Icom A24 & A6 VHF Air Band Transceivers

RWTUV USA CERTIFIED

The IC-A24/A6 has a completely renewed style with a large LCD and speaker. It offers simple operation by way of a minimum of practical functions. With its stylish design and reliable performance, the IC-A24/ A6 series is a fitting successor to the award winning IC-A23/A5. FEATURES: Durable, stylish body New channel recall function Variety of battery packs and case (Compatible with Icom F series battery pack/case) Simultaneous operating and charging from external power source VOR navigation function (IC-A24 only) Dedicated 121.5MHz Emergency key (Programmed with 121.5MHz homing frequency) Water resistant, equivalent to IPXalphanumeric memory channels with memory banks Side Tone function ANL function DETAILS: Durable Stylish Body: The IC-A24/A6 design has incorporated the size and durability of the IC-A22/A3 and retains the basic user friendly interface users loved about the IC-A23/A5. The large LCD, large speaker and easy-to-use panel layout makes it a rank above the rest. On the side of the radio, it has a non-slip slit to prevent accidental dropping. Large Alphanumeric LCD: For the function display, a 6-character 14segment alphanumeric LCD is employed to make a variety of information visually recognizable immediately. An automatic LCD backlight is standard for night time operation. Channel recall function: New for the IC-A24/A6, this function automatically memorized the last 10 used channels. You can easily recall those channels by pushing the recall buttons on the front panel. It is very convenient for switching between several channels at a time, such as NAV channels and COM channels etc. Icom F Series Battery Packs & Case: The IC-A24/A6 shares the same battery packs and case with the popular land mobile radios IC-F11, F3G, F30G series. Variety of battery types, Ni-Cd, Ni-MH, Li-Ion are optionally selectable. The BP-208N, battery case is available with 6 AA (LR6) alkaline cells as a backup battery source. Simultaneous Operation & Charging From External Power Source: The IC-A24/A6 has an external DC power jack for operation with the AC adapter, BC-110, the optional lighter cable with DC-DC converter, CP20. When battery pack is installed to the radio, it is also simultaneously charged during operation. An external 11.0V DC power source is acceptable.

EDMO Dist, Inc.

800-235-3300

www.edmo.com

Dedicated 121.5MHz Emergency Key: A dedicated red emergency key programmed with a 121.5MHz homing frequency is equipped to give you extra confidence in the event of an emergency. VOR Navigation Function: The IC-A24 has VOR navigation functions. The DVOR mode shows the radial to (or from) a VOR station and the CDI mode shows the course deviation to (or from) a VOR station. You can also input your intended radial to (or from) a VOR station and show the course deviation on the display. In the USA version, the duplex operation allows you to call a COM channel such as a flight service station etc., while receiving a VOR station. Large 200 Memory Channel Capacity With Memory Banks: A total of 200 memory channels can be named with a 6-character channel name for easy recognition. By grouping these channels into 10 memory banks, quick and easy operation is possible. The optional PC cloning software, CS-A24 allows you quick and easy memory management from your PC. Water Resistant, Equivalent To IPX4: The water resistant construction provides reliable operation in wet conditions. Side Tone Function: The side tone function allows you to hear your own voice via a headset. By monitoring you own voice, this function eliminates unnecessary shouting on a noisy runway. Side tone level is adjustable from the transceiver. (Optional OPC-499 Headset Adapter Cable and external aviation headset are required.) Variety Of Scanning Functions: The COM band scan checks all of the busy COM band channels, and the memory scan checks the tagged memory channels. Weather channel scan is also possible. Other Functions: NOAA Weather Channels 5W (PEP) Output Power Low Battery Indication & Over Voltage Alert BNC Type Antenna Connector Keypad Backlighting ANL (Auto Noise Limiter) reduces noise components SPECIFICATIONS: GENERAL: Frequency Range: Transmit IC-A24/A6 Receive IC-A24 IC-A6 WX Channel Spacing Mode No. of Memory Channels Antenna Impedance

Power Supply Requirement 7.4/7.2V DC battery pack 11.0V DC external DC Jack Current Drain @7.2V DC Transmit 1.5A typ. Receive AF Max. 300mA typ. Stand-by 70mA typ. Operating Temp. Range -10C to +60C 14F to +140F Dimensions (HxWxD) 129.3x54x35.5 mm (projections not included) 5-3/32x2-1/8x1-13/32 in. Weight (approx.) 430g; 15.2oz (with antenna & BP-210N) TRANSMITTER: Output Power @ 7.2V
5.0W typ. PEP 1.5W typ. CW Modulation System Low Level Modulation Modulation Limiting 70-100% Audio Harmonic Distortion Less than 10%@60% mod Hum and Noise Ratio More than 35dB Spurious Emissions More than 46dB (Except operating Frequency +62.5kHz point) Frequency Stability +5ppm (room temp) Microphone Impedance More than 100K RECEIVER: Intermediate Frequency:

1st 30.05MHz 2nd 450kHz

Sensitivity (typical) NAV AM 6dB S/N Less than 0.71V COM AM 6dB S/N Less than 0.5V WX FM 12dB SINAD Less than 0.22V Threshold Squelch Sensitivity AM Less than 1V FM Less than 0.45V Selectivity More than 7.5kHz/6dB Less than 25kHz/60dB Spurious Response AM More than 60dB FM More than 30dB Audio Output Power More than 500mW (8 load 10% dist. 30% mod.) Hum and Noise More than 40dB @ 30% mod
118-000-136.975MHz 108-000-136.975MHz 118-000-136.975MHz 161.650-163.275MHz 25 kHz AM (6K00A3E) 16K0G3E (WX Channels) 200 Channels / 10 banks 50 Nominal (BNC type)

* The battery pack, wall charger, headset adapter or carrying case may differ depending on version. Some versions do not include a battery pack, wall charger, headset adapter or carrying case.

IMPORTANT

READ ALL INSTRUCTIONS carefully and completely
before using the transceiver.
SAVE THIS INSTRUCTION MANUAL This instruction manual contains important operating instructions for the IC-A24/A6.

EXPLICIT DEFINITIONS

DEFINITION Personal injury, fire hazard or electric shock RWARNING may occur. CAUTION NOTE Equipment damage may occur. If disregarded, inconvenience only. No risk of personal injury, fire or electric shock. WORD

PRECAUTION

R WARNING! NEVER hold the transceiver so that the
antenna is very close to, or touching exposed parts of the body, especially the face or eyes, while transmitting. The transceiver will perform best if the microphone is 5 to 10 cm away from the lips and the transceiver is vertical.
DO NOT allow children to play with any radio equipment
containing a transmitter.
DO NOT operate the transceiver near unshielded electrical
blasting caps or in an explosive atmosphere.
R WARNING! NEVER operate the transceiver with a headset or other audio accessories at high volume levels. Hearing experts advise against continuous high volume operation. If you experience a ringing in your ears, reduce the volume level or discontinue use. NEVER connect the transceiver to an AC outlet or to a power source of more than 11.5 V DC. Such a connection will damage the transceiver. NEVER connect the transceiver to a power source that is DC fused at more than 5 A. Accidental reverse connection will be protected by this fuse, higher fuse values will not give any protection against such accidents and the transceiver will be ruined. NEVER short the terminals of the battery pack. Also, current may ow into nearby metal objects, such as a necklace, etc. Therefore, be careful when carrying with, or placing near metal objects, carrying in handbags, etc. iii

AVOID using or placing the transceiver in direct sunlight or
in areas with temperatures below 10C (+14F) or above +60C (+140F). The use of non-Icom battery packs/chargers may impair transceiver performance and invalidate the warranty. Even when the transceiver power is OFF, a slight current still ows in the circuits. Remove the battery pack or case from the transceiver when not using it for a long time. Otherwise, the battery pack or installed dry cell batteries will become exhausted.
FCC caution: Changes or modications to this transceiver, not expressly approved by Icom Inc., could void your authority to operate this transceiver under FCC regulations. (U.S.A. only)
Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.

TABLE OF CONTENTS

SAFETY TRAINING INFORMATION.. i FOREWORD... ii IMPORTANT... ii EXPLICIT DEFINITIONS... ii SUPPLIED ACCESSORIES.. ii PRECAUTIONS... iii TABLE OF CONTENTS... iv 1 PANEL DESCRIPTION... I Panel description.. 1 I Function display... 5 ACCESSORY ATTACHMENT.. 7 BASIC OPERATION... I Setting a frequency... 8 I Setting a squelch level... 8 I Selecting a weather channel... 8 I Receiving... 9 I Transmitting... 9 I ANL function... 9 I Low battery indicator.. 10 I Recall function... 10 I Setting weather alert function.. 11 I Accessing 121.5 MHz emergency frequency.. 11 I Lock function.. 11 I Side tone function... 11 I Setting beep tone... 11 I Backlighting... 11 MEMORY OPERATION... I Memory channel selection... 12 I Transferring memory contents.. 12 I Programming a memory channel... 13 I Memory names... 14 I Clearing the memory contents.. SCAN OPERATION.. I Scan types... 16 I COM band scan.. 16 I Memory scan... 16 I Weather channel scan (U.S.A. version only).. 17 I TAG channels.. 17 VOR NAVIGATION (IC-A24 only). I VOR indications.. 18 I VOR functions... 19 I Flying to a VOR station... 20 I Entering a desired course.. 22 I Crosschecking position... 22 I Duplex operation (U.S.A. version only). 24 BATTERY PACKS... I Battery charging.. 25 I Battery cautions.. 25 I Optional battery case... 26 I Optional battery chargers... 27 CLONING... 28 TROUBLESHOOTING.. 29
10 SPECIFICATIONS... OPTIONS... QUICK REFERENCE.. 13 OPTIONAL HEADSET CONNECTION.. 34

PANEL DESCRIPTION

WX-ALERT

I Panel description

y u i w
q !7 !6 !5 Speaker !0 !1 !2 !3 Microphone
q BACKLIGHT SWITCH [LIGHT] (p. 11) Turns the backlight for display and keypad ON or OFF. w PTT SWITCH [PTT] (p. 9) Push and hold to transmit; release to receive.
appears on the function display while transmitting.
u SQUELCH KEY [SQLWX-ALERT] (p. 8) Push [SQLWX-ALERT], then rotate [DIAL] to select the squelch level.

24 squelch levels and squelch open (0) are available.
Push , then push [SQLWX-ALERT] to turn the WX-alert function ON or OFF. i POWER SWITCH [PWR] (pgs. 9, 28) Push and hold for 2 sec. to turn the power ON or OFF. While pushing and holding [MRMW], push [PWR] to enter the cloning function mode. o EXTERNAL SPEAKER AND MICROPHONE JACKS [MIC/SP] (p. 34) Connects an OPC-499 HEADSET ADAPTER and headset, if desired. !0 FUNCTION KEY Push to call up the function indicator, , then push another key to access its secondary function.
appears for 3 sec. after is pushed; at this time pushing again cancels the indication.
e VOLUME [VOL] (p. 9) Adjusts the audio level. r TUNING DIAL [DIAL] (pgs. 812) Rotate [DIAL] to select the desired frequency, WX channel number, BANK number and memory channel. Rotate [DIAL] to set the squelch level and beep tone level. t ANTENNA CONNECTOR [ANT] (p. 7) Connects the supplied antenna. y RECALL CHANNEL UP/DOWN KEYS []/[] (p. 10) Push to enter the recall function mode. Push to call the stored frequency in the recall mode. Push , then push []/[]to replace stored recall frequencies to back or front.
NOTE: In general, disappears when another key is pushed to activate a secondary function. However, some keys which have more than one secondary function, (such as [DUP]), do not cancel . In this case, disappears automatically after 3 sec. 2
!6 ENTER KEY [ENTWX] (pgs. 8, 14) Push to enter the numeral input. Enters consecutive zero digits. (p. 8) Push , then push [ENTWX] to enter the weather channel selection mode (U.S.A. version only). (p. 8) Push to program the memory name. (p. 14) NOTE: Some functions may not be available depending on versions. Ask your authorized dealer for details. DC POWER CONNECTION
IC-A24/A6 CP-20 (for V) (optional)
!1 CLEAR KEY [CLRDEL] (pgs. 817) Push to turn to the frequency mode, when memory channel, WX channel, 121.5 MHz, squelch level setting or beep tone setting is selected. Push , then push and hold [CLRDEL] to delete a recall frequency data. Push to clear the entered comment of memory name while programming. Push to stop the scan function to turn to the frequency mode while the scan function is operating. !2 ANL KEY [ANLSCAN] (pgs. 9, 16, 17) Push to turn the ANL function ON or OFF. Push , then push [ANLSCAN] to start the scan function. !3 EMERGENCY KEY [121.5 MHz] (p. 11) Push for 2 sec. to select the 121.5 MHz emergency frequency. !4 DC POWER JACK Connect the AC adapter or optional cable to charge the battery pack or to operate by external power supply. (see right illustration)

To the cigarette lighter socket To [DC 11V]
!5 MEMORY MODE KEY [MRMW] (pgs. 1215) Push to call the memory channel mode. Push , then push [MRMW] to program the contents into the memory channels. 3

Wall charger

!7 DIGIT KEYS Input the specied digit during frequency input, memory channel selection, etc. In addition, each key has one or more secondary function after pushing as follows: Push , then push [0BANK] to select the memory BANK number to rotate [DIAL] on the memory operation. (p. 12) Push , then push [1DVOR] to select the DVOR display from the CDI display in NAV band. (p. 19)*1 Push , then push [2TO] to change the course indicator characteristics to TO flag in the DVOR display in NAV band. (p. 19)*1 Corrects the deviation while using TO ag. *1 Push , then push [3FROM] to change the course indicator characteristics to FROM flag in the DVOR display in NAV band. (p. 19)*1 Corrects the deviation while using FROM ag. *1 Push , then push [4CDI] to select the CDI display from the CDI display in NAV band. (p. 19)*1
Push , then push [5DUP-W] to set the duplex frequency in NAV band for U.S.A. version only. (p. 24)*1 Push , then push [6DUP] to turn the duplex function ON and OFF in NAV band for U.S.A. version only. (p. 24)*1 Push , then push [7 ] to turn the key lock function ON and OFF. (p. 11) Push , then push [8BEEP] to turn the beep tone setting mode ON (p. 11). Adjustable level; 0 to 9 Push , then push [9TAG] to set the displayed memory or weather channel as a TAG channel. (p. 17)
*1 These functions available on the IC-A24 only.

I Function display

q FUNCTION INDICATOR (p. 2) Appears when is pushed. w TX INDICATOR (p. 9) Appears while transmitting.
e RX INDICATOR (p. 9) Appears when receiving a signal or when the squelch opens.

u !5 !4 i o

r DUPLEX INDICATOR (IC-A24 only) (p. 24) DUP appears when the duplex function is activated in NAV mode. DUP blinks while setting the duplex frequency. t LOW BATTERY INDICATOR (p. 10) Appears when the battery is nearing exhaustion. The attached battery pack requires recharging. Appears and ashes when battery replacement is necessary. y LOCK INDICATOR (p. 11) Appears while the lock function is in use. u FREQUENCY DISPLAY (pgs. 8, 14) Shows the operating frequency. Shows the channel name when the memory name function is selected.

i TAG CHANNEL INDICATOR (p. 17) appears when the memory channel is set as a TAG channel. o MEMORY CHANNEL INDICATOR (pgs. 1215) Shows the memory channel number. !0 MEMORY BANK NUMBER INDICATOR (p. 12) Shows the selected memory bank number. !1 OVERFLOW INDICATOR (IC-A24 only) (pgs. 1822) Appears when the deviation between the desired course and ying course is over 10 degrees. !2 ANL INDICATOR (p. 9) Appears while the ANL (Automatic Noise Limiter) function is in use. !3 COURSE DEVIATION NEEDLES (IC-A24 only) (pgs. 1822) Indicates the deviation between the desired course and your actual ying course every 2 degrees.
!4 COURSE INDICATORS (IC-A24 only) (p. 19) Indicates where your aircraft is located on a VOR radial in DVOR mode. Indicates where your desired course is located on a VOR radial in CDI mode. !5 TO-FROM INDICATOR (IC-A24 only) (p. 19) Indicates whether the VOR navigation information is based on a course leading to the VOR station or leading away from the VOR station.

ACCESSORY ATTACHMENT

D Belt clip
Conveniently attaches to your belt. Attach the belt clip with the supplied screws as below. NOTE: Use the supplied screws only.
D Antenna CAUTION: DO NOT transmit without an antenna. Otherwise the transceiver may be damaged. Insert the supplied antenna into the antenna connector and screw down the antenna as shown below.

Supplied screws

D Battery pack replacement
Before replacing the battery pack, push [PWR] for 2 sec. to turn the power OFF. Slide the battery release button forward, then pull the battery pack upward with the transceiver facing away from you.

BASIC OPERATION

I Setting a frequency

Using keypad

q Push [PWR] for 2 sec. to turn power ON, then push [CLRDEL] to select the frequency mode when memory CH number or WX CH number appears on the function display. w Push 5 appropriate digit keys to input the frequency. Push [1]* as the 1st digit. When a wrong digit is input, push [CLRDEL] to clear, then repeat step w again. Push [ENTWX] to enter consecutive zero digits. Only [2]*, [5]*, [7 ] and [0BANK] can be entered as the 5th and nal digit. [EXAMPLE] 111.225 MHz: Push 117.250 MHz: Push 120.000 MHz: Push 125.300 MHz: Push

I Setting a squelch level
The transceiver has a noise squelch circuit to mute undesired noise while receiving no signal. q Push [SQLWX-ALERT], then rotate [DIAL] to select the squelch level.
SQL--0 is loose squelch and SQL--24 is tight squelch. Appears while the squelch is open. w Push [SQLWX-ALERT] or [CLRDEL] to exit the squelch

set mode.

I Selecting a weather channel

(U.S.A. version only)

The U.S.A. version has VHF marine WX (weather) channel receiving capability for flight planning. q Push , then push [ENTWX] to select WX channel mode.
WX-- and previously selected channel number appears.

Using the tuning dial

q Push [PWR] for 2 sec. to turn power ON, then push [CLRDEL] to select the frequency mode when memory CH number or WX CH number appears on the function display. w Rotate [DIAL] to set the desired frequency. To select the 1 MHz tuning step, push , then rotate [DIAL]. Push again to return the normal tuning.
w Rotate [DIAL] to select the desired WX channel. e Push [CLRDEL] to exit the WX channel mode and return to frequency mode.

I Receiving

q Push [PWR] to turn the power ON. w Push [SQLWX-ALERT], then rotate [DIAL] counterclockwise to select the squelch level 0. e Rotate [VOL] to adjust the audio level. r Push [SQLWX-ALERT], then rotate [DIAL] clockwise until the noise is muted.

indicator disappears.

I Transmitting
CAUTION: Transmitting without an antenna may damage the transceiver.
t Set the desired frequency using [DIAL] or keypad. y When a signal is received on the set frequency:
indicator appears. Squelch opens and audio is emitted from the speaker.
NOTE: To prevent interference, listen on the frequency before transmitting. If the frequency is busy, wait until the channel is clear. q Set the desired frequency in COM band using [DIAL] or keypad.
COM band frequency range: 118.00136.975 MHz
When [SQL] control is too tight, squelch may not open for weak signals. To receive weaker signals, loosen the squelch

w Push and hold [PTT] to transmit.

indicator appears.

e Speak into the microphone at a normal voice level.
DO NOT hold the transceiver too close to your mouth or speak too loudly. This may distort the signal.
r Release [PTT] to return to receive.

I ANL function

The ANL (Automatic Noise Limiter) function reduces noise components such as that caused by engine ignition systems while receiving. Push [ANLSCAN] to turn the ANL function ON/OFF.
appears on the display while the ANL function is ON.

I Low battery indicator

Low battery indicator appears Low battery indicator when the battery power has decreased to a specied level. The attached battery pack requires recharging.
D Deletes the stored recall channel
q Push w Push or to select the deleting recall channel. , then push [CLRDEL] for 2 sec. to delete it.
(e.g.) Deletes r0 recall channel which is stored 120.450 MHz, and r1 recall channel stores 123.450 MHz.

I Recall function

The recall function stores the last 10 frequencies used. The function stores frequencies when the frequency is programmed and transmitted on (except memory, weather and emergency channels).
D Replaces the stored recall channel
q Push w Push or to select the replacing recall channel. , then push or to replace it.
Replaces the selected channel into the previous channel when push , then. Replaces the selected channel into the behind channel when push , then. (e.g.) Replaces r0 which is stored 121.375 MHz into r1.
D Calling the stored frequencies
Push Push to call the 1st stored frequency. to call the 10th stored frequency.
Appears recall number. Recall number rotation : Push : Push
NOTE: Deletes in order of old recall channel automatically when stored frequencies exceeds 10 channels. 10
I Setting weather alert function
An NOAA broadcast station transmits a weather alert tone before any important weather announcements. When the weather alert function is turned ON, the transceiver detects the alert, and sounds a beep tone until the transceiver is operated. The previously selected (used) weather channel is checked any time during standby, or while scanning. Push , then push [SQLWX-ALERT] to turns the weather alert function ON (Indicates )/OFF (Indicates ).

I Side tone function

When using an optional headset, the transceiver outputs your transmitted voice to the headset for monitoring. Connect the optional headset with the transceiver when using this function (OPC-499 HEADSET ADAPTER and headset are required). (p. 34)
D Setting the side tone level
q Push [PTT] to turn the transmit mode ON. w During transmit mode, rotate [DIAL] to adjust the monitoring level.
ST--0 is OFF and ST--10 is Max. level.
I Accessing 121.5 MHz emergency frequency
The IC-A24 and IC-A6 can quickly gain access to the 121.5 MHz emergency frequency. This function can be activated even when the key lock function is in use. q Push [121.5] for 2 sec. to call the emergency frequency. w Push [CLRDEL] to exit from the emergency frequency.
NEVER operate the transceiver with a headset at high volume levels for long period. A ringing in your ears may occur. If so, reduce the monitor level or discontinue use.

I Setting beep tone

The beep tone which sounds at the push of a switch can be set, if desired. q Push , then push [8BEEP] to enter the beep tone setting mode. w Rotate [DIAL] to set the beep level.
BEP-- 0 is OFF and BEP-- 9 is Max. level.

I Lock function

The lock function prevents accidental frequency changes and accidental function activation. q Push , then push [7 ] to turn the lock function ON. appears. w To turn the function OFF, repeat step q above. disappears. 11
e Push [CLRDEL] to exit the beep tone set mode.

I Backlighting

Push [LIGHT] to turn the display and keypad backlighting ON or OFF.

MEMORY OPERATION

I Memory channel selection
The transceiver has 200 memory channels for storage of often-used frequencies along with 6-character notes. q Push [MRMW] to select memory mode.
Memory BANK number and memory CH. number appears.
I Transferring memory contents
This function transfers a memory channels contents into the frequency mode. This is useful when searching for signals around a memory channels frequency. q Push [MRMW] to select memory mode. w Select the desired memory channel to be transferred using [DIAL] or keypad. e Push , then push [MRMW] to transfer the memory channels contents into the frequency mode. BANK number and memory CH. number disappears as frequency mode is automatically selected and the memory contents are transferred.
Using [DIAL]: w Push [0BANK], then rotate [DIAL] to select the desired memory BANK number, then push [0BANK] (or [CLRDEL]) to exit the BANK selection mode.

BANK appears.

e Rotate [DIAL] to select the desired memory CH. number.
If no memory CH. is programmed in the selected BANK, no memory CH. selection is available.
Using the Keypad: w Push [0BANK], then push appropriate digit key ([0BANK] to [9TAG]) to select the desired memory BANK number, then push [0BANK] (or [CLRDEL]) to exit the BANK-selection mode.

-- -- -- -- -- -- appears on the display.
t Push the appropriate digit key several times to select the desired character as listed at right.
To erase a character, overwrite with a space (displayed as _). To move the cursor forwards or backwards, use [DIAL]. y Push [ENTWX] to program the name. Flashing the memory name stops. When no name is programmed, the display shows the operating frequency. To clear the programmed memory names, push [CLRDEL] before pushing [ENTWX].
EXAMPLE: Programming 125.000 MHz into memory BANK 1/ memory channel 17 with AIR-23 as a comment.

Push Push Push

Push Push Push Push
NOTE: Push [0BANK], then rotate [DIAL] to select the BANK number, if desired. Push [CLRDEL] to continue memory name programming. 15

SCAN OPERATION

I Scan types
The U.S.A. version has 3 scan types to suit your needs. The non-U.S.A. versions have 2 scan types. COM BAND SCAN
108.00 MHz 118.00 MHz Scan Jump

I COM band scan

q Push [CLRDEL] to select the frequency mode. w Push [SQLWX-ALERT] to set the squelch level to the point where noise is just muted. e Push , then push [ANLSCAN] to start the scan.
When a signal is received, the scan pauses until it disappears. To change the scanning direction, rotate [DIAL]. r To stop the scan, push [CLRDEL].
Repeatedly scans 136.975 all frequencies MHz over the entire COM band.

I Memory scan

MEMORY SCAN

non-TAG channel

Mch 2 Mch 1 Mch 19

Mch 6 Mch 7

Mch 10
Repeatedly scans all TAG memory channels. Used for checking often-used channels and bypassing usually busy channels such as control-tower frequencies.
q Push [MRMW] to select memory mode. w Push [SQLWX-ALERT] to set the squelch level to the point where noise is just muted. e Push , then push [ANLSCAN] to start the scan.
WEATHER CHANNEL SCAN Repeatedly scans all TAG weather channels. Weather channels are available for the U.S.A. version only. 16

I Weather channel scan

q Push , then push [ENTWX] to select a weather channel. w Set squelch to the point where noise is just muted. e Push , then push [ANLSCAN] to start the scan.

I TAG channel setting

Memory and weather channels* can be specified to be skipped for the memory and weather channel* scans respectively. The TAG channel function is only available during scan operation.

The course indicator indicates where you are located on a radial from the VOR station. The course indicator shows - - when either aircraft is too far away from the VOR station or the frequency is not set correctly at the VOR station.
r The course deviation needle appears when your aircraft is off course from the VOR station.
or appears to indicate your aircraft is off course to the right or left, respectively. Correct your course until or disappears. Each arrow represents a two-degree deviation. t Push , then push [1DVOR] to exit the CDI mode.
VOR INDICATOR NOTE loc appears on the function display as shown below when a localizer signal is received. However, the function display does not indicate additional information about the localizer signal.
w Select the TO ag when ying to the VOR station, or select the FROM ag when ying away from the VOR station. Push , then push [2TO] to select TO. Push , then push [3FROM] to select FROM. e Push , then push [4CDI] to select the CDI (Course Deviation Indicator) mode.
The course indicator shows OF when the desired VOR signal cannot be received.
NOTE: When the CDI mode is selected, the operating frequency cannot be changed. To set the operating frequency, select the DVOR mode in advance. NOTE: For U.S.A. version only IC-A24s 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. 20
THE AIRCRAFT IS ON COURSE
123.65 VORTAC SEATTLE 116.8 Ch 115 SEA

240 230

N Magnetic north

Des Airc

ou ed c

rse 40

180 170

VOR station

ea aft h

150 140

THE AIRCRAFT IS OFF COURSE
46 ding ft hea Aircra ourse) fc (6 of ourse nc Flow
NOTE: The course deviation indicator appears when the aircraft is off course. In this example, the aircraft is 6 degrees off course to the left. The pilot must turn more than 6 degrees right to get back on course. 21
ould ft sh ircra g 40 A din hea
I Entering a desired course
The IC-A24 shows not only the deviation from the VOR station but the deviation from the desired course. q Push the keypad or rotate [DIAL] to set the frequency for the desired VOR station. Push , then push [2TO] or [3FROM] to change the to-from

I Crosschecking position

q Select 2 VOR stations on your aeronautical chart. w Push the keypad or rotate [DIAL] to set the frequency of one of the VOR station in the DVOR mode.
The course indicator shows course deviation from the VOR radial. Note the radial you are on.
e Push the keypad or rotate [DIAL] to set the frequency of the other VOR station in DVOR mode.
Note the radial from the station you are on.
w Push , then push [4CDI] to select CDI mode. e Set the desired course to the VOR station using the tuning dial or keypad.
or appears on the function display when your aircraft is off the desired course. When your heading is correct, the ABSS function (see right column for detail) may be useful instead of course input.
r Extend the radials from each VOR station on the chart. Your aircraft is located at the point where the lines intersect.
r The course deviation needle points to the right when your aircraft is off course to the left.
To get back on course, y right more than the number of degrees indicated by the CDI arrows. If the overow indicator appears on the right side, select a heading plus 10 degrees to the desired course; if the overow indicator appears on the left side, select a heading minus 10 degrees.
ABSS FUNCTION In the CDI mode, the Auto Bearing Set System (ABSS) adds or subtracts the number of degrees indicated by the CDI arrows from the Omni Bearing Selector (OBS). To use ABSS, push , then push [2TO] while using the TO ag; or, push , then push [3FROM] while using the FROM ag.
q w e r q Overflow indicator (left) w Course deviation needles (left) e Course deviation needles (right) r Overflow indicator (right)
EXAMPLE: Entering the desired course bearing 65 to a VOR station.

CROSSCHECKING POSITION

VORTAC OLYMPIA 113.4 Ch 81 OLM

110 120

I Duplex operation
The duplex function allows you to call a ight service station while receiving a VOR station. The duplex function requires frequency programming for the flight service station in advance.
D Operating the duplex function
q Set the desired frequency in NAV band. w Push ON.
NAV band frequency range: 108.00117.975 MHz , then push [6DUP] to turn the duplex function DUP appears on the function display.
D Programming a duplex frequency

mode. transferred.

MW] to enter memory
q Push [MRMW] to enter the memory CH mode.
w Select the desired channel to be
, then push [MR MW]. e Push BANK number and memory CH number disappears as frequency mode is automatically selected and the memory contents are transferred.
, then push [0 BANK] to enter the BANK selection mode.
w Select the desired frequency or WX
CH.* , then push [MR MW] to e Push enter memory programming mode. M, BANK and memory numbers blink on the display.
e Push keypad (or rotate [DIAL]) to select the desired BANK number (BANK 0 to 9).
Push , then push [0 BANK] (or push [ENT WX]) to set the BANK number and exit the BANK selection mode. Push [CLR DEL] to exit the BANK selection mode.
r Rotate [DIAL] (or push keypad) to select a desired memory CH number (0 to 19). Push [0 BANK], then select the BANK number if desired. Push [0 BANK] to exit the BANK selection mode. t Push [ENT WX] to program the memory contents.

n LOCK FUNCTION (p. 9)

,Then push [7 ] to turn q Push the key lock function ON. appears on the display. ,Then push [7 ] to turn w Push the keylock function OFF.

n TAG CHANNELS (p. 17)

q Push [MR

MW] to select the mem-

ory mode.
, then [9 TAG] to turn the channel TAG ON and OFF. *WX CH available U.S.A. version only.
OPTIONAL HEADSET CONNECTION
D OPC-499 (HEADSET ADAPTER) connection
When using a headset, such as those from the David Clark Co. via the OPC-499 HEADSET ADAPTOR adapter, the transceiver outputs your transmitted voice to the headset for monitoring. See I Side tone function (p. 11) when setting the side tone level.

PTT switch

Use a PTT switch with a 3.5 mm (1/8") diameter plug, if required.

OPC-499

HEADSET
(Must be purchased separately)

IC-A24/A6

A-6403D-1EX Printed in Japan 2004 Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan