Icom Ic-A234, Ic-A6 Vhf Air Band Transceiver Instruction Manual

							16
5
SCAN OPERATION
Scan typesThe U.S.A. version has 3 scan types to suit your needs. The
non-U.S.A. versions have 2 scan types.
COM band scanqPush [CLR•DEL] to select the frequency mode.
wPush [SQL•
WX-ALERT
] to set the squelch level to the point
where noise is just muted.
ePush  , then push [ANL•
SCAN
] to start the scan.
• When a signal is received, the scan pauses until it disappears.
•To change the scanning direction, rotate [DIAL].
rTo stop the scan, push [CLR•
DEL
].
Memory scanqPush [MR•
MW
] to select memory mode.
wPush [SQL•
WX-ALERT
] to set the squelch level to the point
where noise is just muted.
ePush  , then push [ANL•
SCAN
] to start the scan.
• When a signal is received, the scan pauses until it disappears.
•To change the scanning direction, rotate [DIAL].
rTo stop the scan, push [CLR•
DEL
].
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 chan-
nels. Used for checking
often-used channels
and bypassing usually
busy channels such as
control-tower frequen-
cies.COM BAND SCAN
Repeatedly scans
all frequencies
over the entire
COM band.108.00
MHz
Scan
Jump 118.00
MHz136.975
MHz
non-TAG
channel non-TAG channel
Mch 2
Mch 4
Mch 6Mch 7
Mch 1
Mch 8
Mch 10
Mch 19
45 
						

							17
5
SCAN OPERATION
Weather channel scan 
(U.S.A. version only)
qPush  , then push [ENT•
WX
] to select a weather chan-
nel.
wSet squelch to the point where noise is just muted.
ePush  , then push [ANL•
SCAN
] to start the scan.
• When a signal is received, the scan pauses until it disappears.
•To change the scanning direction, rotate [DIAL].
rTo stop the scan, push [CLR•
DEL
].
“TA G” channel settingMemory and weather channels* can be specified to be
skipped for the memory and weather channel* scans respec-
tively. The “TA G” channel function is only available during
scan operation.
qPush [MR•
MW
] to select memory mode; or, push  , then
push [ENT•
WX
] to select a weather channel.*
wSelect the desired memory channel to be a “TA G” chan-
nel.
ePush 
,then push [9•
TA G
] to set a “TAG.”
•“TA G” appears.
•Non-“TA G” channels are skipped during scan.
rTo cancel the “TA G” setting, repeat above steps.
*Weather channel: U.S.A. version only.
Memory channel 15 is
scanned during memory
scan.Memory channel 15 is
skipped during scan.
Push then
Appears the “TA G” indicator. 
						

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6
VOR NAVIGATION (IC-A24 ONLY)
VOR indicators
21434
FROM
COM BAND
(118.00  136.975 MHz)
NAV BAND (108.00  117.975 MHz)
DVOR MODE
Function display of the IC-A24 General VOR equipmentTo-from flag 
indicator
CDI MODE Course indicator
Course
indicator
Course deviation needles
Overflow indicatorPush [F] then [4 
CDI
]. Push [F] then [1 
DVOR
].
To-from flag indicator
Course indicator
Course deviation 
needle To-from flag indicator
Two-degree deviation 
marks
56 
						

							19
6
VOR NAVIGATION (IC-A24 ONLY)
VOR functionsDTo select the CDI modeTo show the deviation between your flying course and the de-
sired course, push  , then push [4•
CDI
] to select the CDI
mode.
DTo select the DVOR modeWhen entering the NAV band, 108.000–117.975 MHz, the
IC-A24 selects the DVOR mode automatically.
To show your aircraft’s direction to (or from) the VOR station,
push  , then push [1•
DVOR
] to select the DVOR mode.
D‘TO’or ‘FROM’flag selectionThe to-from flag indicators indicate whether the VOR naviga-
tion information is based on a course leading to the VOR sta-
tion or leading away from the VOR station.
Push  , then push [3•
FROM
] or [2•
TO
] to change the flag
from ‘TO’to ‘FROM’or vice versa, respectively.
NOTE:
•When using the ‘TO’flag and passing through the VOR station,
the ‘TO’flag changes to the ‘FROM’flag automatically.
•When turning power ON, the ‘FROM’flag is selected automati-
cally.
DSelecting the next VOR station when using
CDI mode
(when using the course deviation needle)
qPush  , then push [1•
DVOR
] to select the DVOR mode.
wPush the keypad or rotate [DIAL] to set the next VOR sta-
tion’s frequency.
ePush  , then push [4•
CDI
] to select the CDI mode.
•Select ‘TO’or ‘FROM’flag, if desired.
Operating frequency can not be 
changed.
Each course deviation arrow 
indicates a two-degree deviation.
Course indicator is fixed, but it 
can be changed with the tuning 
dial or keypad.Operating frequency can not be 
changed.
Course deviation needle does not 
appear.
Course indicator shows your 
direction to (or from) the VOR 
station. 
						

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6
VOR NAVIGATION (IC-A24 ONLY)
Flying to a VOR stationThe IC-A24 shows the deviation from a VOR station.
qSelect a VOR station on your aeronautical chart and push
the keypad or rotate [DIAL] to set the frequency of the sta-
tion.
•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.
wSelect the ‘TO’flag when flying to the VOR station, or se-
lect the ‘FROM’flag when flying away from the VOR sta-
tion.
• Push 
,then push [2•
TO] to select ‘TO’.
• Push 
,then push [3•
FROM
] to select ‘FROM’.
ePush  , then push [4•
CDI
] to select the CDI (Course De-
viation Indicator) mode.
•The course indicator shows ‘OF’when the desired VOR signal
cannot be received.NOTE:When the CDI mode is selected, the operating fre-
quency cannot be changed. To set the operating fre-
quency, select the DVOR mode in advance.rThe course deviation needle appears when your aircraft is
off course from the VOR station.
•‘Ω’or ‘≈’appears to indicate your aircraft is off course to the right
or left, respectively. Correct your course until ‘Ω’or ‘≈’disap-
pears. Each arrow represents a two-degree deviation.
tPush  , then push [1•
DVOR
] 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.NOTE: For U.S.A. version only
IC-A24’s VOR and CDI Navigation features are supplemen-
tal aids to navigation only, and are not intended to be a sub-
stitute for accurate (primary) VOR/CDI or landing service
equipment.
6 
						

							21
6
VOR NAVIGATION (IC-A24 ONLY)
VOR
station
0  10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
110  
120  
130  
140  
150   160   170   180   190   200   210   220   230   240  250  260  270  280  290  300  310  320  330  
340  
350  
N
Magnetic
north
Desired courseAircraft heading 40  
  123.65
VORTAC
SEATTLE
116.8 Ch 115 SEA
THE AIRCRAFT IS ON COURSE
VOR
station
0  
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
110  
120  
130  
140  
150   160   170   180   190   200   210   220   230   240  250  260  270  280  290  300  310  320  330  
340  
350  
N
Magnetic
north
Aircraft should be
heading 40 
Aircraft heading 46 
(6  off course)
Flown course  123.65
VORTAC
SEATTLE
116.8 Ch 115 SEA
THE AIRCRAFT IS OFF COURSE
NOTE:The course deviation indica-
tor 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. 
						

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6
VOR NAVIGATION (IC-A24 ONLY)
Entering a desired courseThe IC-A24 shows not only the deviation from the VOR sta-
tion but the deviation from the desired course.
qPush the keypad or rotate [DIAL] to set the frequency for
the desired VOR station.
•Push 
,then push [2•
TO] or [3•
FROM
] to change the to-from
flag.
wPush  , then push [4•
CDI
] to select CDI mode.
eSet the desired course to the VOR station using the tun-
ing dial or keypad.
•‘Ω’or ‘≈’appears on the function display when your aircraft is off
the desired course.
•When your heading is correct, the ABSS function (see right col-
umn for detail) may be useful instead of course input.
rThe course deviation needle points to the right when your
aircraft is off course to the left.
•To get back on course, fly right more than the number of degrees
indicated by the CDI arrows.
•If the overflow indicator appears on the right side, select a head-
ing plus 10 degrees to the desired course; if the overflow indica-
tor appears on the left side, select a heading minus 10 degrees.
Crosschecking positionqSelect 2 VOR stations on your aeronautical chart.
wPush 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 ra-
dial. Note the radial you are on.
ePush 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.
rExtend the radials from each VOR station on the chart.
Your aircraft is located at the point where the lines inter-
sect.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 [2•
TO
] while using the
‘TO’flag; or, push  , then push [3•
FROM
] while using the
‘FROM’flag.
q
wOverflow indicator (left)
Overflow indicator (right) Course deviation needles (left)
e
rCourse deviation needles (right)
wer q
6 
						

							23
6
VOR NAVIGATION (IC-A24 ONLY)
EXAMPLE:Entering the desired course bearing 65°to a VOR station.
VOR
station
0  
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
110  
120  
130  
140  
150   160   170   180   190   200   210   220   230   240  250  260  270  280  290  300  310  320  330  
340  
350  
N
Magnetic
north
VOR
station
0  
10  
20  
30  
40  
50  
60  
70  
80  
90  
100  
110  
120  
130  
140  
150   160   170   180   190   200   210   220   230   240  250  260  270  280  290  300  310  320  330  
340  
350  
113.4 Ch 81 OLMVORTAC
OLYMPIA
116.8 Ch 115 SEA123.65
VORTAC
SEATTLE
CROSSCHECKING POSITION 
						

							24
6
VOR NAVIGATION (IC-A24 ONLY)
Duplex operation 
(U.S.A. version only)
The duplex function allows you to call a flight service station
while receiving a VOR station. The duplex function requires
frequency programming for the flight service station in ad-
vance.DProgramming a duplex frequencyqPush [CLR•
DEL
] to select the frequency mode.
wSet a NAV band frequency using the tuning dial or keypad.
•NAV band frequency range: 108.00–117.975 MHz
ePush  , then push [5•
DUP-W
].
•“DUP” flashes and transmit frequency appears.
rSet the frequency of the flight service station using the tun-
ing dial or keypad. When using the tuning dial, push
[ENT•
WX
] after setting a frequency.
•The displayed frequency returns to the NAV band frequency.
DOperating the duplex functionqSet the desired frequency in NAV band.
•NAV band frequency range: 108.00–117.975 MHz
wPush  , then push [6•
DUP
] to turn the duplex function
ON.
•“DUP” appears on the function display.
ePush and hold [PTT] to transmit at the pre-programmed
transmit frequency.
rRelease [PTT] to return to receive.
tPush  , then push [6•
DUP
] to cancel the function.
•“DUP” disappears on the function display.NOTE:A duplex frequency can be programmed into each
memory channel independently. Set a duplex frequency
before programming the memory channel, if desired. The
duplex ON/OFF setting can also be programmed into a
memory channel.
EXAMPLE:Programming 123.65 MHz as the transmit frequency in the duplex function.
6 
						

							25
7
BATTERY PACKS
Battery chargingPrior to using the transceiver for the first time, the battery
pack must be fully charged for optimum life and operation.
CAUTION:To avoid damage to the transceiver, turn the
power OFF while charging.
• Recommended temperature range for charging: 
+10°C to +40°C (+50°F to +104°F)
- The Li-Ion battery (optional) is functioning within –20°C to
+60°C (–4°F to +140°F)
• Use the supplied AC adapter on regular charging. NEVER
use another manufacture’s adapters.
• Use the specified chargers (BC-119N, BC-121N and 
BC-144N). NEVERuse another manufacture’s charger.
NEVER connect DC power to the transceiver when in-
stalling Alkaline batteries. Such a connection will damage
the transceiver.DRecycling information (U.S.A. only)
The product that you have purchased contains a
rechargeable battery. The battery is recyclable.
At the end of its life, under various state and
local laws, it may be illegal to dispose of this bat-
tery into the municipal waste stream. Call 1-800-
822-8837 for battery recycling options in your
area or contact your dealer.
Battery cautionsCAUTION! NEVER
insert battery pack/transceiver
(with the battery pack attached) with wet or soiled into the
charger. This may result in corrosion of the charger terminals
or damage to the charger. The charger is not waterproof and
water can easily get into it.
NEVER
incinerate used battery packs. Internal battery gas
may cause an explosion.
NEVER
immerse battery pack in water. If the battery pack
becomes wet, be sure to wipe it dry immediately (particularly
the battery terminals BEFORE attaching it to the transceiver. 
NEVER
short the terminals of the battery pack. Also, cur-
rent may flow into nearby metal objects, such as a necklace,
etc. Therefore, be careful when carrying with, or placing near
metal objects, carrying in handbags, etc.
If your battery pack seem to have no capacity even after
being charged, completely discharge them by leaving the
power ON overnight. Then, fully charge the battery pack
again. If the batteries still do not retain a charge (or very little),
new battery pack must be purchased.
Turn the transceiver power OFF when charging the battery
pack. Otherwise, the battery pack may not fully charge or
charge properly.