Vertex Standard VXA-300 Pilot III Service Manual

AIR BAND TRANSCEIVER

VXA-300

Operating Manual

CONTENTS

Important Notice! ........................................................... 1

Introduction ....................................................................2

Control & Connectors ................................................... 3

Top Panel........................................................................... 3

Front Panel ........................................................................ 4

Side Panel .......................................................................... 5

Keypad .............................................................................. 6

LCD Display ..................................................................... 7

Before You Begin........................................................... 8

Precautions ........................................................................ 8

Belt Clip Installation ......................................................... 8

Battery Installation and Removal ...................................... 9

Battery Charging ............................................................. 10

Low Battery Indication .................................................... 11

Installing the FBA-25A Alkaline Battery Case ............... 11

Basic Operation ........................................................... 12

Preliminary Steps ............................................................ 12

Operation Quick Start ..................................................... 12

Squelch Adjustment ........................................................ 13

Accessing the 121.5 MHz Emergency Frequency .......... 14

Transmission ................................................................... 14

NOTICE

There are no user-serviceable points inside this
transceiver. All service jobs must be referred to your
Authorized Service Center.

Advanced Operation ................................................... 15

Tuning Methods .............................................................. 15

Reception of Weather Channel Broadcasts ..................... 16

Monitor Switch ............................................................... 17

ANL (Automatic Noise Limiter) Feature ........................ 17

Temperature/battery Voltage Display .............................. 18

LOCK Function ............................................................... 19

Beep On/Off .................................................................... 19

Receive Battery Saver Setup ........................................... 20

Changing the Channel Steps ........................................... 21

Pitch Control ................................................................... 22

VOX Operation ............................................................... 23

PA Operation ................................................................... 24

Timer Operation .............................................................. 26

Memory Operation ....................................................... 28

Memory System Operation ............................................. 28

Memory Storage .............................................................. 28

Recalling the Memories .................................................. 29

Scanning Operation ....................................................30

Dual Watch Operation ................................................. 32

Priority Dual Watch Operation ...................................33

VOR Navigation ........................................................... 34

To Select the VOR Mode ................................................ 35

Flying to a VOR Station .................................................. 36

Entering a Desired Course .............................................. 38

Position Cross-checking .................................................. 39

Split Operation ................................................................ 40

Programming the USER Key Assignment ................ 41

Field Programming Mode ........................................... 42

CPU Resetting .............................................................. 43

Menu (“Set”) Mode ...................................................... 44

Accessories & Options ............................................... 52

Specifications ..............................................................54

IMPORTANT NOTICE!

FCC RF Exposure Compliance Requirements for Occupational Use Only:

This Radio has been tested and complies with the Federal Communications Commission (FCC) RF exposure limits for
Occupational Use/Controlled Exposure Environment. In addition, it complies 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 Electromag-

netic 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 red LED on the upper right corner of the front panel of the radio is illumi­nated. You can cause the radio to transmit by pressing the P-T-T button.

 Always use Yaesu authorized accessories.

VXA-300 PILOT III OPERATING MANUAL

1

INTRODUCTION

The YAESU VXA-300 is a compact, stylish, solid hand-held transceiver providing communication (transmit and receive)
capability on the International Aircraft Communication Band (“COM” band: 118 ~ 136.975 MHz), and it additionally pro­vides VOR and CDI navigation features on the “NAV” band (108 ~ 117.975 MHz).

The VXA-300 boasts 0.8 Watt of clean audio output from its 1.4” (36-mm) diameter loudspeaker, and it also provides 8.33
kHz synthesizer steps for the receiving of the new narrow-band channel plan. The VXA-300 includes both Temperature and
Supply Voltage displays with our exclusive Omni-GlowTM display back-lighting for minimal degradation of your night
vision, NOAA weather band monitoring, 8-character Alpha/Numeric Display, 150 Memory Channels, and up to 100 “Book
Memory” Channels. The channel configurations are can be easily reprogrammed in minutes using the optional PC Pro­gramming Kit and your PC.

We recommend that you read this manual in its entirety, so as to understand the many features of the VXA-300 completely.
Keep this manual handy, so you may use it for reference.

NOTE: The VXA-300’s VOR and CDI Navigation features are supplemental aids to navigation only, and are not intended
to be a substitute for accurate (primary) VOR/CDI or landing service equipment.

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 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.

2

VXA-300 PILOT III OPERATING MANUAL

CONTROLS & CONNECTORS (TOP PANEL

Antenna Jack



This SMA jack accepts the supplied flexible antenna,
or another antenna designed to provide 50 Ω imped­ance on the Aircraft Communication Band.

MIC/EAR Jack



You may connect the supplied CT-96 Headset Cable
or the (optional) MH-44B4B Speaker/Microphone to
this jack. To use this jack, you must first remove the
plastic cap by rotating it counter-clockwise, then lift­ing it away from the transceiver body.
Never connect any Speaker/Microphone that is not
recommended by the manufacturer. Because these jack
connections are unique, using a Speaker/Microphone
that is not specified by YAESU may damage the VXA-

300.

Do not allow the VXA-300 to become sub­merged in water while the plastic cover over

the MIC/EAR jack is removed.

)

 

POWER/VOLUME (Inner) Knob



Turn this (inner) control clockwise to turn the radio
on and to increase the volume. Counterclockwise ro­tation into the click-stop will turn the radio off.
Pressing this knob downward momentarily selects the
tuning methods among the VFO (Variable Frequency
Oscillator), MR (Memory Recall), BOOK (Pre-Pro­grammed Memories), and WX (Weather Channel
Memories) modes.
Note: The WX mode is available in the USA version
only.

VXA-300 PILOT III OPERATING MANUAL

DIAL Selector (Outer) Knob



This (outer) 20-position detented rotary switch tunes
the operating frequency or selects the memory chan­nels.

3

CONTROLS & CONNECTORS (FRONT PANEL

)

BUSY/TX Indicator Lamp



This lamp glows green when a signal is being received,
and red when transmitting.

Loudspeaker



The internal speaker is located in this position.

Microphone



Speak across this opening in a normal voice level,
while pressing the PTT switch, to transmit.

LCD (Liquid Crystal Display)



The display shows selected operating conditions, as
indicated on the next page.

Keypad



The keypad is used for most radio command opera­tions. Several keys have triple functions.
The primary functions are activated by simply press­ing the key momentarily.
The secondary functions are activated by pressing the
key followed by [F] key.
The third functions are activated by pressing and hold­ing in the key for 2 seconds.
These functions are described in detail on page 6.

Battery Pack Latch



Open this latch for battery removal.












4

VXA-300 PILOT III OPERATING MANUAL

CONTROLS & CONNECTORS (SIDE PANEL

PTT (Push To Talk) Switch



Press this button to transmit when you are operating
in the COM band. Release this button to return to the
“Receive” mode. See page 14 for details.

MONITOR 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 13 for
details.

EXT DC Jack



When an external 12-Volt DC power source is avail­able, you may connect the (optional) E-DC-5B Ex­ternal DC Cable here.

1) Do not allow the VXA-300 to become sub­merged in water while the rubber cover is

removed.

2) Do not connect any wire to this jack if that wire is
connected directly to a 28-Volt DC source. Connect­ing the VXA-300 directly to a source which exceeds

15.0 Volts DC will result in damage to the unit, and
this type of damage is not covered by the Limited
warranty on this product.

)







VXA-300 PILOT III OPERATING MANUAL

5

CONTROLS & CONNECTORS (KEYPAD

)

Primary Function

(

Press Key

Secondary Function

(

Press [F] + key

Third Function

(

Press and Hold key

Primary Function

(

Press Key

Secondary Function

(

Press [F] + key

Third Function

(

Press and Hold key

Primary Function

(

Press Key

Secondary Function

(

Press [F] + key

Third Function

(

Press and Hold key

Primary Function

(

Press Key

Secondary Function

(

Press [F] + key

Third Function

(

Press and Hold key

6

)

)

)

)

)

)

)

)

Frequency Entry Digit 1

Activates DVOR mode.

)

Frequency Entry Digit 4

)

Frequency Entry Digit 7

Activates Split (Duplex)

)

)

None

Activates Deviation

Indicator mode.

None

mode.

None

None

Split-Memory

“Write” Command.

Memory “Write”

Command.

Frequency Entry Digit 2

Activates “TO” VOR

mode.

None

Frequency Entry Digit 5

Activates Pitch Control

feature.

None

Frequency Entry Digit 8

Activates the Stop Watch

Timer.

None

Frequency Entry Digit 0

Adjusts the Squelch

threshold level.

None

Frequency Entry Digit 3

Activates “FROM” VOR

mode.

None

Frequency Entry Digit 6

Displays the Battery Voltage and Current

Temperature inside the transceiver’s case.

None

Frequency Entry Digit 9

Allows Skipping of

Channel during Scan.

None

Swiches the VFO mode

“A” and “B.”

Activates the Dual Watch

feature.

Activates Scanning.

Select Memory Display

Type.

Activates the Key Lockout

feature.

Selects DVOR Display

Type

Selects Emergency

Channel (121.5 MHz).

None

None

Activates the Automatic Noise

Limiter during AM reception.

None

Activates the Public

Address feature.

Activates “Secondary”

key mode.

Cancel the “Secondary”
key mode of the [F] key.

None

VXA-300 PILOT III OPERATING MANUAL

CONTROLS & CONNECTORS (LCD DISPLAY

)

This field displays the course
heading in degrees. See page 35.

This icon is used during
VOR navigation, to
indicate that the displayed
information is based on a
course from the VOR
station. See page 35.

This icon is used during
VOR navigation, to
indicate that the displayed
information is based on a
course to the VOR station.
See page 35.

This indicator confirms
that “Dual Watch” is
active. See page 32.

This icon indicates that the
“Book” Memory Bank is in
use. See page 15.

This is the Course Deviation Indicator, used
during VOR Navigation. See page 36.

These digits provide frequency or alpha-numeric
information about the channel you are using.

This indicator confirms
that “Automatic Noise
Limiter” is active. See
page 17.

This icon indicates that the
“Weather Alert” feature is
active. See page 50.

This indicator confirms that
the “Split” (Duplex) mode is
activeted during VOR
operation. See page 40.

This icon indicates that the
channel step is selected to
“8.33 kHz” in the NAV and
COM band. See page 21.

This indicator confirms
that this channel will be
skipped during scan. See
page 31.

This indicator confirms
that Secondary Key
Function is active. See
page 6.

This icon is the “Low
Battery” indicator, which
blinks when the battery
voltage becomes too low
for proper operation.

This indicator confirms that
“VOX” system is active.
See page 23.

VXA-300 PILOT III OPERATING MANUAL

7

BEFORE YOU BEGIN

Precautions

 This apparatus is 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.

 When making DC connections via the (optional)

E-DC-5B/E-DC-6 DC cable, be absolutely certain to
observe the proper voltage level and polarity guidelines.
Do not connect this radio directly to any 24 ~ 28 Volt
DC source, nor to AC power of any kind. Connecting
the VXA-300 directly to a source which exceeds 15.0
Volts DC will result in damage to the unit. The Limited
Warranty for this product does not cover damage caused
by the application of improper voltage.

 Do not dispose of the Ni-MH Battery Pack in a fire.

Do not carry a Ni-MH 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 Ni-MH pack.

 Although the VXA-300 is designed to be Submers-

ible (3 ft., 30 min.), its enclosure is not designed to
guarantee protection from ingress of water under ex­treme pressure. Do not allow the radio to become sub­merged in deep water, and do not subject it to water
spray under pressure.

8

Belt Clip Installation

 Connect the hanger to the rear of the VXA-300, with

the notch pointing directly up, using the supplied screw
(Figure 1). Use only the screw included with the clip
to mount the clip to the back of the VXA-300.

 Clip the Quick-Draw Belt Clip onto your belt (Figure

2).

 To install the VXA-300 into the Quick-Draw Belt Clip,

align the hanger with the Quick-Draw Belt Clip, and
slide the VXA-300 into its slot until a click is heard
(Figure 3).

 To remove the VXA-300 from the Quick-Draw Belt

Clip, rotate the VXA-300 180 degrees, then slide the
VXA-300 out from the Quick-Draw Belt Clip (Figure

4).

VXA-300 PILOT III OPERATING MANUAL

Figure 1

BEFORE YOU BEGIN

Battery Installation and Removal

 To install the battery, insert the battery pack into the

battery compartment on the back of the radio, then
close the Battery Pack Latch until it locks in place
with a “Click.”

Figure 2

 To remove the battery, turn the radio off and remove

any protective cases. Open the Battery Pack Latch on
the bottom of the radio, then lift the battery upward
and out from the radio.

Do not attempt to open any of the rechargeable

Ni-MH packs, as personal injury or damage to
the Ni-MH pack could occur if a cell or cells become
accidentally short-circuited.

Figure 4Figure 3

VXA-300 PILOT III OPERATING MANUAL

9

BEFORE YOU BEGIN

Battery Charging

It is necessary to charge the Ni-MH battery fully before its
first use. Follow these procedures:



Install the supplied FNB-83 Ni-MH battery pack onto
the transceiver. Ensure that the transceiver is switched
off.

 Plug the PA-48

Battery Charger
into the AC line
outlet, then insert
the cable plug into
the jack located on
the left side of the
CD-28 Charger
Cradle.

 Insert the trans-

ceiver and battery
pack into the CD-
28; the antenna jack should be at the left side when
viewing the charger from the front.

 If the transceiver and battery pack are inserted cor-

rectly, the RED indicator on the CD-28 will glow. A
fully-discharged pack will be charged completely in
12 hours.

Important Notes:

 The PA-48 is not designed to power the transceiver

for operation (reception or transmission).

 Do not leave the charger connected to the transceiver

for continuous periods in excess of 24 hours. Long
term overcharging can degrade the Ni-MH battery pack
and significantly shorten its useful life.

 If using a charger other than the PA-48/CD-28, or if

using a battery pack other than the FNB-83, 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.

10

VXA-300 PILOT III OPERATING MANUAL

BEFORE YOU BEGIN

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 before further use.

 Avoid recharging Ni-MH batteries before the “Low

Battery” indicator is observed, as this can degrade
the charge capacity of your Ni-MH battery pack.
YAESU recommends that you carry an extra, fully­charged pack with you so you will not lose communi­cations capability due to a depleted Ni-MH battery.

Installing the FBA-25A (option) Alkaline
Battery Case

The optional FBA-25A Battery Case allows operation of
the VXA-300 using six “AA” size Alkaline batteries.

When installing batteries, insert the (–) end first, then press
in the (+) end so the battery snaps into place. Always
replace all six batteries at the same time, paying attention
to the polarity indicated inside the case.

The FBA-25A must not be used with recharge-

able cells. The FBA-25A does not contain the
thermal and over-current protection circuits (provided
in the “FNB” series of Ni-MH Battery Packs) required
when utilizing Ni-Cd and Ni-MH cells.

VXA-300 PILOT III OPERATING MANUAL

11

BASIC OPERATION

Preliminary Steps

 Install a charged battery pack onto the transceiver, as

described previously.

 Screw the supplied antenna onto the Antenna jack.

Never operate this transceiver without an antenna con­nected.

 If you have an optional Speaker/Microphone or head-

set, we recommend that it not be connected until you
are familiar with the basic operation of the VXA-300.

Operation Quick Start

 To turn the radio on, ro-

tate the (inner) VOL-
UME knob out of the
click-stop.

 A channel frequency

should appear on the dis­play. If not, press down­ward (momentarily) on
the VOLUME knob (re­peatedly, if necessary) so
that “- VFO -” appears
on the display, followed by a channel frequency.

 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]  [3]  [5].
To set 118.275 MHz, you do not need to press the
final “5” in the frequency:
[1]

 [1]  [8]  [2]  [7].

Press

12

VXA-300 PILOT III OPERATING MANUAL

BASIC OPERATION

 You may also turn the

top panel’s (outer) DIAL
selector knob to choose
the desired operating
frequency. The channel
frequency will appear on
the LCD.

 Rotate the VOLUME

knob to set the volume
level. If no signal is
present, press and hold
the MONITOR switch
for 2 seconds; back­ground noise will now
be heard, and you may
use this noise to set the
VOLUME knob for the
desired audio level.
Press the MONITOR
switch momentarily to
silence the noise and re­sume normal (quiet) monitoring.

 To turn the radio off,

turn the VOLUME knob
fully counter-clockwise
into the click stop posi­tion.

Squelch Adjustment

 Press the [F] key momen-

tarily, then press the
[0(SQ)]

stantly recalls Menu Item
01 “SQL” which is ad­justs the threshold level
of the squelch circuit.

 Rotate the DIAL selector knob to set the squelch

threshold (0 to 8) so that the receiver is just silenced.
A higher number indicates that a higher signal level is
required in order to open the squelch.

 Press downward on the VOLUME knob to save your

new setting.

 Press the PTT switch to exit the Menu (“SET”) mode.

key. This in-

VXA-300 PILOT III OPERATING MANUAL

13

BASIC OPERATION

Accessing the 121.5 MHz Emergency Frequency

The VXA-300 can quickly access the 121.500 MHz Emer­gency Frequency. This function can be activated even when
the keypad lock function (described on page 19) is in use.

 To access the Emer-

gency Frequency, press
the [121.5] key momen­tarily.

 To exit the Emergency

Frequency, press down­ward on the VOLUME
knob.

Operating Advice: Use of Internal Microphone

Your VXA-300 is extensively sealed against water ingress, so as to ensure reliable opera­tion even if it has become submerged. This unique construction includes waterproofing
seals around the microphone and speaker enclosure, requiring that care be exercised when
speaking into the internal microphone.

Please refer to the illustration, and observe the location of the internal microphone. It is
important that you focus your speech in the direction of the microphone's location, so as to
ensure sufficient voice input to the radio.

If you find it difficult to utilize the VXA-300 conveniently and safe while speaking directly
into the microphone, we recommend the use of the MH-44B4B Speaker/Microphone (op­tion), or an after-market aviation headset/boom microphone.

Transmission

 To transmit, press and hold the PTT switch. Speak

into the microphone area
of the front panel grille
in a normal voice level.

 To return to the receive

mode, release the PTT
switch.

14

VXA-300 PILOT III OPERATING MANUAL

ADVANCED OPERATION

Tuning Methods

Throughout this manual, you will see references to sev­eral different frequency setting methods. Each will be par­ticularly useful in a particular operating situation, and they
are described below:

 VFO (Variable Frequency Oscillator)

The VFO is a “tuning dial”
system which allows you to
tune through the NAV or COM
bands using the DIAL selector,
the Keypad, or the scanner. The VXA-300 has two
VFOs which are called VFO-A and VFO-B. Press the
[

SCAN(DW)] key momentarily to switch between

VFO-A and VFO-B. You may set VFO-A to the NAV
band, and VFO-B to the COM band, if you like.

 MR (Memory Recall)

The MR (Memory Recall)
mode of the VXA-300 pro-
vides the user with the ability
to store and recall as many as
150 channels in the radio’s main memory bank. These
memory channels may also be labeled by you with an
alpha/numeric name of up to 8 characters in length, to
aid in quick identification of the channel. See page 28
for details on creating alpha/numeric labels.

 BOOK (Pre-Programmed) Memories

The Book memories are pre­programmed, either at the fac­tory or by your Dealer (de­pending on your country’s re­quirements), typically including the major COM and
NAV band station frequencies used in your area. The
Book memories can be changed by the user. See page
42 for details.

 WX (Weather Channel) Memories (USA version only)

Ten Weather Channels are pre-programmed at the fac­tory. The VXA-300 will auto­matically scan this special
bank when it is selected by the
user.

VFO

WX

( )

USA version only

Press

MR

BOOK

VXA-300 PILOT III OPERATING MANUAL

15

ADVANCED OPERATION

Reception of Weather Channel Broadcasts
(USA version only)

The VXA-300 can receive VHF Weather Channel broad­casts, which may assist your flight planning. The VXA-
300 includes a ten-channel auto-search feature, which sim­plifies access to Weather Channels when you are in an
unfamiliar location.

 To receive Weather

Channels, press the
VOLUME knob (re­peatedly, if necessary)
to select the Weather
Channel mode. In the
Weather Channel mode,
“- WX -” will appear on the display.

 The VXA-300 will now scan quickly through the ten

standard Weather Channels, and will stop on the first
active station found.

 If there are two or more weather channels audible in

your area, you may select the alternate channel(s) by
pressing the PTT switch. Pressing the PTT switch re­initiates the scanning process.

 If there are no Weather Channels in your area, the scan-

ner will not stop. Press the MONITOR switch to stop
the scanner.

Press

16

 You can also select Weather Channels manually by

rotating the DIAL selector knob.

 To confirm the current Weather Channel frequency,

press the
changes to frequency indication. Press the
key again to return to normal display.

 To exit the Weather Channel mode, press the VOL-

UME knob momentarily to return to the VFO mode.

Note 1: 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. You may
setup the Alert function when receiving the Weather Alert
signal via Menu Item 20 “WXAF,” if desired. See page 50
for details.
Note 2: The Weather Channel mode memorizes the last
Weather Channel you have used, and will retain this infor­mation until the radio is turned off.

[ ( )]

key momentarily. The display

[ ( )]

VXA-300 PILOT III OPERATING MANUAL

ADVANCED 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
MONITOR switch for 2 sec­onds on the left side of the
radio, just below the PTT
switch. The squelch will re­main open and you should
have a better chance of hear­ing weak signals.

To return to normal operation, press the MONITOR switch
momentarily.

ANL (Automatic Noise Limiter) Feature

For reduction of impulse noise, such as that produced by
an engine’s ignition system, the ANL feature may prove
helpful. The ANL feature is only activated in the AM mode.

 To activate the ANL fea-

ture, press the [USER
key momentarily. The
“ ” icon will appear
on the display, and you
should observe a reduc­tion in the ignition noise.

 To turn the ANL feature off,

repeat the above step; the
“ ” icon will disappear
from the display.

]

VXA-300 PILOT III OPERATING MANUAL

17

ADVANCED OPERATION

Temperature/Battery Voltage Display

The VXA-300 can measure the current temperature inside
the transceiver’s case and current battery voltage.

 To display these items,

press the [F] key momen­tarily, then press the
[6 (

SENSR)] key.

 The display will now in-

dicate the current tem­perature inside the
transceiver’s case or cur­rent battery voltage.
Press the VOLUME
knob to switch the dis­play between “current

temperature” and “cur­rent battery voltage.”

Press



 When the VXA-300 dis-

play “current tempera­ture,” pressing the
[ ( )]
the temperature unit be­tween “Celsius: °C” and
“Fahrenheit: °F.”

key to switch



 To return to the normal operation, press [F] 

[6 (

SENSR)] again.

If the temperature display is incorrect, it can be re-cali­brated via Menu Item 14 “TEMP.” See page 49 for details.

18

VXA-300 PILOT III OPERATING MANUAL

ADVANCED OPERATION

LOCK Function

The lock function prevents accidental changes to the fre­quency setting and the keypad controls.

 To activate the lock fea-

ture, press the [F] key
momentarily, then press

[ ( )]

the

 In the LOCK mode, the

display will show
“- LOCK -” when you
rotate the DIAL selector knob, press the VOLUME
knob, or touch a key on the keypad.

 To turn the lock feature off, press [F] 

again.

 You can still access the 121.500 MHz Emergency Fre-

quency when the LOCK function is on.
Simply press the [121.5] key momentarily (this key
never locks). Pressing this key also unlocks the radio.

You may choose the lockout configuration according to
your operating preferences. See page 51 for details.

key.

[ ( )]

Beep On/Off

The VXA-300’s key/button beeper provides convenient
audible feedback whenever a button is pressed. Each key
and button has a different beep pitch, and each function
has a unique beep combination.

When you are scanning, the beeper will be heard each time
the scanner halts on a busy channel. This may be distract­ing in some environments; if you want to turn the beeper
off (or back on again):

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL selector knob to select Menu Item

05 “BEEP.”

 Press the VOLUME knob to enable adjustment of this

Menu item.

 Rotate the DIAL selector knob to select the desired

“beeper.” The selections available are on, DTM, and

oFF.
on: Sounds a beep corresponding to a musical note.
DTM: Sounds a beep corresponding to a DTMF tone.
oFF: Disables the key beeper.

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT key to exit to normal operation.

VXA-300 PILOT III OPERATING MANUAL

19

ADVANCED OPERATION

Receive Battery Saver Setup

An important feature of the VXA-300 is its Receive Bat­tery Saver, which “puts the radio to sleep” for a time inter­val, periodically “waking it up” to check for activity. If
somebody is talking on the channel, the VXA-300 will
remain in the “active” mode, then resume its “sleep” cycles.
This feature significantly reduces quiescent battery drain,
and you may change the amount of “sleep” time between
activity checks using the Menu System:

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL selector knob

to select Menu Item 06
“RSAV.”

 Press the VOLUME knob to

enable adjustment of this Menu item.

 Rotate the DIAL selector knob to select the desired

“duty cycle” (receive:sleep). The selections available
are 1:1, 1:2, 1:3, 1:4, 1:5, and ABS or oFF. The
default value is 1:1.

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT key to exit to normal operation.

ABS: Automatic Battery Saver, based on activity on



the receiver.

The setting of 1:5 will promote the greatest conservation
of battery capacity, but the receiver’s response time to in­coming calls will be slowed somewhat.

Note: This feature does not operate during Scan or Dual
Watch.

20

VXA-300 PILOT III OPERATING MANUAL

ADVANCED OPERATION

Changing the Channel Steps

The VXA-300’s synthesizer provides the option of utiliz­ing channel steps of 8.33/25 kHz per step.

The VXA-300 is set up with default channel steps of “25
kHz” (NAV and COM bands). If you need to change the
channel step increments, the procedure to do so is very
easy.

 First set the VXA-300 to the operating band (VFO A

or VFO B and NAV or COM) on which you wish to
change the channel steps.

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL selector knob

to select Menu Item 30
“STEP.”

 Press the VOLUME knob to

enable adjustment of this Menu item.

 Rotate the DIAL selector knob to select the new chan-

nel step size.

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT key to exit to normal operation.

Important Note

1) When you set the channel step to 8.33 kHz, the channel

display differs from actual operating frequency; see the
chart below. However, the operator (pilot, tower, con­trol, etc) will call out the frequency according to what
the display indicates.
When you set the channel
steps to 8.33 kHz, the “ ”
icon will appear in the display.

Operating

Frequency

1xx.0000 MHz
1xx.0083 MHz
1xx.0166 MHz
1xx.0250 MHz
1xx.0333 MHz
1xx.0416 MHz
1xx.0500 MHz
1xx.0583 MHz
1xx.0666 MHz
1xx.0750 MHz
1xx.0833 MHz
1xx.0916 MHz

8.33 kHz Step

1xx.005 MHz
1xx.010 MHz
1xx.015 MHz
1xx.030 MHz
1xx.035 MHz
1xx.040 MHz
1xx.055 MHz
1xx.060 MHz
1xx.065 MHz
1xx.080 MHz
1xx.085 MHz
1xx.090 MHz

Display

25 kHz Step

1xx.000 MHz

1xx.025 MHz

1xx.050 MHz

1xx.075 MHz

2) The 8.33 kHz step allows the radio to receive only, and

the transmit function is disabled.

3) The adjacent channel selectivity will be slightly de-

graded while receiving using 8.33 kHz channel steps.

VXA-300 PILOT III OPERATING MANUAL

21

ADVANCED OPERATION

Pitch Control

The VXA-300 includes a feature that lets you choose four
special receiver audio responses to allow the most com­fortable and/or effective reception in noisy environments.
The effect is similar to that provided by an “Equalizer” in
a stereo.

 Press the [F] key mo-

mentarily, then press the
[5 (

PITCH)] key. This

instantly recalls Menu
Item 31 “PIT” which se­lects the receiver audio
responses.

 Rotate the DIAL selector knob

to select desired receiver au­dio response. Available selec­tions are:
oFF: The received audio signal does not pass through

the equalizer circuit.

MD1: The received audio is passed without roll-off

on the high or low ends.

MD2: The received audio is enhanced in the low- and

mid-range frequencies.

MD3: The received audio is enhanced in the mid- and

high-range frequencies.

USR: The received audio is shaped per a user-con-

figured audio response programmed via Menu
Items 26 “UP_L,” 27 “UP_M,” and 28
“UP_H.” The default setting enhances the au­dio in the lower frequency range, and reduces
the level of the higher-frequency components.

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT key exit to normal operation.

SELECTION

oFF
MD1
MD2
MD3

USER

RESPONSE

Normal

Full Boost
Low Boost
High Boost

Default

LOW-RANGE

0

+
+

–

+

MID-RANGE

0

+
+
+

0

HIGH-RANGE

0

+

–

+

–

22

VXA-300 PILOT III OPERATING MANUAL

ADVANCED OPERATION

VOX Operation

If you want to have both hands free, use the (user-sup­plied) Headset and activate the VOX (voice-actuated trans­mit/receive switching) system.
Note: The VOX system does not function when using just
the internal microphone; an external headset must be used.

To activate the VOX system using the Menu System:
 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL selector knob

to select Menu Item 21 “VOX.”

 Press the VOLUME knob to

enable adjustment of this
Menu item.

 Rotate the DIAL selector knob to select “on” (to en-

able the VOX system).

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT switch to exit to normal operation.

 Without pressing the PTT switch, speak into the mi-

crophone in a normal voice level. When you start
speaking, the transmitter should be activated automati­cally. When you finish speaking, the transceiver should
return to the receive mode (after a short delay).



To cancel VOX and return to PTT operation, just repeat
the above procedures, selecting “oFF” in step 4 above.

When the VOX system is activated,
the “ ” icon will appear on the
display.

The VXA-300 provides for adjustment of the VOX Gain
via the Menu, to prevent accidental transmitter activation
in a noisy environment. To set the VOX Gain:

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL selector knob

to select Menu Item 23
“VSNS.”

 Press the VOLUME knob to

enable adjustment of this Menu item.

 While speaking into the microphone, rotate the DIAL

selector knob to the point where the transmitter is
quickly activated by your voice, without causing back­ground noise to activate the transmitter.

 When you have selected the optimum setting, press

the VOLUME knob to save the new setting, and then
press the PTT switch to exit to normal operation.

VXA-300 PILOT III OPERATING MANUAL

23

ADVANCED OPERATION

The VXA-300 also provides for adjustment of the “Hang­Time” of the VOX system (the transmit-receive delay af­ter the cessation of speech) via the Menu. The default de­lay is 1.0 second. To set a different delay time:

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL selector knob

to select Menu Item 22
“VDLY.”

 Press the VOLUME knob to

enable adjustment of this Menu item.

 Rotate the DIAL selector knob to select the delay time

among “05,” “10,” “15,” and “20” (representing 0.5,

1.0, 1.5, and 2.0 sec).

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT switch to exit to normal operation.

PA Operation

The PA mode allows the VXA-300 to be used as a Public
Address System when an optional MH-44B4B Microphone
or other Headset/Microphone is connected.

 Press and hold in the

[

USER] key for 2 sec-

onds to activate the PA
mode.

 Speak through the mi-

crophone while pressing
and hold in the PTT
switch on the microphone or headset/microphone.
The “

Course Deviation Needle

will defect in accordance with
the voice level. Rotate the
VOLUME knob to control the
audio output level.

 To exit the PA mode, press and hold in the [USER

key again.

The VXA-300 provides for customization of the voice
monitor feature via the Menu while using a Headset. To
select the monitor configuration:

”

]

24

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

VXA-300 PILOT III OPERATING MANUAL

ADVANCED OPERATION

 Rotate the DIAL selector knob

to select Menu Item 25
“PAMO.”

 Press the VOLUME knob to

enable adjustment of this Menu item.

 Rotate the DIAL selector knob to select the desired

monitor mode.

oFF: Disables the monitor function at all times.
PA: Feeds back your voice to the headset while

you’re pressing the PTT switch.

ALL: Feeds back your voice to the headset while

you’re pressing the PTT switch. When the PTT
switch is off, you may monitor the sound around
the transceiver (the monitor will pick up the
background sound using the VXA-300’s inter­nal microphone).

 When you have made your selection, press the VOL-

UME knob to save the new setting, and then press the
PTT switch to exit to normal operation.

Note: Do not activate the voice monitor feature while us­ing with the optional MH-44B4B Microphone. The voice
monitor feature will tend to produce “howling” due to feed­back.

VXA-300 PILOT III OPERATING MANUAL

25

ADVANCED OPERATION

Timer Operation

The VXA-300 is provided a “Stop Watch” timer and a
“Count Down” timer. These can be used for a variety of
time-keeping purposes.

 Press the [F] key mo-

mentarily, then press the
[8 (

TIMER)] key to acti-

vate the Timer Mode.

 Press the

toggle the Timer be­tween the “Stop Watch”
and “Count Down” timer
modes.

[ ( )]

key



“Count Down” timer mode“Stop Watch” mode

 If you select the “Count Down” timer, rotate the DIAL

knob to set the values for the timer (1 minutes - 60
minutes).

 The Timer is designed to start/stop/reset repeatedly

whenever you press the VOLUME knob.

 In the “Count Down” timer mode, an alert will sound

and the timer will stop when the “Count Down” timer
reaches “00 00 00.”

 To disable the Timer Mode, press [F]  [8 (TIMER

again.

)]

26

VXA-300 PILOT III OPERATING MANUAL

Note

ADVANCED OPERATION

VXA-300 PILOT III OPERATING MANUAL

27

MEMORY OPERATION

The VXA-300 provides 150 user-programmable “Main”
memories, labeled “CH-001” through “CH-150,” and
up to 100 pre-programmed memories, designated “Book”
Memories. The “ ” icon appears when the “Book”
Memory Mode is activated.

The Main memories and “Book” Memories can be assigned
alpha-numeric names of up to eight characters.

Memory System Operation

The VXA-300’s Main Memory system allows the user to
store, label, and recall channel frequencies which you may
want to use frequently. You may store VFO frequencies,
Book Memory frequencies, and/or Weather Channel fre­quencies (USA version only) into the Main Memory sys­tem.

Memory Storage

 Select the desired frequency in the VFO mode, or re-

call the Book Memory channel or Weather channel to
be stored in the Main Memory.

 Press and hold in the

[

MW (SPL-W)] key for

2 seconds. The display
will indicate “CH-XXX”
and a channel number
will blink on the LCD.

 Within five seconds of

pressing the [MW (SPL-W)] key, rotate the DIAL
selector knob to select the desired memory channel
number for storage.
In order to prevent writing over memory channels, a
small “ ” icon will appear at
the right side of the channel
number to indicate a vacant
memory channel.

 Now press and hold in the [MW (SPL-W)] key for 2

seconds; you will now see blinking “A” on the LCD.
To attach an alpha/numeric name (label) to the
memory, proceed to the next step; otherwise press and
hold in the [MW (SPL-W)] for 2 seconds to save the
entry and exit.

28

VXA-300 PILOT III OPERATING MANUAL

MEMORY OPERATION

 To label a memory with an alpha/numeric name, the

next step is to use the DIAL selector knob to select
any of the 48 available characters (including letters,
numbers, and special symbols). When the desired first
character appears, press the VOLUME knob momen­tarily to move on to the next character.

 Select succeeding characters in the same manner,

pressing the VOLUME knob momentarily after each
selection.

 After entering the entire name (eight characters maxi-

mum), press the [MW (SPL-W)] key for 2 seconds to
save all data for the channel and exit.

Note: If you have transferred a Weather Channel directly
to memory, the “WX-001 ~ WX-010” labels utilize the
alphanumeric memory, and other labels may not be stored.
But if you go to the VFO mode, and dial up or key in the
weather station’s frequency manually, you may then store
the frequency and a custom alpha-numeric label yourself.

Recalling the Memories

 Press the VOLUME knob, repeatedly if necessary,

until “- MR -” (Memory Recall) appears on the dis­play. In the MR mode, you will see “CH-” and the
previously selected channel number appearing on the
LCD.

 Rotate the DIAL selector knob to select the desired

memory channel.

 You may change the title structure of the Memory dis-

play type among:

1. Channel Indication (sequential Channel Number,
e.g. CH-001, CH-002, etc.);

2. Frequency Indication (e.g. 122.500); or

3. Alphanumeric Label (e.g. LAX FSS).

 To change the Memory display title, press the

[ ( )]

the desired display title structure.

 To exit the Memory mode, press the DIAL selector

knob three times to return to the VFO mode.

Note: In either the “MR” or the “Book” Memory mode,
an easy way to recall memories is to key in the memory
channel number, then press the [SCAN (DW)] key. For
example, to recall memory channel #14, press [1]  [4
 [SCAN (DW)].

key repeatedly, if necessary, until you get

]

VXA-300 PILOT III OPERATING MANUAL

29

SCANNING OPERATION

The VXA-300 allows you to scan automatically in the

 1

VFO
Channel2 modes. It pauses on signals encountered, so you
can talk to the station(s) on that frequency, if you like.





If you wish to scan in the NAV band (108.000 ~ 117.975
MHz), you can do so manually, as described at the right.

Scanning operation is basically the same in each of the
above modes.

 Press and hold in the

 When the scanner encounters a signal, scanning pauses

, Main Memory, “Book” Memory, or Weather

1: In the VFO mode, the automatic scanner is only avail-

able in the COM band (118.000 ~ 136.975 MHz);
when the scanner reaches the uppermost frequency in
the COM band, it will revert to the bottom end of the
COM band and repeat the scanning process until you
cancel the scanning process.

2: USA version only.

[

SCAN (DW)] key for 2

seconds to start the au­tomatic scanner upward
(toward a higher fre­quency or a higher chan­nel number).

and the radio remains on that channel until one sec-

30

ond after the signal disappears, after which scanning
will resume.

 While the scanner remains paused on a frequency, the

decimal point of the frequency display blinks. The dis­play will be illuminated unless the Scan Lamp Fea­ture is turned off.

 To change the scan di-

rection, turn the DIAL
selector knob one click
in the opposite direction.

 To stop the automatic

scanner, press the PTT
switch or the VOLUME
knob momentarily. You may also just press the [SCAN
(DW)]

key.

The VXA-300’s automatic scanner is not operational in
the NAV band (108.000 ~ 117.975 MHz), because the NAV
stations (ILS, etc.) transmit constantly (thereby causing
the scanner to stop repeatedly). However, you can scan
manually in the NAV band, per the following procedure:

 Press and hold the [SCAN (DW)] key to start the

manual scanner. Scanning will continue as long as the
key is depressed.

 Release the [SCAN (DW)] key to stop the manual

scanner immediately.

VXA-300 PILOT III OPERATING MANUAL

SCANNING OPERATION

Note: When scanning upward in frequency, when the fre­quency reaches the COM Band (118.000 ~ 136.975 MHz)
via manual scanning, the VXA-300 will switch to the au­tomatic scanner mode.

Channel-Skip Scanning

Continuous-carrier stations like ATIS (Automatic Termi­nal Information Service) or Weather Broadcast stations
inhibit scanner operation. Since these stations are always
active, the scanner will be halted repeatedly on their chan­nels. Such channels can be set to be “skipped” during
Memory scanning (MR, Book or WX modes), if you like,
so as not to interfere with automatic channel scanning:

 Recall the Memory Channel to be skipped during scan-

ning.

 Press the [F] key mo-

mentarily, then press the
[9 (

SKIP)].

The “ ” icon will
appear at the upper right
of the channel number,
indicating that the chan­nel is to be ignored during
scanning.

 You can also designate a chan-

nel to be skipped while scan-

VXA-300 PILOT III OPERATING MANUAL

ning. When the receiver is halted on a channel that
you wish to skip, press and hold the [SCAN (DW
key for 2 seconds (the “ ” icon will appear next
to the channel to be skipped).

 Later, to re-enable the memory channel for scanning,

repeat the first two steps. The “ ” icon will dis­appear by the channel you have just re-enabled.

Note: A memory set to be “skipped” is still accessible for
manual memory selection using the DIAL selector knob.

)]

31

DUAL WATCH OPERATION

The Dual Watch feature automatically checks for activity
on a “priority” channel while you are operating on an­other channel. During Dual Watch operation, the current
channel and the Priority channel will each be polled for a
500 ms interval, as the VXA-300 looks for activity on each
channel.

 To start Dual Watch,

press the [F] key mo­mentarily, then press the
[

SCAN (DW)].

The “ ” icon will ap­pear on the display.

 While receiving on the

“current” channel (not the Pri­ority channel), you may push
the PTT switch at any time to
transmit on that channel.

 When a signal is received on the Priority channel, op-

eration immediately shifts to the Priority channel, the
“ ” icon will blink, and the display will become
illuminated.

 While receiving on the priority channel, if you momen-

tarily press the PTT switch, Dual Watch will be dis­abled. You may then transmit on the Priority Channel.

 To stop Dual Watch, press [F]  [SCAN (DW)].

 If you wish, you may use both the Dual Watch and

Scan features simultaneously. To do this, start the Dual
Watch first, then start the Scanner.

: The “priority” Channel is defined as the last-used



Memory Channel (when using the VFO mode) or Memory
Channel 1 (when using the Main Memory or Book Memory

modes).

32

VXA-300 PILOT III OPERATING MANUAL

PRIORITY DUAL WATCH OPERATION

Similar to Dual Watch operation (described on previous
page), Priority Dual Watch is an enhanced version which
includes the following additional features:

 The receiving time interval (ratio) between the cur-

rent channel and the Priority channel may be custom­ized via Menu Item 09 “PRTM.” See page 47 for de­tails.

 Irrespective of which channel is currently being re-

ceived, when the PTT button is pushed transmission
will always occur on the Priority channel.

Before initiating Priority Dual Watch, Menu Item 10
“DWMD” must be set to the “PRI: Priority” mode (instead
of “DW: Dual Watch”). See page 48 for details.

 To start Priority Dual

Watch, press the [F] key
momentarily, then press
the [SCAN (DW)]. The
“ ” icon will appear
on the display.

 While receiving on the

“current” (non-Priority) chan­nel, pressing the PTT button
once causes the radio to switch
to the Priority channel and can-

cels Dual Watch. Press the PTT button again to trans­mit on the Priority channel.

 When a signal is received on the Priority channel, re-

ception immediately shifts to the Priority channel, the
“ ” icon will blink, and the display will become
illuminated unless the Scan Lamp Feature is turned
off.
While receiving on the priority channel, if you mo­mentarily press the PTT button, Priority Dual Watch
will be disabled. You may then transmit on the Prior­ity Channel.

 To stop Priority Dual Watch, press [F]  [SCAN (DW)].

VXA-300 PILOT III OPERATING MANUAL

33

VOR NAVIGATION

General VOR Equipment

COM Band

(118.000 - 136.975 MHz)

0

3

2

4

0

OBS

COURSE Indicator



0

0

3

3

0

3

0

6

0

COURSE Indicator

COURSE Deviation Needle

TWO-Degree Deviation Marks

0

2

2

1

0

FROM

180

1

0

5

1

“TO”-“FROM” Flag Indicator

NAV Band (108.000 - 117.975 MHz

)

DVOR MODE CDI MODE

COURSE Indicator

COURSE Deviation Needle

“TO”-“FROM” Flag Indicator

OVERFLOW Indicator

“TO”-“FROM” Flag Indicator

34

VXA-300 PILOT III OPERATING MANUAL

VOR NAVIGATION

To Select the DVOR Mode

 When entering the NAV band (108.000 - 117.975

MHz), the VXA-300 selects the DVOR mode auto­matically. The “COURSE INDICATOR” field will appear
at the upper left corner on the display, and the “ ”
or “ ” indicator will appear below the “Course
Indicator” field on the display.
Note: The “COURSE INDICATOR” indicates “ ”
when either your aircraft is too far away from the VOR
station or the frequency is not correctly set to that of
the VOR station. Conversely, the “Course Indicator”
will indicate “ ” when receiving a localizer chan­nel. The VXA-300 cannot decode a localizer signal.

 The “ ” or “ ” flag indicators tell you whether

the VOR navigation information is based on a course
leading to the VOR station or leading away from the
VOR station.

 To change the flag from “ ” to “ ” or vice versa,

press the [F] key momentarily, then press the
[3 (

FROM)] or [2 (TO)] key, respectively.

 The small “COURSE INDICATOR” and “ / ” flag

indicators may be toggled to the larger “Frequency”
portion of the display. To do this, press and hold in

[ ( )]

the
display area. Press the
again to return to the smaller displays.

key for 2 seconds to toggle to the larger

[ ( )]

key momentarily

VXA-300 PILOT III OPERATING MANUAL

COURSE Indicator

“TO”-“FROM” Flag Indicator

( )

2 seconds

35

VOR NAVIGATION

Flying to a VOR Station

The VXA-300 can indicate the deviation from the direct
course to a VOR station.

 Select a VOR station on your aeronautical chart and

turn the DIAL selector knob (or enter the frequency
directly with the keypad) to the frequency of the VOR
station.

 To indicate the deviation between your current flight

path and the desired course, press the [F] key mo­mentarily, then press the [4 (CDI)] key to change to
the CDI (Course Deviation Indicator) mode. The
“COURSE DEVIATION ARROW” will appear above the
frequency field on the display when your aircraft is
off the direct course to the VOR station.

 When your aircraft is off course to the right, the Course

Deviation Arrow display will show bars to the left side
of the diamond (“ ”). When your aircraft is off
course to the left, the Course Deviation Arrow dis­play will show bars to the right side of the diamond
(“ ”). Correct your course until no bars appear
on either side of the CDI “Diamond” (only “ ”) will
be visible when the heading is correct).

 To return to the DVOR mode, press the [F] key mo-

mentarily, then press the [1 (DVOR)] key.

The Aircraft is “ON COURSE”

OFF COURSE to the “right” 6 degrees

OFF COURSE to the “left” 6 degrees

36

VXA-300 PILOT III OPERATING MANUAL

The Aircraft is “ON COURSE”

VOR NAVIGATION

()

VOR TAC

Los Angeles

LAX - 113.600MHz

2

2

8

0

2

7

0

°

2

6

0

°

2

5

0

°

2

4

0

°

2

3

e

s

r

u

o

C

d

e

r

i

s

e

D

H

t

f

a

r

c

r

i

A

°

0

5

g

n

i

d

a

e

0

3

3

3

0

°

3

2

0

°

3

1

0

°

3

0

0

°

9

0

°

°

°

3

4

5

0

0

°

°

1

0

°

2

0

°

3

0

VOR

0

°

2

2

0

°

2

1

0

Statio n

°
2

0

0

°

1

9

0

°

1

1

1

8

6

7

0

0

0

°

°

°

1

1

3

0

°

1

4

0

°

1

5

0

°

N

Magnetic
North

°

4

0

°

5

0

°

6

0

°

7

0

°

8

0

°

9

0

°

1

0

0

°

1

1

0

°

2

0

°

The Aircraft is “OFF COURSE”

()

VOR TAC

Los Angeles

LAX - 113.600MHz

VXA-300 PILOT III OPERATING MANUAL

0

4

0

VOR

1

°

°

3

5

0

°

°

1

0

°

2

0

°

3

0

1

1

3

0

°

1

4

0

°

1

5

0

°

1

6

7

0

0

°

°

3

3

3

0

°

3

2

0

°

3

1

0

°

3

0

0

°

2

9

0

°

2

8

0

°

2

7

0

°

2

6

0

°

2

°

5

0

6

°

5

g

n

i

d

a

e

H

t

f

a

r

s

r

c

r

u

i

o

A

c

f

f

o

r

u

°

6

o

(

c

n

w

o

l

F

r

c

r

i

A

a

e

h

2

4

0

)

e

e

s

t

f

a

n

i

d

°

2

3

0

°

2

2

0

°

e

b

2

1

0

d

l

u

o

h

s

°

0

5

g

Statio n

°
2

0

0

°

1

9

0

°

1

8

0

N

Magnetic
North

°

4

0

°

5

0

°

6

0

°

7

0

°

8

0

°

9

0

°

1

0

0

°

1

1

0

°

2

0

°

37

VOR NAVIGATION

Entering a Desired Course

The VXA-300 can also be configured to indicate the de­viation from the desired course, not only the deviation from
the path to the VOR station.

 Set the frequency to the desired VOR station.
 Change the “ ” or “ ” flag to “ ,” if it is not

in that mode already.

 Press [F] à [4 (CDI)] key to change to the CDI mode.
 Set the desired course to the VOR station using the

DIAL selector knob or keypad (three digits are re­quired; e.g. for 47°, press [0]  [4]  [7]).
Note 1: The (“ ”) or (“ ”) indication will
appear on the display when your aircraft is off the de­sired course.
Note 2: When your heading is correct, the ABCS func­tion may be more useful than the course input option

 The Course Deviation Arrow points to the right when

your aircraft is off course to the left, and it points to
the left when your aircraft is off course to the right.

Note 1: To get back on course, fly right more than the
number of degrees indicated by the Course Deviation Ar­row.
Note 2: If the overflow indicator “” appears on the right
side, select a heading plus 10 degrees to the desired course;
if the overflow indicator “” appears on the left side, se­lect a heading minus 10 degrees.

ABCS Mode

In the CDI mode, the Auto Bearing Center System
(ABCS) adds or subtracts the number of degrees indi­cated by the CDI from the Omni Bearing Selector
(OBS).

38

VXA-300 PILOT III OPERATING MANUAL

VOR NAVIGATION

Position Cross-checking

 Select two VOR stations on your aeronautical chart.
 Set the frequency of one of the VOR stations in the

DVOR mode. The course indicator will show the
course deviation from the VOR radial. Note the radial
you currently are on.

0

4

0

°

VOR

1

°

°

3

5

0

°

1

0

°

2

0

°

3

0

°

4

0

°

N

°

0

°

7

0

°

8

0

°

9

0

°

0

°

VOR TAC

Long Beach
SLI

- 115.700MHz

Magnetic
North

()

5

0

6

1

0

1

1

0

°

1

2

0

°

1

3

0

°

1

4

0

°

1

5

0

°

1

7

6

0

0

°

°

3

3

3

0

°

3

2

0

°

3

1

0

°

3

0

0

°

2

9

0

°

2

8

0

°

2

7

0

°

2

6

0

°

2

5

0

°

2

4

0

°

2

3

0

°

2

2

0

°
2

1

0

Statio n

°

2

0

0

°

1

9

0

°

1

8

0

 Now set the frequency of the other VOR station in the

DVOR mode. Note the radial from the station you are
on.

 Extend the radials from each VOR station on the chart.

Your aircraft is located at the point where the lines
intersect.

0

4

0

VOR

1

°

°

3

5

0

°

°

1

0

°

2

0

°

3

0

°

4

0

°

N

5

0

°

6

9

1

0

1

1

0

°

1

2

0

°

1

3

0

°

1

4

0

°

1

5

0

°

1

7

6

0

0

°

°

Magnetic
North

0

°

7

0

°

8

0

°

0

°

0

°

()

VOR TAC

Los Angeles

LAX - 113.600MHz

3

3

3

0

°

3

2

0

°

3

1

0

°

3

0

0

°

2

9

0

°

2

8

0

°

2

7

0

°

2

6

0

°

2

5

0

°

2

4

0

°

2

3

0

°

2

2

0

°

2

1

0

Station

°
2

0

0

°

1

9

0

°

1

8

0

Cross-checking Position

VXA-300 PILOT III OPERATING MANUAL

39

VOR NAVIGATION

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 VOR 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

 Press the VOLUME knob, repeatedly if necessary, to

select the VFO mode.

 Set a NAV band (108.000 - 117.975 MHz) frequency

using the DIAL selector knob or keypad.

 Press the [F] key momentarily, then press the [MW

(

SPL-W)] key. The “ ” icon will blink, and the

transmit frequency will appear on the display.

 Now set your radio’s transmit frequency, where the

Flight Service Station will be listening for calls, using
the DIAL selector knob or keypad.

 Press and hold in the [MW (SPL-W)] key for 2 sec-

onds to save the transmit frequency and return to the
NAV band frequency.

Note: You have now stored the separate transmit frequency,
but you have not yet activated the split-frequency func­tion; go on to the next section.

Operating in the Split Mode

 It is assumed that you have already set the desired

VOR station’s frequencies (in the NAV band) per the
above instructions.

 Press the [F] key momentarily,

then press the [7 (SPL)] key
to turn on the “Split” function.
The “ ” icon will appear
on the display.

 Press and hold in the PTT switch to transmit on the

split transmit frequency.

 Release the PTT switch to return to the receive mode.
 To disable the “Split” function, press [F]  [7 (SPL

again.

Note: A split frequency can be programmed into each
memory channel independently. Set a transmit frequency
before programming the memory channel, if desired. The
split function on/off setting can also be programmed into
a memory channel.

)]

40

VXA-300 PILOT III OPERATING MANUAL

PROGRAMMING THE USER KEY ASSIGNMENTS

Default VXA-300 functions have been assigned to “Pri­mary” (press) and “Third” (press and hold in) function of
the front panel’s [USER] key at the factory. These may be
changed by the user, if you wish to utilize another function
on this key.

To program the function assigned to the [USER] key:

 Press the [F] key, then press the VOLUME knob to

activate the Menu (“SET”) mode.

 Rotate the DIAL knob to select the Menu Item to be

configured #18 “KEY1” which is tied to the primary
function, or #19 “KEY2” which is tied to the third func­tion.

 Press the VOLUME knob momentarily, then rotate

the DIAL knob to select the function you wish to as­sign to the [USER] key.

 When you have made your selection, press the VOL-

UME knob to save the new setting, then press the PTT

switch to exit the Menu (“SET”) mode.

The available selections include: no/ANL/PA/EQ

ANL: Receiver Automatic Noise Limiter (on)
PA: Public Address Mode (see page 24)
PIT: Pitch Control (see page 22)
no: Disables the key

VXA-300 PILOT III OPERATING MANUAL

41

FIELD PROGRAMMING MODE

The VXA-300’s Book Memories also allow the user to
store, label, and recall channel frequencies which you may
want to use frequently while the VXA-300 is in the Field
Programming mode.

Memory Storage into the Book Memory
 Press and hold the PTT switch and VOLUME knob

while turning the radio on, to activate the Field Pro­gramming Mode. The “Fd” icon will appear in the
upper left-hand corner of the
LCD to confirm that you are
in the Field Programming
mode.

 Select the desired frequency to be stored in the Book

Memory.

 Press and hold in the [MW (SPL-W)] key for 2 sec-

onds. The display will indicate “- BOOK -” and a
channel number will blink on the LCD.

 Within five seconds of pressing the [MW (SPL-W

key, rotate the DIAL selector knob to select the de­sired memory channel number for storage.

 Now press and hold in the [MW (SPL-W)] key for 2

seconds; you will now see a blinking “A” on the LCD.
To attach an alpha/numeric name (label) to the
memory, proceed to the next step; otherwise press and
hold in the [MW (SPL-W)] key for 2 seconds to save
the entry and exit.

 To label a memory with an alpha/numeric name, the

next step is to use the DIAL selector knob to select
any of the 48 available characters (including letters,
numbers, and special symbols). When the desired first
character appears, press down on the VOLUME knob
momentarily to move on to the next character.

 Select succeeding characters in the same manner,

pressing down on the VOLUME knob momentarily
after each selection.

 After entering the entire name (eight characters maxi-

mum), press the [MW (SPL-W)] key for 2 seconds to

)]

save all data for the channel.

 Repeat this procedure to store additional frequencies

into the Book Memory section, as desired.

 Turn the radio off, then turn the radio back on again to

begin normal operation.

42

VXA-300 PILOT III OPERATING MANUAL

CPU RESETTING

In some instances of erratic or unpredictable operation,
the cause may be corruption of data in the microprocessor
(due to static electricity, etc.). If this happens, resetting of
the microprocessor may restore normal operation. Note
that all memories will be erased if you do a complete mi­croprocessor reset, as described below.

To clear all memories and other settings to factory defaults:

 Turn the radio off.
 Press and hold in the VOLUME knob, and the MONI-

TOR button, while turning the radio on.

VXA-300 PILOT III OPERATING MANUAL

43

MENU (“SET”) MODE

The Menu system allows certain aspects of your radio’s
configuration to be customized for your personal operat­ing convenience. We do not recommend that any of the
default settings be changed, however, until you are thor­oughly familiar with the operation of the VXA-300.

1. Press the [F] key, then press

the VOLUME knob to acti­vate the Menu (“SET”)
mode.

2. Rotate the DIAL selector

knob to select the Menu item
(feature) you wish to view
and/or modify.

3. Once you have selected the
desired Menu Item, press the
VOLUME knob once to en­able adjustment of this Menu
item. The current setting
value will be blinking.

Press

4. Rotate the DIAL selector

knob to change the setting of
the item (“on” to “oFF,”
etc.).

5. Press the VOLUME knob to

save your new setting.

6. If you need to change more than one Menu item, re­peat steps 2 - 5.

7. Press the PTT switch to exit
the Menu (“SET”) mode.

Press

MENU Listing

A listing of the Menu items available via the SET mode
may be found on the next page.

44

VXA-300 PILOT III OPERATING MANUAL

Menu Item

Menu No.

SQL

01

MCLR

02

RESM

03

SCNL

04

BEEP

05

RSAV

06

LAMP

07

SFT

08

PRTM

09

DWMD

10

POBP

11

IMIC

12

EMRG

13

TEMP

14

UNIT

15

TOT

16

DIMM

17

KEY1

18

KEY2

19

WXAF

20

VOX

21

VDLY

22

VSNS

23

HPLV

24

PAMO

25

UP_L

26

UP_M

27

UP_H

28

LOCK

29

STEP

30

PIT

31

MENU (“SET”) MODE

Function

Squelch Level Setting.
Memory Channel Clear (“MR” memory only).
Scan-Resume Mode Setting.
Scan Lamp On/Off (while paused).
Keypad Beeper On/Off.
Selects the Receive-mode Battery Saver “sleep” ratio.
Display and Keypad Illumination Mode.
CPU Clock Shift.
Selects the Priority Checking Time.
Selects the Dual Watch/Priority Function.
Select the Power on Beep.
Internal Microphone On/Off.
Emergency channel On/Off.
Correcting the thermometer setting.
Selects the measurement units for the temperature sensor.
Setting of the Time-Out Timer countdown time.
Setting of the display brightness level.
Programming the primary (momentary press mode) [USER] key assignment.
Programming the third (press and hold mode) [USER] key assignment.
Selects the Alert functions when receiving the Weather Alert Signal on the WX channel.
Enables/disables VOX operation.
Selects the VOX delay (“hang”) time.
Sets the VOX sensitivity.
Sets the Headphone audio level.
Enables/disables the External Speaker while utilizing the PA function.
Sets the low-frequency audio response for the user-customized receiver audio tone pitch control.
Sets the mid-range audio response for the user-customized receiver audio tone pitch control.
Sets the high-frequency audio response for the user-customized receiver audio tone pitch control.
Selects the control locking lockout combination.
Selects the synthesizer steps on the Air band.
Selects the Tone Pitch (equalizer) circuit of the audio amplifier in the receiver.

Available Values

0 ~ 8

–

5S / CAR

on / oFF

on / DTM / oFF

1:1 ~ 1:5 / oFF / ABS

KEY / oFF / CNT

on / oFF

05 / 10 / 15 / 20 / 25 / 30

DW / PRI

MD1 / MD2 / MD3 / oFF

on / oFF
on / oFF

–127 ~ +127

°F / °C

1 / 3 / 5 / oFF

LV1 ~ LV4
no / ANL / PA / PIT
no / ANL / PA / PIT

BP / LED / B+L / oFF

on / oFF

05 / 10 / 15 / 20

1 ~ 8
0 ~ 7

oFF / PA / ALL

+ / – / oFF

+ / – / oFF

K / KD / P / PD / PK / PKD / D

oFF / MD1 / MD2 / MD3 / USR

+ / – / oFF

25 kHz / 8 kHz (8.33 kHz

)

Default

6

–
5S
on
on
1:1

KEY

oFF

20

DW

MD1

oFF

on

000

°F
oFF
LV3

ANL

PA
oFF
oFF

10

4
6

oFF

+

oFF

–
K

25 kHz

MD1

VXA-300 PILOT III OPERATING MANUAL

45

MENU (“SET”) MODE

01 [SQL

Function: Squelch Level Setting.
Available Values: 0 ~ 8
Default Setting: 6

Select a setting for this Menu item which just silences the
receiver when no signal is present. Use the lowest setting
which will keep the receiver quiet between incoming trans­missions.

02 [MCLR

Function: Memory Channel Clear (“MR” memory only).
To clear a Memory channel:

 Select the Menu Item MCLR.
 Press the VOLUME knob, then rotate the DIAL se-

 Press the VOLUME knob to clear the Memory chan-

Important Notice: An “erased” channel cannot be restored,
and “CH-001” cannot be erased, as it is used for “Priority
Channel” operation.

]

]

lector knob to recall the memory channel to be erased.

nel (the Memory channel number will return to
“001”).

03 [RESM

Function: Scan-Resume Mode Setting.
Available Values: 5S/CAR
Default Setting: 5S

“5S” (5-Second Pause) mode: the scanner will halt for
five seconds only, after which scanning will resume
(whether or not the other station is still transmitting).
“CAR” (Carrier Drop) mode: the scanner will remain
halted for as long as there is a carrier present on the chan­nel; after the carrier drops at the end of the other station’s
transmission, the scanning will resume.

04 [SCNL

Function: Scan Lamp On/Off (while paused).
Available Values: on/oFF
Default Setting: on

If you set this function to “on,” the lamp will be illumi­nated whenever the scanner pauses. The lamp will go off
automatically when scanning resumes.

]

]

46

VXA-300 PILOT III OPERATING MANUAL

MENU (“SET”) MODE

05 [BEEP

Function: Keypad Beeper On/Off.
Available Values: on/DTM/oFF
Default Setting: on

on: Sounds a beep corresponding to a musical note.
DTM: Sounds a beep corresponding to a DTMF tone.
off: Disables the key beeper.
If you do a lot of scanning, you may wish to set this Menu
item to “oFF,” as the Beeper will be heard each time the
scanner pauses.

06 [RSAV

Function: Selects the Receive-mode Battery Saver “sleep”
ratio.

Available Values: 1:1 ~ 1:5/oFF/ABS
Default Setting: 1:1

The setting of 1:5 will promote the greatest conservation
of battery capacity, but the receiver’s response time to in­coming calls will be slowed somewhat.

ABS: Automatic Battery Saver, based on activity on the



Note: This feature does not operate during Scan or Dual
Watch.

VXA-300 PILOT III OPERATING MANUAL

]

]



receiver.

07 [LAMP

Function: Display and Keypad Illumination Mode.
Available Values: KEY/oFF/CNT
Default Setting: KEY

“KEY” mode: The illumination lamp will be activated for

“oFF” mode: Disables the illumination lamp.
“CNT” mode: Illuminates the Display/Keypad continu-

08 [SFT

Function: CPU Clock Shift.
Available Values: on/oFF
Default Setting: oFF

This function is only used to move a spurious response
“birdie” should it fall on a desired frequency. Consult your
YAESU dealer for details regarding this function.

09 [PRTM

Function: Selects the Priority Checking Time.
Available Values: 05/10/15/20/25/30 (
Default Setting: 20 (2 seconds)

This Menu item allows you to define how often the Prior­ity Channel will be checked for activity.
Note: The Dual Watch Polling time is 500 mS (fixed).

]

5 seconds when any front panel key or the
VOLUME knob is pressed, or if the DIAL
knob is rotated.

ously.

]

]

0.5/1/1.5/2/2.5/3 sec.

)

47

MENU (“SET”) MODE

10 [DWMD

Function: Selects the Dual Watch/Priority Function.
Available Values: DW/PRI
Default Setting: DW

“DW” mode:The VXA-300 will activate the Dual Watch

“PRI” mode: The VXA-300 will activate the Priority fea-

11 [POBP

Function: Select the Power on Beep.
Available Values: MD1/MD2/MD3/oFF
Default Setting: MD1

Note: You will hear the different selections as you rotate
the DIAL selector knob.

]

feature when you press [F]  [SCAN (DW)].

ture when you press [F]  [SCAN (DW)].

]

12 [IMIC

Function: Internal Microphone On/Off.
Available Values: on/oFF
Default Setting: oFF

This controls the status of the radio’s internal microphone
when an external microphone (such as the MH-44B4B
Speaker Microphone or an aviation headset connected via
the CT-96 Headset Cable) is in use. In most applications,
set 12 [IMIC] to “oFF” for proper operation (this disables
the internal microphone). The internal microphone will still
function normally when the external microphone is dis­connected.

13 [EMRG

Function: Emergency channel On/Off.
Available Values: on/oFF
Default Setting: on

This controls the operation of the Emergency [121.5] key.
When set to “oFF,” this key will not function. You can still
use the frequency 121.5 MHz either by entering it on the
keypad in the VFO mode, or by recalling it on a previ­ously-stored memory channel.

]

]

48

VXA-300 PILOT III OPERATING MANUAL

MENU (“SET”) MODE

14 [TEMP

Function: Correcting the thermometer setting.
Available Values: –127 ~ +127 (x0.1 °C)
Default Setting: 000 (ºC)

This allows you to calibrate the internal thermometer with
a known-to be-accurate source.

]

18 [KEY1

Function: Programming the primary (momentary press
mode) [USER] key assignment.

Available Values: no/ANL/PA/PIT
Default Setting: ANL (Automatic Noise Limiter)

See page 41 for details.

]

15 [UNIT

Function: Selects the measurement units for the tempera­ture sensor.

Available Values: °F/°C
Default Setting: °F

16 [TOT

Function: Setting of the Time-Out Timer countdown time.
Available Values: 1/3/5/oFF (minutes)
Default Setting: oFF

The Time-Out Timer shuts off the transceiver after con­tinuous transmission exceeds the programmed time.

17 [DIMM

Function: Setting of the display brightness level.
Available Values: LV1 ~ LV4
Default Setting:LV3

]

]

]

VXA-300 PILOT III OPERATING MANUAL

19 [KEY2

Function: Programming the third (press and hold mode)
[

USER] key assignment.

Available Values: no/ANL/PA/PIT
Default Setting: PA (Public Address)

See page 41 for details.

]

49

MENU (“SET”) MODE

20 [WXAF

Function: Selects the Alert functions when receiving the
Weather Alert Signal on the WX channel.
Available Values: BP/LED/B+L/oFF
Default Setting: oFF

BP: Sounds a loud beep when receiving the Weather

LED: Flashes the BUSY/TX indicator when receiving the

B+L: Sounds a loud beep and flashes the BUSY/TX indi-

oFF: Disables the Alert function.
When the Weather Alert function is activated, the “ ”
icon will appear on the display.

21 [VOX

Function: Enables/disables VOX operation.
Available Values: on/oFF
Default Setting: oFF

22 [VDLY

Function: Selects the VOX delay (“hang”) time.
Available Values: 05/10/15/20 (x0.1 sec)
Default Setting: 10 (x0.1 sec)

]

Alert Signal.

Weather Alert Signal.

cator when receiving the Weather Alert Signal.

]

]

23 [VSNS

Function: Sets the VOX sensitivity.
Available Values: 1 ~ 8
Default Setting: 4

24 [HPLV

Function: Sets the Headphone audio level.
Available Values: 0 ~ 7
Default Setting: 6

25 [PAMO

Function: Enables/disables the External Speaker while uti­lizing the PA function.

Available Values: oFF/PA/ALL
Default Setting: oFF

oFF: Disables the monitor function at all times.
PA: Feeds back your voice to the headset while you’re

ALL:Feeds back your voice to the headset while you’re

]

]

]

pressing the PTT switch.

pressing the PTT switch. When the PTT switch is
off, you may monitor the sound around the trans­ceiver (the monitor will pick up the background
sound using the VXA-300’s internal microphone).

50

VXA-300 PILOT III OPERATING MANUAL

MENU (“SET”) MODE

26 [UP_L

Function: Sets the low-frequency audio response for the
user-customized receiver audio tone pitch control.

Available Values: +/–/oFF
Default Setting: +

27 [UP_M

Function: Sets the mid-range audio response for the user­customized receiver audio tone pitch control.

Available Values: +/–/oFF
Default Setting: oFF

28 [UP_H

Function: Sets the high-frequency audio response for the
user-customized receiver audio tone pitch control.

Available Values: +/–/oFF
Default Setting: –

29 [LOCK

Function: Selects the control locking lockout combination.
Available Values: K/KD/P/PD/PK/PKD/D
Default Setting: K

K: Keypad (includes pressing the VOLUME knob function)
D: DIAL selector knob
P: PTT switch
(Other selections are combinations of these lock-out
choices)

]

]

]

]

30 [STEP

Function: Selects the synthesizer steps on the Air band.
Available Values: 25 kHz/8 kHz (8.33 kHz)
Default Values: 25 kHz

31 [PIT

Function: Selects the tone pitch circuit of the audio am­plifier in the receiver.

Available Values: oFF/MD1/MD2/MD3/USR
Default Values: MD1

oFF: The received audio signal does not pass through

MD1: The received audio is passed without roll-off on

MD2: The received audio is enhanced in the low- and mid-

MD3: The received audio is enhanced in the mid- and

USR: The received audio is shaped per a user-configured

]

]

the tone pitch circuit.

the high or low ends.

range frequencies.

high-range frequencies.

audio response programmed via Menu Items 26
“UP_L,” 27 “UP_M,” and 28 “UP_H.” The de­fault setting enhances the audio in the lower fre­quency range, and reduces the level of the higher­frequency components.

VXA-300 PILOT III OPERATING MANUAL

51

ACCESSORIES & OPTIONS

Supplied Accessories

Ni-MH Battery Pack (7.2V, 1400mAh) FNB-83
Overnight Charger PA-48B/C
Charger Cradle CD-28
Helical Antenna ATV-10
Quick Draw Belt Clip CLIP-14
Headset Cable CT-96
Operating Manual
Warranty Card

“B” suffix is for use with 120 VAC or “C” suffix is for



use with 230-240 VAC.

Available Options

MH-44B4B Speaker Microphone



FBA-25A Alkaline Battery Case
E-DC-5B DC Cable w/Noise Filter
E-DC-6 DC Cable; plug and wire only
CN-3 Antenna Adapter (SMA to BNC)
VAC-370 Desktop Rapid Charger

PC Programming Kit

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.

52

VXA-300 PILOT III OPERATING MANUAL

 External Antenna

ACCESSORIES & OPTIONS

Headset

(not supplied)

CN-3

Antenna Adapter (Option)

CT-96

Headset Cable

VXA-300 PILOT III OPERATING MANUAL

E-DC-5B

DC Cable w/Noise Filter (Option)

PTT Switch (not supplied)
An external PTT switch is
required for use with an avia­tion headset.

53

SPECIFICATIONS

General

Frequency Range: TX: 118.000 - 136.975 MHz

RX: 108.000 - 136.975 MHz,

Weather Channels (WX-01 - WX-10: USA version only)

Channel Spacing: 25 kHz/8.33 kHz (8.33 kHz: RX only)
Emission Type: TX: AM

RX: AM & FM (FM: for receiving the Weather Channels, USA version only)

Supply Voltage: 6.0 - 15.0 VDC
Current Consumption (approx.): 20 µA (power off),

20 mA (battery saver on, saver ratio 1:5)
60 mA (squelch on),
270 mA (receive),

0.9 A (transmit 1.5 W Carrier)

Temperature Range: +14 ºF to + 140 ºF (–10 ºC to +60 ºC)
Case Size (WxHxD): 2.4 x 4.7 x 1.2 inches (60 x 120 x 32 mm) with FNB-83
Weight (approx.): 13.7 oz (390 grams) with FNB-83 and antenna

Receiver

Circuit Type: Double-conversion superheterodyne
IFs: 35.4 MHz & 450 kHz
Sensitivity: Better than 0.8 µV (for 6 dB S/N with 1 kHz, 30 % modulation)
Selectivity: >8 kHz/–6 dB
Adjacent CH. Selectivity: <25 kHz/–60 dB
AF Output (@7.2 V): 0.8 W @ 16 Ohms, 10 % THD

54

VXA-300 PILOT III OPERATING MANUAL

SPECIFICATIONS

Transmitter

Power Output (@ 7.2 V): 5.0 W (PEP), 1.5 W (Carrier Power)
Frequency Stability: Better than ±10 ppm (+14 ºF to + 140 ºF [–10 ºC to +60 ºC])
Modulation System: Low Level Amplitude Modulation
Spurious Emission: >60 dB below carrier
Int. Microphone Type: Condenser
Ext. Mic. Impedance: 150 Ohms

Specifications are subject to change without notice or obligation.

VXA-300 PILOT III OPERATING MANUAL

55

NOTE

56

VXA-300 PILOT III OPERATING MANUAL

Part 15.21: Changes or modifications to this device
not expressly approved by YAESU MUSEN could void
the user’s authorization to operate this device.

YAESU MUSEN CO., LTD.

Tennozu Parkside Building
2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 Japan

YAESU USA

6125 Phyllis Drive, Cypress, CA 90630, U.S.A.

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.

YAESU HK LTD.

Unit 1306-1308, 13F., Millennium City 2, 378 Kwun Tong Road,
Kwun Tong, Kowloon, Hong Kong

Copyright 2012
YAESU MUSEN CO., LTD.

All rights reserved.

No portion of this manual may be
reproduced without the permission of

YAESU MUSEN CO., LTD.

Printed in Japan

1205E-AY

EC057N103