Yaesu Musen 50013X20 PORTABLE AIRBAND TRANSCEIVER User Manual FTA 750 FTA 550 FTA 450 Operating Manual

Yaesu Musen Co., Ltd. PORTABLE AIRBAND TRANSCEIVER FTA 750 FTA 550 FTA 450 Operating Manual

Contents

Operating Manual 1

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Document ID3339737
Application IDERLO0ZdZHqmW4FZFwehyHA==
Document DescriptionOperating Manual 1
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize187.99kB (2349896 bits)
Date Submitted2017-03-30 00:00:00
Date Available2017-06-28 00:00:00
Creation Date2016-11-17 10:27:36
Producing SoftwareAdobe PDF Library 10.0.1
Document Lastmod2016-11-17 10:27:49
Document TitleFTA-750/FTA-550/FTA-450 Operating Manual
Document CreatorAdobe InDesign CS6 (Windows)
Document Author: YAESU MUSEN CO., LTD.

FCC ID: K6650013X20
IC: 511B-50013X20
AIR BAND TRANSCEIVER
FTA-750
FTA-550
FTA-450
Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Contents
Important Notice!........................................................... 1
Introduction.................................................................... 2
Models, Accessories and Options............................... 3
Models................................................................................ 3
Supplied Accessories.......................................................... 3
Available Options............................................................... 3
Controls & Connectors................................................. 4
LCD Display................................................................... 8
Before You Begin......................................................... 12
Battery Installation and Removal..................................... 12
Battery Charging............................................................... 13
Alkaline Battery Tray Installation.................................... 14
Low Battery Indication..................................................... 14
External DC Power Supply Connection........................... 15
Antenna Installation.......................................................... 15
Belt Clip Installation......................................................... 16
Headset Connection.......................................................... 16
Precautions........................................................................ 17
Basic Operation........................................................... 18
Reception (COM Band).................................................... 18
Accessing the 121.5 MHz Emergency Frequency............ 21
Transmission (COM Band)............................................... 22
Operation Bands............................................................... 23
Operation Modes.............................................................. 24
Resetting the Radio........................................................... 25
Advanced Operation................................................... 27
Reception of VOR Signals (except for FTA-450)............ 27
Reception of ILS Signals (except for FTA-450)............... 31
Split Operation.................................................................. 33
Reception of Weather Channel Broadcasts....................... 35
Dual Watch Operation...................................................... 37
Timer Mode Operation..................................................... 39
TOT Feature...................................................................... 43
Saving the Battery during Reception................................ 43
Using the Headset Microphone........................................ 44
VOX Operation................................................................. 44
Side Tone Control............................................................. 45
Lock Function................................................................... 46
PTT Lock Function........................................................... 48
Changing the Channel Steps............................................. 48
ANL Feature..................................................................... 49
Memory Operation....................................................... 50
Recalling the Memories.................................................... 50
Instant Storage.................................................................. 52
Maintenance of the Memory............................................. 53
Scanning Operation.................................................... 57
Scanning Channels........................................................... 57
Selecting Scanning Band.................................................. 58
Scanning the Specified Channels...................................... 59
GPS Function (FTA-750 Only).................................... 61
Activating the GPS Unit................................................... 61
Displaying the Position Information................................. 62
Memorizing the Position Information.............................. 64
Recording the Position Information................................. 65
Waypoint Navigation (FTA-750 Only)......................... 66
Entering the Navigation (NAVI) Mode............................ 66
Setting the Destination...................................................... 67
Setup Mode.................................................................. 70
Basic Operation................................................................ 70
Maintenance of the Memory............................................. 71
Setting of the COMM Mode Operation............................ 72
Setting of the GPS Mode Operation (FTA-750 Only)...... 75
Setting of the Operation and Configuration of the Radio.80
About the Radio................................................................ 82
Summary of the SETUP Menu......................................... 83
Specifications.............................................................. 85
Troubleshooting for Headset Connection................. 87
FCC ID: K6650013X20
IC: 511B-50013X20
Important Notice!
FCC RF Exposure Compliance Requirements for Occupational Use Only:
The FTA-750/FTA-550/FTA-450 have been tested and comply with the Federal Communications Commission (FCC)
RF exposure limits for Occupational Use/Controlled Exposure Environment. In addition, both radios comply with the
following Standards and Guidelines:
 FCC 96-326, Guidelines for Evaluating the Environmental Effects of Radio-Frequency Radiation.
 FCC OET Bulletin 65 Edition 97-01 (1997) Supplement C, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio Frequency Electromagnetic Fields.
 ANSI/IEEE C95.1-1992, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency
Electromagnetic Fields, 3 kHz to 300 GHz.
 ANSI/IEEE C95.3-1992, IEEE Recommended Practice for the Measurement of Potentially Hazardous Electromagnetic Fields - RF and Microwave.
 This radio is NOT approved for use by the general population in an uncontrolled environment. This radio is
restricted to occupational use, work related operations only where the radio operator must have the knowledge to control its RF exposure conditions.
When
transmitting, hold the radio in a vertical position with its microphone 1 to 2 inches (2.5 to 5 cm) away

from your mouth and keep the antenna at least 1 inch (2.5 cm) away from your head and body.
 The radio must be used with a maximum operating duty cycle not exceeding 50%, in typical Push-to-Talk
configurations. DO NOT transmit for more than 50% of total radio use time (50% duty cycle). Transmitting
more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded.
The radio is transmitting when the “TX” icon is displayed on the upper left corner of the screen of the radio.
You can cause the radio to transmit by pressing the PTT button.
 Always use YAESU authorized accessories.
NOTICE
There are no user-serviceable points inside this transceiver.
All service jobs must be referred to your Authorized Service Center.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Introduction
The YAESU FTA-750/FTA-550/FTA-450 are compact, stylish, solid hand-held transceivers providing communication (transmit and receive) capability on the International Aircraft Communication Band (“COM” band: 118 to 136.975
MHz), and they additionally provide VOR and ILS navigation features on the “NAV” band (108 to 117.975 MHz).
The FTA-750/FTA-550/FTA-450 boast a 1.7” x 1.7” (43.2 x 43.2 mm) full dot matrix LCD displaying a plenty of information in a row. The FTA-750/FTA-550/FTA-450 include NOAA weather band monitoring and 200 memory channels. The channel configurations can be easily reprogrammed in minutes using the optional PC Programming Software
and your PC. In addition, the FTA-750 provides positioning and navigation features realized by the internal GPS unit.
We recommend that you read this manual in its entirety, so as to understand the many features of the FTA-750/FTA550/FTA-450 completely. Keep this manual handy, so you may use it for reference.
Note: The VOR, ILS, and GPS navigation features of the FTA-750/FTA-550 are for supplemental aids to navigation only, and are not intended to be a substitute for accurate (primary) VOR or landing service equipment.
You assume full responsibility for the use of the FTA-750/FTA-550.
Congratulations!
You now have at your fingertips a valuable communications tool, a YAESU two-way radio! Rugged, reliable
and easy to use, your YAESU radio will keep you in constant touch with your friends and colleagues for years to
come, with negligible maintenance or down-time.
Please take a few minutes to read this manual carefully. The information presented here will allow you to derive
maximum performance from your radio, in case questions arise later on.
We’re glad you joined the YAESU team. YAESU products cover the entire spectrum of radio communications
applications, and our worldwide support network is here to serve you. Let us help you get your message across.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Models, Accessories and Options
Models
FTA-750L Lithium-ion battery pack included
FTA-550L Lithium-ion battery pack included
FTA-450L Lithium-ion battery pack included
FTA-550 AA Battery Version
Rechargeable battery pack not included.
Requires “AA” batteries for operation.
Supplied Accessories
Lithium-ion Battery Pack (7.4V)
AC Charger
Charger Cradle
Cigarette Lighter DC/DC Converter
Helical Antenna
Belt Clip
Headset Adapter Cable
Alkaline Battery Tray
USB Cable
Ferrite Core
Operating Manual
Warranty Card
SBR-12LI*1
SAD-11*1
SBH-11*1
SDD-12
SRA-13A*2
SHB-11
SCU-15
SBT-12
T9101606
L9190192
Available Options
SSM-10A Speaker Microphone
SEP-10A	Earphone (available only with the SSM10A)
PC Programming Software
YCE01
(Download the YCE01 PC Programming
Software from the YAESU website.)
Availability of accessories may vary. Some accessories
are supplied as standard per local requirements, while
others may be unavailable in some regions. Consult
your YAESU Dealer for details regarding these and any
newly-available options.
Connection of any non-YAESU-approved accessory,
should it cause damage, may void the Limited Warranty
on this apparatus.
*1 These accessories are not supplied with the
FTA-550 AA Battery Version.
*2 Antenna gain: 2.15 dBi
Impedance: 50 ohms
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Controls & Connectors (Top Panel)
 Antenna Jack
This BNC connector accepts the supplied flexible
antenna, or an external antenna designed to provide
50 Ω impedance on the Aircraft Communication
Band.
VOL
DIAL
 VOLUME (Inner) Knob
Turn this (inner) control clockwise to increase the
volume.

 
 DIAL Selector (Outer) Knob
This (outer) 20-position detented rotary switch tunes
the operating frequency or selects the memory channels.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Controls & Connectors (Front Panel)
 LCD (Liquid Crystal Display)
 121.5 Key
 Microphone
 Loudspeaker
The display shows selected operating conditions, as
indicated on Pages 8 to 11.
Speak into this opening in a normal voice level,
while pressing the PTT switch, to transmit.
Press and hold this key to access the emergency
frequency (121.5 MHz) instantly.
The internal speaker is located in this position.
 Cursor Keys and ENT Key
The cursor keys [◄] and [►] are used to select an
item displayed on the LCD.
Press the ENT key to determine the selection or
entered values.
 Control Keys
Press the MENU key to display the MENU screen.
Press the BACK key to return the display to the
previous screen.
Press the SAVE key to store the current channel
information to the memory.
] to enable the
Press and hold the lock key [
lock feature. Controls and keys will be disabled.
Press and hold again to disable the lock feature.




 COMM Key
Press this key to enter the COMM mode instantly.
 Numeric Keypad
The keypad is used when setting frequencies.
FTA-750/FTA-550/FTA-450 Operating Manual




FCC ID: K6650013X20
IC: 511B-50013X20
Controls & Connectors (Left Side)
 POWER Switch
Press and hold this button to turn the radio on and
off.
 PTT (Push To Talk) Switch

MIC/SP
Press and hold this button to transmit when you are
operating in the COM band. Release this button to
return to the “Receive” mode. See Page 22 for details.
 SQL (Squelch) Switch
This button may be pressed to “open” the squelch
manually, allowing you to listen for very weak
signals. Press and hold this button for 2 seconds
to “open” the squelch continuously. Press this button again to resume normal (quiet) monitoring. See
Page 20 for details.
DATA
PTT


SQL
EXT
DC
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Controls & Connectors (Right Side)
You may connect the supplied SCU-15 Headset
Adapter Cable or the optional SSM-10A Speaker/
Microphone to this jack. To use this jack, you must
first remove the cover from the transceiver body.
Do not allow the FTA-750/FTA-550/FTA450 to get wet while the cover over the
MIC/SP jack is removed.
MIC/SP
 MIC/SP Jack

PTT

SQL
 DATA Jack
You may connect the optional USB cable to this
jack. To use this jack, you must first lift the rubber
cover away from the transceiver body.
Do not allow the FTA-750/FTA-550/FTA-450 to get wet while the rubber cover
is removed.
DATA
EXT
DC

 EXT DC Jack
When an external 9.5- to 10.5-Volt DC power
source is available, you may connect the SDD-12
Cigarette Lighter DC/DC Converter here.
1) Do not allow the FTA-750/FTA-550/
FTA-450 to get wet while the rubber cover
is removed.
2) Do not connect any accessory unapproved by
YAESU to supply DC power.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
LCD Display (COM Band)
“BUSY” icon appears during
audio reception, or “TX” during
transmission.
This field displays the
operation modes.
This field displays the
tag name of the current
channel.
This field displays the
operating frequency.
BUSY
DW
This field displays the
channels you have
previously used.
133.800
Los Angeles
MR
FLG
VOL
This field displays the
level of the audio volume
or the squelch.
This field displays the icons indicating
various statuses of the transceiver, such
as “GPS on”, “Data Logger on”, “Timer
on”, “Battery full”, etc.
V ±
MEM
132.400
134.800 MIAMI
127.600 MIAMI 2
119.150
124.250 North
129.200
This field displays the
icons indicating various
statuses of functions,
such as “VOX on”, “Split
on”, etc.
“MEM” icon appears if
the selected channel is
programmed into the Scan
Memory.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
LCD Display (NAV Band: Except for FTA-450)
VOR CDI Screen
NAV VOR
NAV VOR




113.600
KLAX-VOR
VOL
33 N
30
12
24
21
15
FTA-750








ILS CDI Screen
OBS
000°
355°
FROM
SOGKT
150

 
 



NAV LOC GS
113.600
KLAX-VOR
VOL
33 N
30
12
24
21
OBS
000°
355°
FROM



15

VOL
KLAX-RWY07R
33 N


30
12
24

21
FTA-550
Compass rose
Course indicator (OBS direction)
Deviation marks
Course deviation needle
OBS (omni bearing selector) value
VOR value
TO/FROM indicator
SOG (speed over ground) value according to the
GPS signal
15
FTA-750






NAV LOC
108.500
 
 

108.500
VOL
KLAX-RWY07R



FTA-550
Compass rose
Course (runway) indicator
Deviation marks for localizer
Course deviation needle for localizer
Height deviation indicator for glide slope
Deviation marks for glide slope
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
LCD Display (FTA-750 Only)
GPS Information Screen
GPS Compass Screen
BUSY
133.800
MR
FLG
VOL



KLAX-ATIS
BUSY
MR
FLG
LAT/LON
23°
56.890N
123°
56.890W
ALTM
COG
SOGKT
095° 095 0956.8
DATE Oct/25 09:56AM






10


MEM
Latitude and longitude values
COG (course over ground) value
Date obtained from the GPS signal
SOG (speed over ground) value
Altitude value







VOL
133.800 MEM
KLAX-ATIS
COG T
000°
SOGkph
360
ALTft
10000
Oct/25
09:56AM




Compass rose
Course indicator
COG (course over ground) value
SOG (speed over ground) value
Altitude value
Date obtained from the GPS signal
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
LCD Display (FTA-750 Only)
GPS Status Screen
BUSY
MR
FLG








VOL
Waypoint Navigation Screen
BUSY
133.800
MR
ALL
KLAX-ATIS
STATUS
SEARCH
LAT/LON
23°
56.890N
123°
56.890W





DATE Oct/25 09:56AM
GPS receiver operation status
Radar scope for captured GPS satellites
Date obtained from the GPS signal
Latitude and longitude values
GPS signal strength indicator







VOL
133.800
KLAX-ATIS
KLAX
DSTkm
10
COG T
000°
SOGkph
360




Compass rose
Course indicator
Destination indicator
Tag name of the destination
DST (distance) value
COG (course over ground) value
SOG (speed over ground) value
FTA-750/FTA-550/FTA-450 Operating Manual
11
FCC ID: K6650013X20
IC: 511B-50013X20
Before You Begin
Battery Installation and Removal
 To install the battery, insert the battery pack SBR12LI into the battery compartment on the back of
the transceiver, press the end of the battery pack
while pressing the battery pack latch on the bottom of the transceiver, then lock the pack by sliding
the locking plate beside the latch until the entire
“LOCK” appears.
Note:
Be sure that the rubber gasket on the SBR-12LI is
not loose when inserting.
Do not attempt to open any of the rechargeable Lithium-ion packs, as personal injury
or damage to the Lithium-ion pack could
occur if a cell or cells become accidentally shortcircuited.
Note:
To remove the battery pack after the belt clip SHB-11 is
mounted (see Page 16), lift up the clip before you press
the battery pack latch.
 To remove the battery, turn the transceiver off, slide
the locking plate until the “UNLOCK” appears entirely, lift up the end of the battery pack by pressing
the battery pack latch, then pull out the battery from
the radio.
/SP
MIC
EXT
DC
DATA
Battery Pack
Latch
12
US
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Before You Begin
Battery Charging
It is necessary to charge the Lithium-ion battery fully
before its first use. Follow the procedure below:
1. Install the Lithium-ion battery pack onto the transceiver. Ensure that the transceiver is switched off.
2. Insert the cable plug of the SAD-11 Battery Charger into the jack located on the back of the SBH-11
Charging Cradle, then plug the SAD-11 into the AC
line outlet.
MIC/SP
IA
TA
DA
SAD-11
EX
DC
SBH-11
3. Insert the transceiver into the SBH-11; the antenna
jack should be at the left side when viewing the
cradle from the front.
 You may insert the cable plug of the SAD11 into the EXT DC jack located on the right
side of the transceiver directly. In this case, the
“
” icon will appear in the top right corner
of the LCD display.
4. If the transceiver is inserted correctly, the RED indicator on the SBH-11 will glow.
 A fully-discharged pack will be charged completely in 4 hours, and then the GREEN indicator on the SBH-11 will glow.
 It takes 8 hours for full charge with the SAD11 connected to the transceiver directly.
Important Notes:
 The SAD-11 is not designed to power the transceiver for operation (transmission).
 Do not leave the charger connected to the transceiver for continuous periods in excess of 24 hours.
Long term overcharging can degrade the Lithiumion battery pack and significantly shorten its useful
life.
 If using a charger other than the SAD-11, SBH-11,
or if using a battery pack other than the SBR-12LI,
follow the appropriate instructions provided with
the charger/battery. Contact your Dealer if you have
any doubts about the appropriateness of the particular charger or battery pack you intend to use.
FTA-750/FTA-550/FTA-450 Operating Manual
13
FCC ID: K6650013X20
IC: 511B-50013X20
Before You Begin
Alkaline Battery Tray Installation
The supplied SBT-12 Battery Tray allows operation of
the FTA-750/FTA-550/FTA-450 using six “AA” size
alkaline battery cells.
 When installing a cell, insert the (–) end first, then
press in the (+) end so the cell snaps into place. Pay
attention to the polarity indicated inside the case.
Note: Be sure that the rubber gasket on the SBT-12
is not loose when inserting.
Low Battery Indication
As your battery discharges during use, the voltage will
gradually become lower. When the battery voltage
reaches 6.0 Volts, the “
” icon will blink on the
LCD display, indicating that the battery pack must be
recharged or the alkaline battery cells must be replaced
before further use.
SBT-12
Alkaline Battery Tray
The SBT-12 must not be used with rechargeable cells. The SBT-12 does not contain the thermal and over-current protection circuits required when utilizing Ni-Cd and NiMH cells.
Note: Replace all six cells at the same time in case of
low battery.
14
 To install the SBT-12, remove the Lithium-ion battery pack first from the transceiver, turn the open
side of the SBT-12 down, then insert it into the battery compartment.
 Avoid recharging Lithium-ion batteries before the
“Low Battery” indicator is observed, as this can
degrade the charge capacity of your Lithium-ion
battery pack. YAESU recommends that you carry an
extra, fully-charged pack with you so you will not
lose communications capability due to a depleted
Lithium-ion battery.
 The fully-charged battery lasts for 12 hours on the
FTA-750, 13.5 hours on the FTA-550 or ??.? hours
on the FTA-450 under the conditions below:
Battery saver ... OFF
Operation ratio ... TX:RX:Standby = 6:6:48 (sec)
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Before You Begin
External DC Power Supply Connection
You may insert the cable plug of the optional SDD-12
Cigarette Lighter DC/DC Converter into the EXT DC
jack located on the right side of the transceiver. In this
case, the “
” icon will appear in the top right corner
of the LCD display.
When making DC connections via the SDD-12, be absolutely certain to observe the proper voltage level and
polarity guidelines.
 The SDD-12 can be connected to 12 to 24 Volt DC
power sources.
SDD-12
Cigarette Lighter DC/DC
Converter (12 to 24 Volts)
As close
as possible
above. Attach the ferrite core as close as possible to
the SDD-12 body, as shown.
Do not connect any accessory unapproved
by YAESU to supply DC power; otherwise
the FTA-750/FTA-550/FTA-450 may be
damaged.
Antenna Installation
 To attach the supplied antenna to the FTA-750/
FTA-550/FTA-450, grasp the base of the antenna
firmly, and exert a moderate “pinching” pressure on
the base as you press the antenna onto the radio’s
antenna connector. While exerting this pressure,
rotate the antenna clockwise 1/4 turn to lock the antenna in place.
Ferrite Core
Wind the cable one turn,
then snap two halves


 For noise reduction from exogenous noise, wind one
turn of the SDD-12 cable around the ferrite core,
and snap its two halves together, per the illustration
FTA-750/FTA-550/FTA-450 Operating Manual
15
FCC ID: K6650013X20
IC: 511B-50013X20
Before You Begin
Belt Clip Installation
You may mount the clip to the rear of the FTA-750/
FTA-550/FTA-450 using the supplied screws.
Headset Connection
You may use an optional headset through the supplied
SCU-15 Headset Adapter Cable (see also Page 87).
MIC/SP
Headset
(not supplied)
DA
TA
SCU-15
Headset Adapter Cable
EX
DCT
SHB-11
Belt Clip
with two screws (M3 x 8)
16
1. Remove the cover and two screws of the MIC/SP
jack located on the right side of the transceiver.
2. Insert the plug of the SCU-15 to the MIC/SP jack.
3. Fix the plug with two screws attached to the SCU15.
 Either of the plug directions are acceptable as
long as the both screws fit the screw holes.
4. Insert the plugs of the headset to the sockets of the
SCU-15.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Before You Begin
Precautions
 The FTA-750/FTA-550/FTA-450 are capable of
two-way communication on channels used for critical aviation safety communications. Therefore, it is
important that this radio be kept away from children
or other unauthorized users at all times.
 Do not dispose of the Lithium-ion battery pack in a
fire. Do not carry a Lithium-ion battery pack in your
pocket, where keys or coins could short the terminals. This could create a serious fire/burn danger,
and possibly cause damage to the Lithium-ion pack.
 The FTA-750/FTA-550/FTA-450 are designed to
have the waterproof capability equivalent to IPX5.
Do not allow the radio to become submerged, and
do not subject it to water spray under pressure.
FTA-750/FTA-550/FTA-450 Operating Manual
17
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
 A channel frequency will
appear on the display. If
not, press the [COMM]
key.
Reception (COM Band)
Turning the radio on and off
 To turn the radio on,
press and hold the
POWER switch.
“WARNING” will be
displayed.
 The “BUSY” icon appears on the display when the
audio signal is received on the current frequency.
PTT
WARNING
BUSY
This device can only
be used as SQL
an aid to
navigation for VFR.
All information
is presented for
reference only.
You assume total
responsibility and
risk associated with
using this device.
127.300
VOL
I agree
 If you agree with the
warning message, press
the [ENT] key.
18
 To turn the radio off, press and hold the POWER
switch.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
Adjusting the frequency
 You may turn the DIAL
selector (outer) knob on
the top panel to choose
the desired operating
frequency. The channel
frequency will appear
on the LCD.
 Directly entering frequencies from the keypad is the
easiest method if you know the frequency on which
you wish to operate. Just enter the five digits of the
frequency to move to that frequency.
For example, to set
134.35 MHz,
press [1]  [3]  [4]
VOL
 [3]  [5].
To set 118.275 MHz,
you do not need to
press the final “5” in the
frequency as below:
[1]  [1]  [8]  [2]
 [7].
 You may recall the operating frequency that you
have used by pressing the [ENT] key.
A list of frequencies you have used will appear below the VOL meter on the display.
Select the desired frequency by pressing the
[ ◄ ] or [ ► ] key, then
press the [ENT] key.
13-.---
FTA-750/FTA-550/FTA-450 Operating Manual
BUSY
133.800
VOL
132.400
134.800
127.600
119.150
124.250
129.200
19
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
Adjusting the volume
Adjusting the squelch
 Rotate the VOL (inner)
knob to set the volume
level. If no signal is
present, press the SQL
switch; background
noise will now be heard,
and you may use this
noise to set the VOL
knob for the desired
audio level. Press and
hold the SQL switch
to silence the noise and
resume normal (quiet)
monitoring.
 Press the SQL switch,
then rotate the DIAL
selector knob to set the
squelch threshold (0 to
15) so that the receiver
is just silenced. A higher number indicates that
a higher signal level
is required in order to
open the squelch.
PTT
PTT
SQL
BUSY
127.300
SQL
SQL
 Press and hold the SQL switch to set the squelch
threshold to 0 (off).
Your
new setting will be saved each time you per
form either of the operations above.
20
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
Monitor Switch
When listening to a very weak signal from an aircraft or
ground station, you may observe the signal disappearing
periodically as the incoming signal strength becomes too
weak to override the squelch threshold setting.
To disable the squelch temporarily, press and hold the
SQL switch for 2 seconds. The squelch will remain
open and you should have a better chance of hearing
weak signals.
 To access the emergency frequency, press and
hold the [121.5] key.
After four beeps, the
transceiver enters the
emergency mode and
the frequency is automatically tuned to
121.500 MHz.
To return to normal operation, press the SQL momentarily.
VOL
132.400
134.800
127.600
119.150
124.250
129.200
Accessing the 121.5 MHz Emergency Frequency
The FTA-750/FTA-550/FTA-450 can quickly access
the 121.500 MHz emergency frequency. This function
can be activated even when the keypad lock function
(described on Page 46) is in use.
121.500
EMERGENCY
EMG
 To exit the emergency mode, press the [COMM]
key. The message confirming the cancelation of the
emergency mode will appear. Press the [◄] or [►]
key to select “YES”, then press the [ENT] key.
FTA-750/FTA-550/FTA-450 Operating Manual
21
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
Transmission (COM Band)
 To transmit, press and
hold the PTT switch.
Speak into the microphone area of the front
panel grille in a normal
voice level.
The “TX” icon, which
indicates that the FTA750/FTA-550/FTA450 are in the transmit
mode, appears on the
display.
TX
127.300
PTT
VOL
SQL
 To return to the receive mode, release the PTT
switch.
Operating Advice: Use of Internal Microphone
Your FTA-750/FTA-550/FTA-450 are sealed against water ingress, which includes waterproof seals around the microphone and speaker enclosure. This requires that you focus your speech in the direction of the microphone’s location, so as to ensure sufficient
voice input to the radio. Refer to the illustration and observe the location of the internal
microphone.
If you find it difficult to utilize the FTA-750/FTA-550/FTA-450 conveniently and
safely while speaking directly into the microphone, we recommend the use of the SSM10A Speaker/Microphone (option), or an aftermarket aviation headset with boom microphone.
22
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
Operation Bands
When the FTA-750/FTA-550/FTA-450 are turned on
for the first time, it enters the COMM mode and displays
the COM band screen. The COMM mode is the basic
operation mode of the FTA-750/FTA-550/FTA-450
that allows you to tune through either of the NAV (except
for FTA-450) and COM bands using the DIAL knob or
the keypad.
 NAV band (108.000 - 117.975 MHz):
Band for navigation utilizing data signals emitted by
VOR (VHF omnidirectional range) stations and ILS
(instrument landing system) of airports.
When the FTA-750/FTA550 receive a data signal
associated with VOR or
ILS, the display will automatically switch to the NAV
band screen which shows a
CDI (course deviation indicator) based on the received
signal, and “NAV”, which
indicates that the FTA-750/
FTA-550 are on the NAV
band, appears on the display.
NAV VOR
113.600
KLAX-VOR
VOL
33 N
30
12
24
21
15
OBS
000°
355°
FROM
SOGKT
150
When receiving a VOR
signal on the FTA-750
 COM band (118.000 - 136.975 MHz):
Band for communication utilizing audio signals.
FTA-750/FTA-550/FTA-450 Operating Manual
23
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
 COMM
The basic operating mode for communication. Navigation through the NAV band is also performed on
this mode.
Operation Modes
The FTA-750/FTA-550/
FTA-450 operate in either
of the modes below. You
can switch the modes via
the MENU screen displayed
by pressing the [ MENU ]
key on the front panel.
 MR (MEMORY)
This mode provides you with the ability to store and
recall as many as 200 channels in the radio’s main
memory bank.
 WX (WEATHER) (USA/Canada Only)
The receive mode for the VHF weather channel broadcasts. 10 weather channels are pre-programmed at the factory.
 GPS (FTA-750 only)
The position information and status of the GPS satellites according to the signals received by the builtin GPS unit are displayed during this mode.
FTA-750
FTA-550
When turning on the FTA-750/FTA-550/FTA-450, the
last mode you have used before turning off will automatically be entered.
24
 NAVI (FTA-750 only)
Navigation to the waypoint (destination) memorized
or manually input is carried out in this mode.
 SETUP
This mode allows certain aspects of your radio’s
configuration to be customized for your personal
operating conditions.
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
Convenient menu items
The MENU screen also includes the following items
which provide advanced and convenient usage of the
FTA-750/FTA-550/FTA-450.
 TIMER
You may use the FTA-750/FTA-550/FTA-450 as a
countdown timer or a stopwatch through this menu.
 FUNCTION
Enables and disables various functions such as scan
and dual watch features through this menu.
Resetting the Radio
To clear all memories and other settings to factory defaults:
1. Press the [MENU] key to display the MENU screen.
2. Select “SETUP” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
3. Select “CONFIGURATION” on the screen by
pressing the [◄] or [►]
key, and then press the
[ENT] key.
FTA-750/FTA-550/FTA-450 Operating Manual
25
FCC ID: K6650013X20
IC: 511B-50013X20
Basic Operation
4. Select “RESET” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
5. Select “FACTORY” on
the screen by pressing
the [◄] or [►] key, and
then press the [ ENT ]
key.
6. Select “OK?” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
26
CONFIGURATION
LAMP
CONTRAST
KEY BEEP
TIMER ALARM
BATTERY SAVE
LOCK SELECT
PTT LOCK
RESET
The initialization will start and then “COMPLETED!”
will be displayed after the radio returns to factory
default.
CONFIGURATION
RESET
FUNCTION
MEMORY
COMM & GPS
CONFIGURATION
FACTORY
CONFIGURATION
RESET
FACTORY
OK?
CANCEL
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Reception of VOR Signals (except for FTA-450)
When the FTA-750/FTA-550 receive a VOR (VHF
omnidirectional range) signal, the display will automatically switch to the NAV band screen which shows a
CDI (course deviation indicator) based on the received
signal, and “VOR”, which indicates that the FTA-750/
FTA-550 are receiving the VOR signal, appears on the
display.
NAV VOR
NAV VOR




113.600
KLAX-VOR
VOL
33 N
30
12
24
21
15
FTA-750








OBS
000°
355°
FROM
SOGKT
150

 
 



113.600
KLAX-VOR
VOL
33 N
30
12
24
21
OBS
000°
355°
FROM



15
FTA-550
Compass rose
Course indicator (OBS direction)
Deviation marks
Course deviation needle
OBS (omni bearing selector) value
VOR value
TO/FROM indicator
SOG (speed over ground) value according to the
GPS signal
 The OBS is set to 0 degree when you use the FTA750/FTA-550 for the first time.
The last value you have set as the OBS will be displayed next time the NAV band screen appears.
 The upside of the compass rose always indicates the
direction set as the OBS.
 When the OBS is set to a degree within the “TO”
range relative to the VOR signal, the FTA-750/
FTA-550 displays a degree adding (or subtracting)
180° to (or from) the VOR signal as the VOR value.
 The SOG is displayed only when the internal GPS
unit is activated and receives a fix in the FTA-750.
Note:
You may change the COM band receive frequency while
receiving a VOR signal. If the [ENT] key is pressed
during the tag name of the VOR station is selected,
the recall screen listing the frequencies you have used
will temporarily appear on the display, so that you may
select a frequency from the list with the [◄] or [►] key
or change the frequency with the DIAL selector knob.
FTA-750/FTA-550/FTA-450 Operating Manual
27
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Reading the CDI
 If the OBS is set to 50° and your aircraft is at 230°
from a certain VOR station, for example, you are “on
course” and the course deviation needle of the CDI
will be at the center of the compass rose.
 If the OBS is set to 50° but your aircraft is at 236°
from a certain VOR station, for example, you are “off
course” and the course deviation needle of the CDI
will be inside the right half of the compass rose.
0°
320°
0°
320°
330° 340° 350°
10°
310°
20°
VOR
90°
100°
0°
210°
200°
180° 17 16 150°
0° 0°
113.600
12
33
15
30
OBS
050°
24 21
FTA-750
28
180° 17 16 150°
0° 0°
140°
NAV VOR
113.600
113.600
KLAX-VOR
120°
130°
190°
140°
NAV VOR
NAV VOR
110°
120°
130°
190°
NAV VOR
VOL
90°
220°
S5
OB
110°
80°
VOR
Station
230°
°
236
100°
210°
200°
70°
240°
80°
VOR
Station
230°
60°
250°
70°
260°
220°
50°
260°
60°
240°
40°
270°
270°
Magnetic
North
30°
290°
50°
250°
20°
280°
280°
30°
R2
VO
0°
S5
OB
Magnetic
North
40°
290°
10°
300°
30°
300°
330° 340° 350°
310°
TO
050°
SOGKT
150
OBS
050°
12
33
15
30
VOL
KLAX-VOR
VOL
24 21
TO
050°
OBS
050°
12
33
15
30
113.600
KLAX-VOR
24 21
FTA-750
TO
056°
SOGKT
150
KLAX-VOR
VOL
12
33
15
30
OBS
050°
24 21
TO
056°
FTA-550
FTA-550
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
 The course deviation needle moves to the right if
your aircraft is off course to the left of the OBS, or
moves to the left if your aircraft is off course to the
right of the OBS.
 The deviation marks indicate off-course level by
2 degrees up to 10 degrees per each side. If your
deviation exceeds 10 degrees, the course deviation
needle will stay at the position of the fifth mark (the
end of the scale) of the left or right side.
3. Enter the course to the VOR station with the keypad
or the DIAL knob.
NAV VOR
NAV VOR
NAV VOR
113.600
113.600
KLAX-VOR
VOL
33 N
30
12
24
21
15
FTA-750
OBS
000°
355°
FROM
15
SOGKT
150
33 N
30
12
24
21
OBS
175°
21
12
24
30
N 33
TO
175°
SOGKT
150
15
OBS
175°
21
12
24
FTA-750
30
TO
175°
N 33
FTA-550
NAV VOR
113.600
OBS
000°
355°
FROM
KLAX-VOR
VOL
4. Correct your course until the course deviation
needle on the screen is at the center of the compass
rose.
NAV VOR
KLAX-VOR
VOL
113.600
KLAX-VOR
VOL
Flying to a VOR station
1. Set the frequency to the desired VOR station.
2. Press the [◄] or [►] key to select “OBS” on the
screen.
NAV VOR
113.600
12
15 S 21
24
15
FTA-550
FTA-750/FTA-550/FTA-450 Operating Manual
113.600
KLAX-VOR
VOL
30
N 33
FTA-750
OBS
175°
TO
170°
SOGKT
150
KLAX-VOR
VOL
15
OBS
175°
21
12
24
30
TO
170°
N 33
FTA-550
29
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Flying to a desired course
If you know the direction of your destination from a
specific VOR station, you may use the CDI to correct
your course of flying.
1. Set the frequency to the desired VOR station.
2. Press the [◄] or [►] key to select “OBS” on the
screen.
NAV VOR
113.600
33 N
30
12
24
21
15
FTA-750
30
113.600
113.600
OBS
000°
355°
FROM
SOGKT
150
33 N
30
30
12
24
21
15
OBS
000°
355°
FROM
113.600
KLAX-VOR
VOL
33 N
KLAX-VOR
VOL
NAV VOR
NAV VOR
NAV VOR
KLAX-VOR
VOL
3. Enter the course from the VOR station with the keypad or the DIAL knob.
4. Correct your course until the course deviation
needle on the screen is at the center of the compass
rose.
24
21
12
S 15
FTA-750
OBS
355°
350°
FROM
KLAX-VOR
VOL
33 N
30
24
SOGKT
150
21
OBS
355°
350°
FROM
12
S 15
FTA-550
FTA-550
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Reception of ILS Signals (except for FTA-450)
When the FTA-750/FTA-550 receive an ILS (instrument landing system) signal, the display will automatically switch to the NAV band screen which shows a
CDI (course deviation indicator) based on the received
signal, and “LOC”, which indicates that the FTA-750/
FTA-550 are receiving the localizer signal, and “GS”,
which indicates that the FTA-750 is receiving the glide
slope signal, appear on the display.
NAV LOC GS




VOL
KLAX-RWY07R
33 N
30
12
24
21
15
FTA-750






NAV LOC
108.500
 
 

108.500
VOL
KLAX-RWY07R


 In the FTA-750 when the internal GPS unit is not
activated or cannot receive a fix even it is activated,
or in the FTA-550, the upside of the compass rose
always indicates the direction of the runway and
no sign indicating the bearings is displayed on the
compass rose.
 In the FTA-750 when the internal GPS unit is activated and receives a fix, the compass rose rotates to
display the approaching course up. The course indicator, deviation marks, and deviation needle also
rotate to display the runway direction if registered
in advance.
NAV LOC GS
108.500
VOL

KLAX-RWY07R
NAV LOC
108.500
VOL
KLAX-RWY07R
33 N
FTA-550
Compass rose
Course (runway) indicator
Deviation marks for localizer
Course deviation needle for localizer
Height deviation indicator for glide slope
Deviation marks for glide slope
FTA-750/FTA-550/FTA-450 Operating Manual
30
12
24
21
Without GPS
15
With GPS, no GS signal,
runway direction registered
31
FCC ID: K6650013X20
IC: 511B-50013X20
adVanced operatIon
Note:
You may change the COM band receive frequency
while receiving an ILS signal. If the [ ENT ] key is
pressed while the tag name of the airport is selected,
the recall screen listing the frequencies you have used
will temporarily appear on the display, so that you may
select a frequency from the list with the [◄] or [►] key
or change the frequency with the DIAL selector knob.
Terminology:
 The localizer signal guides the approach to the
runway in horizontal direction.
 The glide slope signal guides the approach to the
runway in vertical direction. Note that some airports
are unequipped with the glide slope.
Guided by
localizer
Reading the CDI
 The course deviation needle moves to the right if
your aircraft is off course to the left of the runway,
or moves to the left if your aircraft is off course to
the right of the runway.
 The height deviation indicator moves up if your
aircraft flies lower than the ideal altitude, or moves
down if your aircraft flies higher than the ideal altitude.
High
(GS)
Left
(LOC)
Right
(LOC)
Course of approach
Localizer
On course
Glide slope
Runway
Guided by
glide slope
Low
(GS)
CDI Examples Corresponding to Aircraft Location
(Runway is to be at the back of the screen)
32
FTA-750/FTA-550/FTA-450 OPERATING MANUAL
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Split Operation
The split operation feature allows you to transmit a call
to a flight service station using the COM band frequencies, while receiving a station in the NAV band. VOR
stations equipped with this capability typically are
shown, on navigation charts, with the voice calling frequency in parenthesis above the navigation frequency.
Programming a transmit frequency
1. Press the [MENU] key to display the MENU screen.
2. Select “SETUP” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
3. Select “COMM SETUP” on the screen by
pressing the [◄] or [►]
key, and then press the
[ENT] key.
4. S e l e c t “ S P L I T F R E QUENCY” on the screen
by pressing the [◄] or
[►] key, and then press
the [ENT] key.
5. E n t e r t h e t r a n s m i t
frequency with the
keypad.
COMM SETUP
ANL
WEATHER ALERT
SCAN BAND
PTT SCAN STOP
SCAN RESUME
SCAN STOP TYPE
DUAL WATCH FREQ.
SPLIT FREQUENCY
COMM SETUP
SPLIT FREQUENCY
---.---MHz
FINISH
FTA-750/FTA-550/FTA-450 Operating Manual
33
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
6. Select “FINISH” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
The frequency will be
determined and the display will return to the
COMM SETUP menu.
COMM SETUP
SPLIT FREQUENCY
122.100MHz
FINISH
Note:
Only the COM band frequencies can be set as the
transmit frequency.
Activating the split mode
1. Press the [MENU] key to display the MENU screen.
2. Select “FUNC” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
34
3. Select “SPLIT” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
FUNCTION
SCAN MEM
DUAL WATCH
SCAN
SPLIT
LOGGER
OFF
OFF
OFF
OFF
OFF
 If “ON” is displayed in the right hand of “SPLIT”,
the FTA-750/FTA-550/FTA-450 are already
in the split mode.
The display will return
BUSY
±
to the previous screen MR
MEM
and the “±” icon, which
Los Angeles
indicates that the FTA- VOL
132.400 Las Vega
750/FTA-550/FTA450 are in the split
mode, will appear on
the display.
133.800
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Operating in the split mode
 To transmit a voice call during the NAV band reception, press and hold the PTT switch, and speak into
the microphone. The COM band screen will be displayed with the frequency you have set.
 To exit the split mode,
FUNCTION
select “SPLIT” and
SCAN MEM
OFF
press the [ENT] key in
DUAL WATCH
OFF
the FUNCTION menu.
SCAN
OFF
SPLIT
ON
LOGGER
OFF
Reception of Weather Channel Broadcasts
- Weather Channels for USA/ Canada only The FTA-750/FTA-550/FTA-450 can receive VHF
weather channel broadcasts, which may assist your flight
planning. The FTA-750/FTA-550/FTA-450 include
a special bank capable of storing 10 weather channels,
which simplifies access when you are in an unfamiliar
location.
 To receive weather
channels, press the
[ M E N U ] key, select
“WEATHER” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
The last channel you
have tuned will be received.
BUSY
162.475
WX03
VOL
162.550
162.400
162.475
162.425
162.450
162.500
FTA-750/FTA-550/FTA-450 Operating Manual
WX01
WX02
WX03
WX04
WX05
WX06
35
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
 You can also select a
BUSY
weather channel from
the pre-programmed list
WX03
with the DIAL selector VOL
162.550 WX01
knob.
162.400 WX02
162.475 WX03
To confirm the weather
162.425 WX04
channel frequency se162.450 WX05
162.500 WX06
lection, press the [ENT]
key.
 To exit the WX mode, press the [MENU] key, select the mode other than “WEATHER” on the screen
by pressing the [◄] or [►] key, and then press the
[ENT] key.
162.475
Weather alert reception
In the event of extreme weather disturbances, such as
storms and hurricanes, the NOAA (National Oceanic
and Atmospheric Administration) sends a weather alert
accompanied by a 1050 Hz tone and subsequent weather
report on one of the NOAA weather channels.
When the radio receives the weather alert on the operating frequency, it displays a warning as below on the
screen and continues to make alarm sounds until either
of the keys is pressed.
BUSY
162.475
WX03
VOL
WARNING
Radio received
Weather Alert!
Press any keys
You may enable or disable the alarm function when receiving the weather alert signal via the COMM SETUP
menu, if desired. See Page 72 for details.
36
FTA-750/FTA-550/FTA-450 Operating Manual
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
Dual Watch Operation
The dual watch feature automatically checks for activity
on the P-ch (priority channel) set via the COMM SETUP
menu while you are operating on another channel. During the dual watch operation, the current channel and the
P-ch will be polled alternately for a 200 ms interval.
3. Select “COMM SETUP” on the screen by
pressing the [◄] or [►]
key, and then press the
[ENT] key.
Setting the P-ch
1. Press the [MENU] key to display the MENU screen.
2. Select “SETUP” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
4. Select “DUAL WATCH
FREQ.” on the screen by
pressing the [◄] or [►]
key, and then press the
[ENT] key.
5. Enter the frequency you
want to poll, with the
keypad.
COMM SETUP
EMERGENCY CALL
ANL
WEATHER ALERT
SCAN BAND
PTT SCAN STOP
SCAN RESUME
SCAN STOP TYPE
DUAL WATCH FREQ.
COMM SETUP
DUAL WATCH FREQ.
---.---MHz
FINISH
FTA-750/FTA-550/FTA-450 Operating Manual
37
FCC ID: K6650013X20
IC: 511B-50013X20
Advanced Operation
6. Select “FINISH” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
The frequency will be
determined and the display will return to the
COMM SETUP menu.
Starting the dual watch
COMM SETUP
DUAL WATCH FREQ.
127.600MHz
FINISH
1. Press the [MENU] key to display the MENU screen.
2. Select “FUNC” on the
screen by pressing the
[ ◄ ] or [ ► ] key, and
then press the [ ENT ]
key.
38
3. Select “DUAL WATCH”
on the screen by
pressing the [◄] or [►]
key, and then press the
[ENT] key.
FUNCTION
SCAN MEM
DUAL WATCH
SCAN
SPLIT
LOGGER
OFF
OFF
OFF
OFF
OFF
 If “ON” is displayed in the right hand of “DUAL
WATCH”, the FTA-750/FTA-550/FTA-450
are performing the dual watch.
The display will return to the previous screen and
the “DW” icon, which indicates that the FTA-750/
FTA-550/FTA-450 are performing the dual watch,
will appear on the display.
 When the radio encounters a signal in the current
channel, it still polls both channels alternately with
longer staying time on the current channel.
 When the radio encounters a signal in the P-ch, the
radio stays on the P-ch until the signal disappears,
and the frequency indication on the display blinks.
After the signal disappears, the dual watch resumes.
FTA-750/FTA-550/FTA-450 Operating Manual

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