Icom Ic-A23, Ic-a5 Vhf Air Band Transceiver Instruction Manual

							7
2PANEL DESCRIPTION
!0MEMORY BANK NUMBER INDICATOR(p. 12)
Shows the selected memory bank number.
!1FREQUENCY DISPLAY (p. 8)
➥Shows the operating frequency.
➥Shows the channel name when the memory name func-
tion is selected.
!2COURSE INDICATORS (IC-A23 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.!3TO-FROM INDICATOR (IC-A23 only) (p. 19)
➥Indicates whether the VOR navigation information is
based on a course leading to the VOR station or lead-
ing away from the VOR station.
!4COURSE DEVIATION NEEDLES (IC-A23 only) (p. 22)
➥Indicates the deviation between the desired course and
your actual flying course every 2 degrees.
!5OVERFLOW INDICATOR (IC-A23 only) (p. 22)
➥Appears when the deviation between the desired course
and flying course is over 10 degrees.
!5
!4!3!2
Function display (COM/NAV) 
						

							8
3BASIC OPERATION
DIAL↔[Y]/[Z] trade function
The transceiver is equipped [DIAL]↔[Y]/[Z] keys trade func-
tion. Push  then push [CLR (DIAL/YZ)] to trade each
function.
Default setting:
DIAL:•Setting the frequency, •Selecting the memory chan-
nel, •Selecting the bank number
YZkeys:•Increasing or decreasing the audio level
Following explanation is according to the default setting.
Setting a frequency
ïUsing keypad
qPush [PWR] for 0.5 sec. to turn power ON, then push
[CLR] to select the frequency mode when memory CH
number or WX CH number appears on the function display.
wPush 5 appropriate digit keys to input the frequency.
•Enter [1] as the 1st digit.
• When a digit is mistakenly input, push [CLR] to clear,
then start again.
•Push [ENT] to enter consecutive zero digits.
•Only [2], [5], [7] and [0] can be entered as the 5th and
final digit.
ïUsing the tuning dial
qPush [PWR] for 0.5 sec. to turn power ON, then push
[CLR] to select the VFO mode when memory CH number
or WX CH number appears on the function display.
wRotate the [DIAL] to set the desired frequency.
eTo select the 1 MHz tuning step, push 
, then rotate the
tuning dial. Push  again to return the normal tuning.
Accessing 121.5 MHz emer-
gency frequency
The IC-A23 and IC-A5 can quickly access the 121.5 MHz
emergency frequency. This function can be activated even
when the key lock function is in use.
qPush  , then push [121.5] to call the emergency fre-
quency.
wPush [CLR] to exit from the emergency frequency. 
						

							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.
qPush 
,then push
[ENT (WX)] to select WX
channel mode.
•“WX--”and previously se-
lected channel number ap-
pears.
wRotate the [DIAL] to select the desired WX channel.
ePush [CLR] to exit the WX channel mode and return to fre-
quency mode.
Setting squelch level
The transceiver has a noise squelch circuit to mute undesired
noise while receiving no signal.
DSetting the squelch level
qPush [SQL], then rotate the [DIAL] (or using [Y]/[Z]key)
to select the squelch level.
• ‘SQL--0’is loose squelch and ‘SQL--24’is tight squelch.
•Rx indicator turns to green during the squelch is open.
wPush [SQL] or [CLR] to exit the squelch set mode.
Side tone function
When using an optional headset, such as those from the
David Clark Co. via the OPC-967
HEAD SET ADAPTOR, the
transceiver outputs your transmitted voice to the headset for
monitoring. (p. 32)
DSetting the side tone level
qPush [PTT] to turn the transmit mode ON.
wDuring transmit mode, push [Y]/[Z] several times to adjust
the monitoring level.
• ‘ST--0’is OFF and ‘ST--15’is Max. level.
NEVERoperate the transceiver with a headset at high vol-
ume levels for long period. A ringing in your ears may
occur. If so, reduce the monitor level or discontinue use.
Beep tone
The beep tone which sounds each times a switch is pushed
can be adjusted, as desired.
qPush 
, then push [BEEP].
wRotate [DIAL] (or using [Y]/[Z] key) to adjust the beep
level
.
ePush [CLR] to exit the beep tone set mode.
• ‘BEP-0’is OFF and ‘BEP--9’is Max. level.
9
3BASIC OPERATION 
						

							10
3BASIC OPERATION
Lock function
The lock function prevents accidental frequency changes and
accidental function activation.
qPush  , then push [KEY LOCK] to turn the function ON.
wTo turn the function OFF,repeat step qabove.
•“ ”disappears.
Display backlighting
Push [LIGHT] to turn the display backlighting ON or OFF.
Low battery indicator
Low battery indicator appears when the battery power has
decreased to a specified level. The attached battery pack re-
quires recharging.
REC/PLAY the signals
/messages
DRecording a signal
/message
➥Push  , then push [ANL
(REC)] to start to record the
message for 20 sec.
• ‘REC’blinks on the display.
•Push [CLR] to cancel the recording.
•No message is recorded when no audio comes from the speaker.
(e.g. When the squelch is closed.)
•You can record your own message by pushing and holding [PTT]
during the recording mode. Frequency or memory CH display
disappears in this case.
•No transmission available during the recording mode.
• Only the latest message is remains.
DPlay
➥Push  , then push
[BANK (PLAY)] to play back
the message.
• ‘PLAY’appears on the dis-
play.
• Push [CLR] to cancel the
play back.
•Play back the message during the transmit mode, you can trans-
mit the recorded message.
then
thenLow battery
indicator 
						

							11
3BASIC OPERATION
Receiving
qPush [PWR] to turn the power ON.
wPush [SQL], then turn the [DIAL] counterclockwise (or [Z]
key) to select the squelch level [0].
ePush [Y]/[Z] key several times to adjust the audio level.
rPush [SQL], then turn the [DIAL] clockwise (or [Y]key)
until the noise is muted.
•The Tx/Rx indicator disappears.
tSet the desired frequency using the [DIAL] or keypad.
yPush [ANL] to reduce pulse noise such as that caused by
engine ignition systems, if necessary.
•[ANL] appears on the display.
uWhen a signal is received on the set frequency:
• The Tx/Rx indicator lights green
• Squelch opens and audio is emitted from the speaker.
When the [SQL] control is too “deep”, squelch may not open
for weak signals. To receive weak signals, set the squelch to a
“loose”position.
Transmitting
qSet the desired frequency in COM band using the [DIAL]
or keypad.
•COM band frequency range: 118.00–136.975 MHz
wPush and hold [PTT] to transmit.
•The Tx/Rx indicator lights red.
eSpeak into the microphone at a normal voice level.
•DO NOThold the transceiver too close to your mouth or
speak too loudly. This may distort the signal.
rRelease [PTT] to return to receive.
CAUTION:Transmitting without an antenna may damage
the transceiver.
NOTE:To prevent interference, listen on the frequency be-
fore transmitting. If the frequency is busy, wait until the
channel is clear. 
						

							12
4MEMORY OPERATION
Memory channel selection
The transceiver has 200 memory channels for storage of
often-used frequencies along with 6-character notes.
qPush [MR] to select memory mode.
•Memory BANK number and memory CH number appears.Using the [DIAL]:
wPush [BANK], then rotate the [DIAL] to select the desired
memory bank number, then push [BANK] (or [CLR]) to exit
the bank selection mode.
• “BANK”appears.
eRotate [DIAL] to select the desired memory CH number.
•If no memory channel is programmed in the selected bank, no
memory CH selection is available.
Using the Keypad:
wPush [BANK], then push appropriate digit key (0 to 9) to
select the desired memory bank number, then push
[BANK] (or [CLR]) to exit the bank-selection mode.
• “BANK”appears.
ePush 2 appropriate digit key (00 to 19) to select the de-
sired memory CH number.
•If no memory channel is programmed in the selected bank, no
memory CH selection is available.
Comments appear first when programmed, however, the
transceiver can be programmed by your dealer to show
the operating frequency first. Push [MR] to display the
comment in this case.
Transferring memory
contents
This function transfers a memory channel’s contents into the
frequency mode. This is useful when searching for signals
around a memory channel’s frequency.
qPush [MR] to select memory mode.
wSelect the desired memory channel to be transferred using
the [DIAL] or keypad.
ePush  , then push [MR].
•BANK number and memory CH number disappears as
frequency mode is automatically selected and the mem-
ory contents are transferred.
then
Memory modeFrequency mode 
						

							13
4MEMORY OPERATION
Programming a memory
channel
The transceiver has 200 (10 BANK x 20 CH) memory chan-
nels for storage of often-used frequencies.
qPush [CLR] to select Frequency mode, if necessary.
wSelect the desired frequency.
• Push 
, then push [ENT (WX)] to select a weather channel.*
•Set the desired frequency or WX channel* using the [DIAL] or
keypad.
ePush 
, then push [MR (MW)].
•Memory BANK and memory channel number appears.
rRotate the [DIAL] to select the desired memory channel
number.
•[M] blinks.
•Push [BANK] to select the BANK number if desired. Push [CLR]
(or [BANK]) to exit the BANK selection mode.
tPush [ENT] to program the information into the channel
and return to Frequency mode.
*Weather channel: U.S.A. version only.
then[0], [5] or [5] [ENT]
then
[3]
[0], [2] or [2] then [ENT] 
or
• EXAMPLE:Programming WX-05* into memory BANK 3/
memory channel 2. 
						

							14
4MEMORY OPERATION
Memory names
ïProgramming memory names
The memory channel can display a 6-character comment as
well as a frequency.
qRotate the [DIAL] to select the desired frequency in Fre-
quency mode.
wPush 
,then push [MR].
eRotate the [DIAL] to select the desired memory channel to
be programmed.
•Push [BANK] to select the BANK number if desired. Push [CLR]
to exit the BANK selection mode.
rPush [MR] to enter the memory name programming mode.
•“-- -- -- -- -- -- ”appears on the display.
tPush 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].
yPush [ENT] to program the name.
•Flashing stops.
•When no name is programmed, the display shows the operating
frequency.
•To clear the entered comment, push [CLR] before pushing [ENT].
key Character 
1 1, Q, Z
4 4, G, H, I
7 7, P, R, S
ENT Programkey Character
2 2, A, B, C
5 5, J, K, L
8 8, T, U, V
0 0, space –key Character 
3 3, D, E, F
6 6, M, N, O
9 9, W, X, Y
ïClearing memory contents
Unwanted memory channels can be cleared. Programming
over a memory channel also clears the previously pro-
grammed contents. Memory channel 1 cannot be cleared.
qSelect the memory channel to be cleared.
wPush
, then push and hold [CLR] for 1 sec.
•“-- -- -- -- -- --”appears momentarily, then the next selec-
table channel appears. 
						

							15
4MEMORY OPERATION
[CLR], [1], [2], [5], [ENT] [F], [MR(MW)]
[1], [5]
(*see NOTE)
[MR] [2], [2], [4], [4], [4], [4] [7], [7], [7]
[0], [0], [0],[2],[3] [ENT]
• EXAMPLE:Programming 125.000 MHz into memory BANK 0/ memory channel 15
with “AIR-23”as a comment.
*NOTE:Push [BANK], then rotate the [DIAL] to select the
BANK number, if desired. Push [CLR] to continue memory
name programming. 
						

							SCAN OPERATION5
16
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
qPush [CLR] to select VFO mode.
wSet squelch to the point where noise is just muted.
ePush   , then push [SQL (SCAN)] to start the scan.
• When a signal is received, the scan pauses until it disap-
pears.
•To change the scanning direction, rotate the [DIAL].
rTo stop the scan, push [CLR].
Memory scan
qPush [MR] to select memory mode.
wSet squelch to the point where noise is just muted.
ePush   , then push [SQL (SCAN)] to start the scan.
• When a signal is received, the scan pauses until it disap-
pears.
•To change the scanning direction, rotate the [DIAL].
rTo stop the scan, push [CLR].
WEATHER CHANNEL SCAN
Repeatedly scans all “TA G”weather channels. Weather
channels are available for the U.S.A. version only.
MEMORY SCAN
Repeatedly scans all
“TA G”memory channels.
Used for checking often-
used channels and by-
passing usually busy
channels such as control-
tower frequencies..
COM BAND SCAN
Repeatedly scans all  fre-
quencies over the entire
COM band.
 Scan
Jump 108.00
MHz
118.00
MHz136.975
MHz
non-TAG
channel non-TAG channel
Mch 1
Mch 7 Mch 2 Mch 4
Mch 6
Mch 8
Mch 19 Mch 10