SHIP NAVIGATION SAFETY
64A X X S 156.22500
13 X S 156.65000 INTER-SHIP NAVIGATION SAFETY
64 X X D 160.82500 156.22500 PUBLIC \ PORT OPERATIONS
14 X X X S 156.70000 PORT OPERATION
15 X R 156.75000 - SHIP MOVEMENT 65A X X S 156.27500 PORT OPERATIONS

15 X X S 156.75000 SHIP MOVEMENT \ INTERSHIP 65 X D 160.87500 156.27500 PUBLIC \ PORT OPERATIONS

16 X X X S 156.80000 INTERNATIONAL DISTRESS 66A X S 156.32500 PORT OPERATIONS
17 X X X S 156.85000 STATE CONTROLLED \ INTERSHIP 66A X S 156.32500 PORT OPERATIONS
18A X X S 156.90000 COMMERCIAL 66 X D 160.92500 156.32500 PUBLIC \ PORT OPERATIONS
18 X D 161.50000 156.90000 PORT OPERATION, SHIP MOVEMENT 67 X X S 156.37500 INTERSHIP
19A X X S 156.95000 COAST GUARD 67 X S 156.37500
19 X D 161.55000 156.95000 PORT OPERATION, SHIP MOVEMENT 68 X X X S 156.42500 NON-COMMERCIAL
20A X S 157.00000 PORT OPERATION 69 X X X S 156.47500 INTERSHIP
20 X X D 161.60000 157.00000 PORT OPERATION AND SHIPMENT 70 X X X R 156.25000 - DIGITAL SELECTIVE CALLING
20 X D 161.60000 157.00000 PORT OPERATION AND SHIPMENT 71 X X X S 156.57500 PORT OPERATIONS
21A X X S 157.05000 U.S. GOV, CANADIAN COST GUARD 72 X X X S 156.62500 NON-COMMERCIAL \ INTERSHIP
21 X D 161.65000 157.05000 PORT OPERATION, SHIP MOVEMENT 73 X X X S 156.67500 INTERSHIP

19 20
 Channel Chart Technical Specifications
Channel Set Frequency
CH S/D Channel Use GENERAL
USA CAN INT Receive Transmit
Frequency Range 156 - 163.275MHz
74 X X X S 156.72500 PORT OPERATIONS
75 X X S 156.77500 PORT \ GUARD CHANNELS Channel Spacing 25 kHz
76 X X S 156.82500 PORT \ GUARD CHANNELS Communication Method Simplex
77 X X S 156.87500 PORT OPERATIONS High Efficiency Helical
Antenna
77 X S 156.87500 PORT OPERATIONS \ INTERSHIP
50 ohm
Antenna Impedance
78A X X S 156.92500 NON-COMMERCIAL
Power Supply Voltage 7.4 V DC
78 X D 161.52500 156.92500 PUBLIC \ PORT OPERATIONS
8 Hours
79A X X S 156.97500 COMMERCIAL Battery Life
79 X D 161.57500 156.97500 PORT OPERATION, SHIP MOVEMENT Standby 40mA; RX: 390 mA; 1.0 W audio output (1kHz)
Current Drain (nominal) TX: Less than 1 A at 2W, 0.7 A at 1W.
80A X X S 157.02500 COMMERCIAL
TX: 10%, RX 10%, Standby: 80%
80 X D 161.62500 157.02500 PORT \ SHIP MOVEMENT Duty Cycle
81A X X S 157.07500 Microphone Internal condenser microphone
HT544

HT544
81 X D 161.67500 157.07500 PORT OPERATION Operating Temperature -20°C to 60°C
82A X X S 157.12500
Height = 130mm (145mm including knobs);
82 X D 161.72500 157.12500 PUBLIC \ PORT OPERATIONS
Size Width = 59.5mm (62mm including protrusions);
83A X X S 157.17500
83 X X D 161.77500 157.17500 PUBLIC CORRESPONDENCE Diameter = 37mm (41mm including battery protrusions);
84A X S 157.22500 PUBLIC CORRESPONDENCE
Weight Less than 300g.
84 X X X D 161.82500 157.22500 PUBLIC \ PORT OPERATIONS
85A X S 157.27500 PUBLIC CORRESPONDENCE
85 X X X D 161.87500 157.27500 PUBLIC CORRESPONDENCE
86A X S 157.32500 PUBLIC CORRESPONDENCE
86 X X X D 161.92500 157.32500 PUBLIC CORRESPONDENCE
87A X S 157.37500 PUBLIC CORRESPONDENCE
87 X X D 161.97500 157.37500 PUBLIC CORRESPONDENCE
87 X S 157.37500 PUBLIC CORRESPONDENCE
88A X S 157.42500 COMMERCIAL
88 X X D 162.02500 157.42500 PUBLIC CORRESPONDENCE
88 X S 157.42500 PUBLIC CORRESPONDENCE

Key:
• S = Simplex.
• D = Duplex.
• R = Receive Only.

21 22
 Technical Specifications Glossary of Terms
TRANSMITTER Term Description

Common
Canadian Channels designated as defined and regulated by Industry Canada, (RIC),
Frequency Range 156.025 - 157.425
Channels Marine Communications & Traffic Services.
Power Output Selectable: HIGH = 4W, LOW = 1W
Duplex Transmit and receive on different frequencies.
Modulation 16K0G3E
Encryption Scrambled audio for extra privacy.
Oscillator Method PLL
FM Frequency Modulation.
Frequency Stability ±2PPM
International Channel designations as defined for use in international waters by the
Maximum Deviation ±5 kHz Channels International Telecommunications Union (ITU).
Audio Distortion < 5% (1 kHz 60%) Marine Special channels reserved for marinas located in selected European
Spurious Emissiong -55db Channels countries. These channels are pre-programmed in the transceiver as P1 & P2.
Hum & Noise -40 [dB] Channels which are assigned by regulatory agencies governing VHF radio use
Private
for a specific region or country. These channels are prefixed with a "P" and
Channels
can only be programmed into the transceiver by authorised dealers.
HT544

RECEIVER PTT Press To Talk (Transmit)

156 - 163.275MHz RX Receive
Frequency Range
Receiver Type Double Super Heterodyne type Simplex Transmit and receive on the same frequency.
Sensitivity <0.25uV (12dB SINAD) Squelch To suppress background noise
Frequency Stability ±2PPM TX Transmit
Spurious Rejection -60 dB Transceiver A device that can transmit and receive
Adjacent Channel Selectivity -70 dB USA Channel designations as defined by the Federal Communications Commission
Distortion < 3% Typical Channels (FCCVOX )
Hum & Noise -40 dB VOX Voice Operated Transmit
Audio Output 1W VHF Very High Frequency (30MHz to 300 MHz)
Speaker Size 38 mm

23 24
 Notes 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.
Notes

Notes
25 26
 Certification
Certification
‘the
Ex ib IIA T4
professional’s
SAFETY NOTES
choice’
• 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

Copyright Entel UK Ltd. 2009

protection certification. <Intended Country Of Use>
• No unauthorised repairs are permitted.
• Radios fitted with a CNB550E battery pack must not be used outside of the ambient AT FR LT SK
temperature range Tamb = -20ºC to +28ºC
• Radios fitted with a CNB550E battery pack must not be used outside of the ambient
BE DE LU SI
temperature range indicated on the battery pack label. BG GR MT ES
CY HU NL SE
CZ IS NO CH
DK IE PL UK
EE IT PT
FI LV RO

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
Headquarters: United Kingdom www.entel.co.uk
27