Alinco DR-735T(2) User manual

DR-735T
Instruction Manual
Thank you for purchasing your new Alinco transceiver.
This Instruction manual contains important safety and operating instructions. Please read
this manual carefully before using the product and keep it for future reference.
VHF/UHF FM Transceiver DR-735T(2)
DR-735T(2)

NOTICE / Compliance Information Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15
of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference o radio or television reception, which can be determined by turning the equipment off and on, the user
encouraged to try to correct the interference by one or more of the following measure:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
VHF/UHF FM Transceiver DR-735T
This device complies with Part 15 of the FCC Rules. Operation is subject to the two conditions: (1) This device may
not cause harmful interference, and (2) this device must accept any interference received, including interference
that may cause undesired operation.
Manufacturer: ALINCO, INC
Yodoyabashi-Dai building 13th Floor 4-9, 5-Chome, Koraibashi, Chio-ku, Osaka 541-0043, JAPAN
Conformity Information
In case the unit you have purchased is marked with a CE symbol, a copy of relative conformity certificate or
document can be reviewed at http://www.alinco.com/usa.html. Please see the back-cover for more details.
Copyright © 2016 All right reserved. No part of this document may be reproduced, copied, translated or transcribed
in any form or by any means without the prior written permission of Alinco. Inc., Osaka, Japan. English Edition
Printed in Japan.
Changes or modifications not modifications not
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause
undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils
radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes :
(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
Alinco Incorporated Electronics Division
VHF/UHF FM Transceiver DR-735T(2)

1
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To prevent any hazard during operation of Alinco’s radio product, in this manual and on the
product you may fi nd symbols shown below. Please read and understand the meanings of
these symbols before starting to use the product.
Danger
This symbol is intended to alert the user to an immediate
danger that may cause loss of life and property if the user
disregards the warning.
Alert
This symbol is intended to alert the user to a possible hazard
that may cause loss of life and property if the user disregards
the warning.
Caution
This symbol is intended to alert the user a possible hazard that
may cause loss of property or injure the user if the warning is
disregarded.
Alert symbol. An explanation is given.
Warning symbol. An explanation is given.
Instruction symbol. An explanation is given.
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Do not drive while handling the radio for your safety. It is recommended that you
check local traffic regulations regarding the use of radio equipment while driving.
Some countries prohibit the operation of transceiver while driving.
Do not use this product in close proximity to other electronics devices, especially
medical ones. It may cause interference to those devices.
Keep the radio out of the reach of children.
In case a liquid leaks from the product, do not touch it. It may damage your skin.
Rinse with plenty of cold water if the liquid contacted your skin.
Never operate this product in facilities where radio products are prohibited for use
such as aboard aircraft, in airports, in ports, within or near the operating area of
business wireless stations or their relay stations.
Use of this product may be prohibited or illegal outside of your country. Be informed
in advance when you travel.
The manufacturer declines any responsibilities against loss of life and/or property
due to a failure of this product when used to perform important tasks like life-
guarding, surveillance, and rescue.
Do not use multiple radios in very close proximity. It may cause interference and/or
damage to the product(s).
Risk of explosion if battery is replaced with an incorrect type.
Dispose of, or recycle used batteries according to your local regulations.
The manufacturer declines any responsibilities against loss of life and property due to
a failure of this product when used with or as a part of a device made by third parties.
Use of third party accessory may result in damage to this product. It will void our
warranty for repair.

2
WARNING
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Be sure to reduce the audio output level to minimum before using an earphone or a
headset. Excessive audio may damage hearing.
Do not open the unit without permission or instruction from the manufacturer.
Unauthorized modification or repair may result in electric shock, fire and/or
malfunction.
Do not operate this product in a wet place such as shower room. It may result in
electric shock, fire and/or malfunction.
Do not place conductive materials, such as water or metal in close proximity to the
product. A short-circuit to the product may result in electric shock, fire and/or
malfunction.
Do not touch the heatsink (on/around the unit mostly found on mobile-base units) as it
may become very hot during/after the operation that may risk burn your skin.
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Use only appropriate, reliable and certified power supply of correct voltage and
capacity.
Do not connect cables in reverse polarity. It may result in electric shock, fire and/or
malfunction.
Do not plug multiple devices including the power-supply into a single wall outlet. It
may result in overheating and/or fire.
Do not handle a power-supply with a wet hand. It may result in electric shock.
Securely plug the power-supply to the wall outlet. Insecure installation may result in
short-circuit, electronic shock and/or fire.
Do not plug the power-supply into the wall outlet if the contacts are dirty and/or dusty.
Shortcircuiting and/or overheating may result in fire, electric shock and/or damage to
the product.
Do not modify or remove fuse-assembly from the DC-cable. It may result in fire,electric
shock and/or damage to the product.
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In case of the following situation(s), please turn off the product, switch off the source of
power, then remove or unplug the power-cord. Please contact your local dealer of this
product for service and assistance. Do not use the product until the trouble is resolved. Do
not try to troubleshoot the problem by yourself.
• When a strange sound, smoke and or strange odor comes out of the product.
• When the product is dropped or the case is broken or cracked.
• When a liquid penetrated inside.
• When a power-cord ( including DC-cables, AC-cables and adapters) is damaged.
For your safety, turn off then remove all related AC-lines to the product and its
accessories including the antenna if a thunderstorm is likely.
Turn off the unit, remove the mobile antenna from its base and keep it in the vehicle
if a thunderstorm is likely.
Please read cautions regarding the lightning-protection on page 9 also.

3
WARNING
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Do not open the unit and its accessories. Please consult with your local dealer of this
product for service and assistance.
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Do not use the product in proximity to a TV or a radio. It may cause interference or
receive interference.
Do not install in a humid, dusty or insufficiently ventilated place. It may result in
electric shock, fire and/or malfunction.
Do not install in an unstable or vibrating position. It may result in electric shock, fire
and/or malfunction when/if the product falls to the ground.
Do not install the product in proximity to a source of heat and humidity such as a
heater or a stove. Avoid placing the unit in direct sunlight.
Do not modify, dismantle, incinerate, or immerse the batteries. That may be used in
accessories you use with this product.
Please check your local regulations for details on recycling option or disposal of the
batteries in your area.
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Do not connect devices other than specified ones to the jacks and ports on the
product. It may result in damage to the devices.
Turn off and remove the power-source (AC cable, DC cable, battery, cigar-cable,
charger adapter etc) from the product when the product is not in use for extended
period of time or in case of maintenance.
Never pull the cord alone when you unplug AC cable from the wall outlet.
Use a clean, dry cloth to wipe off dirt and condensation from the surface of the
product. Never use thinner or benzene for cleaning.
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Use only reliable power supply of specific DC output range and be mindful of the
polarity of the cables and DC jack.
Always turn off the power supply when connecting or disconnecting the cables.
When using an external antenna, make sure that the antenna ground is not common
with the ground of the power supply.
European users: When a transceiver is powered from an external DC power source
(adapter, power supply, cigar-plug etc), make sure that this power supply has
approval to the level of IEC/EN 60950-1.

4
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• Do not remove the case or touch the interior components. Tampering can cause equipment
trouble.
• Do not use or keep the transceiver where it is exposed to direct sunlight, dusty places, or
near sources of heat.
• When transmitting for long periods of time at high power,
the transceiver might overheat. This product is NOT a
100%-duty transmitter.
• Turn the power off immediately if the transceiver emits
smoke or strange odors. Ensure the transceiver is safe,
then bring it to the nearest Alinco service center.
• An operator’s license is required for this device.
Notice to California resident users
The product that comes with this manual is free from dangerous material such as lead and
cadmium as per RoHS order of EU.
The transceiver has no protection against lightning.
The user is responsible for providing adequate protection if he/she uses the device at home
and installs the antenna outdoor. Be aware that any outdoor antenna creates a direct path for
lighting current (more than 10kA) to the transceiver. This path exists whether the device is
turned ON or OFF.
Any vehicle does not present a safe environment during lightning. This environment becomes
much more dangerous if an outdoor antenna is installed on the car. Move the antenna and its
cable into the car at the first sight of forthcoming thunderstorm and lightning.
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Thank you very much for purchasing this excellent Alinco transceiver. Our products are
ranked among the finest in the world. This radio has been manufactured with state of the art
technology and it has been tested carefully at our factory. It is designed to operate to your
satisfaction for many years under normal use.
PLEASE READ THIS MANUAL COMPLETELY TO LEARN ALL THE FUNCTIONS THE
PRODUCT OFFERS. WE MADE EVERY ATTEMPT TO WRITE THIS MANUAL TO BE
AS COMPREHENSIVE AND EASY TO UNDERSTAND AS POSSIBLE. IT IS IMPORTANT TO
NOTE THAT SOME OF THE OPERATIONS MAY BE EXPLAINED IN RELATION TO
INFORMATION IN PREVIOUS CHAPTERS. BY READING JUST ONE PART OF THE
MANUAL, YOU RISK NOT UNDERSTANDING THE COMPLETE EXPLANATION OF THE
FUNCTION.

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Thank you very much for purchasing this excellent Alinco transceiver. Our products are
ranked among the finest in the world. This radio has been manufactured with state of the art
technology and it has been tested carefully at our factory. It is designed to operate to your
satisfaction for many years under normal use.
PLEASE READ THIS MANUAL COMPLETELY TO LEARN ALL THE FUNCTIONS THE
PRODUCT OFFERS. WE MADE EVERY ATTEMPT TO WRITE THIS MANUAL TO BE AS
COMPREHENSIVE AND EASY TO UNDERSTAND AS POSSIBLE. IT IS IMPORTANT TO
NOTE THAT SOME OF THE OPERATIONS MAY BE EXPLAINED IN RELATION TO
INFORMATION IN PREVIOUS CHAPTERS. BY READING JUST ONE PART OF THE
MANUAL, YOU RISK NOT UNDERSTANDING THE COMPLETE EXPLANATION OF THE
FUNCTION.

6
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Carefully unpack to make sure the following items are found in the package in addition to this manual.
Transceiver EMS79 (with DTMF keypad)
BAND
BAND
MAIN
SCAN
MW
MW
V/M
H/L
V/M
MW
SET
MHz
SCAN
MHz
VOL
MAIN
VOL
SQL
SQL
(15A fuse)
DC power cable including 15A fuse and
holder
Mobile Mounting bracket
UA0038Y FM0078Z
Hardware kit for bracket Small (spanner) wrench
Bracket screws
AE0012
(M4 x 8mm) x 4
Screws
(M5 x 20mm) x 4
Hexagonal nut
(M5) x 5
Tapping screws
(M5 x 20mm) x 4
Instruction manual
The standard accessories may vary slightly depending on the version you have purchased.
Please contact your local authorized Alinco dealer should you have any questions.
Standard accessories may change without notice.
Warranty Policy
Please refer to any enclosed warranty information or contact your authorized Alinco dealer/distributor for the
warranty policy before purchase.

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Connect the microphone plug into microphone terminal on the
right side of control panel or into other microphone terminal in
front of MAIN unit. Insert the plug until hearing a click.
IMPORTANT When connecting, take care to the modular
plug direction.
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Connect antenna port to 50:antenna that covers 2m/70cm bands, using good quality 50:coaxial cable.
rear panel External speaker
(if used)
Microphone
Antenna
IMPORTANT
Coupling the antenna to the transceiver via feed-lines having impedance
other than 50:reduces the efficiency of the antenna system and can cause
interference to nearby televisions, radio receivers and other electronic
equipment.
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IMPORTANT
• Before connecting, be sure to turn off the transceiver and DC power
supply.
• Be certain to use DC cable provided with unit.
The transceiver requires 13.8V DC negative grounded power supply.
Use a regulated power supply capable of providing continuous current of 12A or more.
Power supplies that do not meet does specifications may cause malfunction and/or damage
to the radio and will void the warranty. Alinco offers excellent communication-grade power
supplies as optional accessories. Please contact your local authorized Alinco dealer.
VOL

8
Initial Installation
IMPORTANT
DC voltage range for operating this transceiver is DC 11.7V to 15.8V.
Transceiver will not operate out of this range. Inspect cable and connection
regularly to be sure there is not any damage or burning.
DC power cable
DC
power
supply
Black
lead
Red
lead
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The transceiver may be installed in any position in
your vehicle, where the controls and microphones
are easily accessible and it does not interference
with the safe operation of the vehicle or the
performance of the set. If your vehicle is equipped
with air bag, be certain your radio will not
interference with their deployment. If you are uncertain about where to mount the unit, contact
your vehicle’s manufacture.
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The main unit can be set with either side facing up. This can facilitate your ability to hear the
speaker’s audio clearly. Position the front panel as you prefer.
1. Slide the front panel while pulling the tab
toward yourself.
2. Turn the front panel, being careful to keep
the cable free from kinks.
3. Match the catch in the main unit with the
slot in the front panel and fit the front
panel into the main unit.
4. Slide the front panel unit until it locks
securely in place.

9
Initial Installation
1
2
4
4
5
⑤Slide the front panel unit until it
locks securely in place.
④Match the catch in the main unit with
the slot in the front panel and fit the
front panel into the main unit.
NOTE
By using the optional separation kit EDS-30, you can use the control and
the main unit in separate positions. The length of separation cable is 5m.
See page 75 for details.

10
Initial Installation
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Use a 50:coaxial cable to connect the antenna.
Mobile antennas require an appropriate mounting
base for proper installation and operation. For more
information, see the documentation for your
antenna.
IMPORTANT
After installing your antenna, ensure that you have the best possible SWR
reading. High RF environments can cause severe damage to your unit.
Ensure that you are not in a high RF environment when operating the
transceiver.
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1. Drill 4 holes where the mounting bracket
is to be installed.
. Approx. 5.5-6mm (1/4”) when using nuts; approx.
2-3 mm (1/8”) when using self-tapping screws.
2. Insert the supplied screws, nuts and
washers through the mounting bracket
and tighten.
3. Adjust the angle fort your suitable
position.
Magnet base
Screw-fixed base
<For making 4+/-0.2mm hole in
globe box bottom>
Car body
Mounting bracket
Tapping screw
Washer
VOL

11
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There are 3 types of key operations; simply press, press after pressing [FUNC] key while FUNC appears on
the display, or press and hold.
• [Press] refers to one time quick press and remove finger.
• [FUNC + this Key] refers to one time press [FUNC] key and then pressing this key while FUNC appears
on the display.
• [Press and hold] refers to press key and hold it. Hold timing is adjustable in set mode; however factory
default is 2 sec.
To confirm a parameter, [press any keys other than these keys] or [press microphone`s PTT switch] are
mentioned in this instruction manual. Quickest way to confirm parameters is pressing microphone’s PTT
switch.
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③
⑤
⑦
⑯
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④
②
⑥
①
⑩
Primary Functions
No. Key Function
APower Key Turns the power on/off. (P.19)
BLeft band [VOL] knob Rotate to adjust audio sound level on the left band. (P.19)
CRight band [VOL] knob Rotate to adjust audio sound level on the right band. (P.19)
DLeft band TX/RX indicator Indicates transmission (Red) or reception (Green) on the left band.
ERight band TX/RX indicator Indicates transmission (Red) or reception (Green) on the right band.
FLeft band [SQL] knob Rotate to adjust squelch level on the left band. (P.20)
GRight band [SQL] knob Rotate to adjust squelch level on the right band. (P.20)
HLeft band dial Rotate to select frequency, memory channel and various settings on the left
band.
IRight band dial Rotate to select frequency, memory channel and various settings on the right
band.
J[FUNC] key Sets functions.
KLeft band [V/M] key Switches between VFO mode and memory mode on the left band.
LRight band [V/M] key Switches between VFO mode and memory mode on the right band.
M[MW] key Press to select dual Memory mode.
Nkey Programmable function key.(P.63)
O[H/L] key Press to select Hi/Mid and Low output power. (P.33)
PMicrophone connector For connecting microphone.

12
Controls, Connectors, and Display
Functions that requires press and holding to be activated
No. Key Function
BLeft band [VOL] knob Switches between VHF/Air-Band and UHF on the left band (P.19)
CRight band [VOL] Knob Switches between UHF/VHF and Air-Band on the right band (P.19)
HLeft band dial Switches between VFO and memory scan on the left band. (P.58)
IRight band dial Switches between VFO and memory scan on the right band. (P.58)
J[FUNC] key Sets mode. (P.34)
KLeft-Band [V/M] key Switches to Call channel on the Left-Band. (P.30)
LRight-Band [V/M] key Switches to Call channel on the Right-Band. (P.30)
M[MW] key Simple Memory writing. (P.24)
O[H/L] key Key lock. (P.62)
* Hold timing is adjustable in set mode
Functions which can be activated while [FUNC] appears, after pressing [FUNC] key
No. Key Function
BLeft band [VOL] knob Switches to the single band mode on the left band. (P.57)
CRight band [VOL] knob Switches to the single band mode on the right band. (P.57)
HLeft band dial Program scan on the left band. (P.60)
IRight band dial Program scan on the right band. (P.60)
KLeft band [V/M] key Write frequency to selected memory on the left band. (P.23)
LRight-Band [V/M] key Write frequency to selected memory on the right band. (P.23)
M[MW] key Sets monitor function. (Reverse function when shift activated). (P.31)
Nkey Selects Tone-squelch (CTCSS) or DCS. (P.64)
O[H/L] key Accesses the digital voice communication mode (required optional unit) (P.66)
Functions which can be activated while pressing the [FUNC] key
No. Key Function
APower key Normal Reset when turns the power on. (P.73)
BLeft band [VOL] knob Selects shift or offset frequency on the left band. (P.22)
CRight band [VOL] knob Selects shift or offset frequency on the right band. (P.22)
HLeft band dial Sets priority scan on the left band. (P.60)
IRight band dial Sets priority scan on the right band. (P.60)
KLeft band [V/M] key Erase the memory while memory mode is selected on the left band. (P.25)
LRight band [V/M] key Erase the memory while memory mode is selected on the right band. (P.25)
M[MW] key Sets auto-dialer memory. (P.74)
Nkey Sets RGB backlight color. (P.63)
O[H/L] key Sets the channel name while Memory mode selected. (P.28)

13
Controls, Connectors, and Display
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④①②
⑥③⑤
No. Key Function
AExternal Speaker Jack 1 [SP1]
Connects an external 8:speaker. Output audio from right band. When
another speaker is not connected to [SP2], left band audio hear through
internal speaker. Also [SP1] used for connecting clone or PC cables.
BExternal Speaker Jack 2 [SP2]
Connects an external 8:speaker. Output audio from left band. When another
speaker is not connected to [SP1], right band audio hear through internal
speaker.
CDC Power cable Connects to the 13.8V DC power supply.
DAir-cooling fan Cools the unit during transmission or when radio is holding high temperature.
EAntenna connector Connects to antenna with 50:impedance matched with operation frequency.
FDIN connector (6 PIN) Connects to external TNC unit for Packet communications.
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Before operating, install an efficient, well-tuned antenna. The success of your installation will depend on the
type of antenna and its correct installation. Use a 50:impedance antenna and low-loss coaxial feed-line
that has a characteristic impedance of 50:, to match the transceiver input impedance.
Coupling the antenna to the transceiver via feed-lines having impedance other than 50:reduces the
efficiency of the antenna system and can cause interference to nearby televisions, radio receivers and other
electronic equipment.
NOTE
Transmitting without first connecting an antenna or other matched load may damage the
transceiver. Always connect the antenna to the transceiver before transmitting.
All fixed stations should be equipped with a lightning protection to reduce the risk of fire,
electric shock, and transceiver damage.
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• If you plan to use an external speaker, choose a speaker with an impedance of 8:. Each external speaker
jacks accept a 3.5mm (1/8") mono (2-conductor) plug.
• External speaker adopt double port BTL, please care about the connection. Do not use the speaker that
requires grounding.
• Carefully insert plug into jack. Do not twist the plug and do not apply stress on speaker jack.
• When jacks are not in use, keep the [SP] cap (speaker jack cover) closed to keep contacts clean and
avoid entering dust and other objects into the radio.
• Insert plug into jack completely until end to prevent damaging the jack or plug.

14
Controls, Connectors, and Display
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No. Key Function
AAppears when advanced set mode is available. (P.48)
BAppears during AM reception. (P.36)
CAppears during transmission when other band is set for mute. (P.52)
DAppears when APO function is activated. (P.49)
EAppears when setting the key lock. (P.62)
FAppears when [FUNC] key is pressed. (P.17)
GAppears when in the digital voice communication mode. (P.66)
HAppears when in packet mode. (P.55)
IAppears when cross-band repeater mode is available.
JAppears during time out timer setting. (P.49)
KAppears during short cut setting. (P.63)
LAppears when setting the shift. (P.22)
MAppears when setting the tone squelch. (P.64)
NAppears when setting the DCS. (P.65)
OAppears when attenuator function is activated. (P.44)
PAppears when in narrow band reception mode. (P.36)
HAppears when reverse mode is activated. (P.32)
IAppears when Bell function is activated. (P.39)
JIndicates the VHF/UHF frequency or memory name on the left band side. (P.20, 31)
KIndicates the VHF/UHF frequency or memory name on the right band side.
(P.20, 31)
LAppears on the band with transmitting ability. (P.19)
MAppears when a signal is being received. (P.31)
N[S] Flashes during scan and [PS] flashes during program scan. (P.58)
OAppears when transmission power is set to MID. (P.33)
PAppears when transmission power is set to LOW. (P.33)
QS meter Indicates received or transmitted signal level. (P.31, 32)
RAppears during scan for skip channels. (P.59)
SAppears when favorite channel is selected. (P.59)
TIndicates memory numbers in the memory mode. (P.23)

15
Controls, Connectors, and Display
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①②
③⑥
④⑤
No. Key Function
AUP Increase the frequency, memory channel number, or setting value.
BDOWN Decrease the frequency, memory channel number, or setting value.
CMAIN PTT Press the PTT (Push-To-Talk) key to transmit. Also press this key to confirm
your selection.
DSUB PTT Press the PTT (Push-To-Talk) key to transmit on sub band. Also used for other
functions depends on setting in set mode. (P.45)
ELOCK SWITCH Locks out the UP and DOWN keys.
FMIC Speak here during transmission.
Microphone Connector pin Assignment (Viewed from front of unit)
1.DC5V
2.DOWN
3.REMOTE
4.PTT
5.MIC GND
6.MIC
7.GND
8.UP
18
IMPORTANT
• Connect the microphone modular plug provided with the unit into microphone jack.
• Insert the plug until hearing a click. When connecting, take care to the modular plug
direction.
• When removing microphone from unit, press the lock on connector then pull the plug
out. Do not pull the microphone’s cable to remove the microphone from radio.
• When using optional EDS-8 (8 pin to modular convertor), fix EDS-8 cable on the
bracket to avoid stress on modular socket.
• Be careful to not mis-connecting separation cable to microphone’s modular socket.

16
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By press and holding the PWR key the power is turned on. By press and
holding the PWR key again, the power is turned off. To avoid accidentally turn
on/off, PWR key operation is designed for press and hold.
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In this instruction manual the MAIN band refers to the band which
selected for transmitting with MAIN icon on the display. To select MAIN
band press left or right volume knob. Press main PTT switch on
microphone to transmit on the MAIN band.
NOTE
For transmit on sub band without switching MAIN, set SUB-PTT switch on
EMS-78 microphone for TX in set mode. (P.45)
During memory scan (P.59), receiving band becomes MAIN band
automatically.
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Press and hold VOL knob for changing band (frequency). By
press and holding VOL knob, VHF->Air-Band VHF->UHF
appears on the display.
Also selecting same band for left and right is possible. (V-V or
U-U reception)
[AM] appears on the display when Air-band selected as factory
default setting.
IMPORTANT When V-V/U-U/V-Air-band is selected, during transmission on main band reception on sub
band becomes mute.
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The volume of the left band is adjusted by the left VOL knob
and the volume of the right band by the right VOL knob.
Rotate the VOL knob clockwise to increase the audio level,
counterclockwise to decrease.
PWR key
VOL knob
Low
Volume
High
Volume
Low
Volume
High
Volume
VOL knob for
left band
VOL knob for
right band

17
Basic Operations
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Adjust threshold level of the squelch. A squelch eliminates the
background noise when a signal is not received.
Turn the SQL knob clockwise until white-noise (the background
noise when a signal is not received) and [BUSY] icon on the
display disappears.
The SQL should be turned fully counterclockwise when receiving weak or unstable signals. The [BUSY] icon
appears on the display while the squelch is opened (unmuted).
When you set it to a higher level, weak signals would be interrupted while monitoring or would not be
monitored at all.
Generally, you should set the squelch to the lowest level where noise would be eliminated. Depending on the
monitored frequencies and the conditions of the circumstances around you, the squelch level may need to
be adjusted
NOTE
Attenuator function is available for SQL knob. (P.44)
low
SQL knob for
left band
VOL knob for
Right band
high low high

18
Basic Operations
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1. Be sure to have the unit connected to the
appropriate antenna, powered on, set the
audio volume and squelch level properly
on both the MAIN and SUB bands.
2. Select the desired band and browse
frequencies or select desired frequency
to listen to ongoing communications. The
S-meter shows relative signal strength
when the transceiver detects an incoming
signal, and the RX indicator lamp (green)
turns on.
3. If the S-meter indicates an incoming
signal but nothing is heard from the
speaker, check the audio level, squelch
level, and CTCSS/DCS decoding status,
which are explained elsewhere in this
manual.
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This function is used to listen to weak signals. The
monitor function operates irrespective of Tone squelch /
DCS functions setting.
Select desired band as MAIN. Press
FUNC key then press MW key while
[FUNC] appears on the display.
Regardless of the level setting of the squelch, it will be
opened; BUSY icon flash and RX lamp will turn on.
4. Press any key on the front panel to exit.
IMPORTANT The Monitor function only operates on the MAIN band.
S-meter