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

							5SCAN OPERATION
17
Weather channel scan 
(U.S.A. version only)
qPush  , then push [ENT (WX)] to select a weather
channel.
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].
“TAG” channels
Memory 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] to select memory mode; or, push  , then
push [ENT (WX)] to select a weather channel*.
wSelect the desired channel to be a “TA G”channel.
ePush  , then push [9 (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 19 is
scanned during memory
scan.Memory channel 19 is
skipped during scan.
Shows the 
“TA G” channel.then 
						

							18
6VOR NAVIGATION (IC-A23 ONLY)
VOR indicators
214
34
FROM
COM BAND
(118.00–136.975 MHz)NAV BAND (108.00–117.975 MHz)
DVOR MODE
Function display of the IC-A23 General VOR equipmentTo-from flag 
indicator
CDI MODE Course indicator
Course
indicatorCourse deviation needles
Overflow indicatorPush [F] then [r CDI]. Push [F] then [q DVOR].
To-from flag indicator
Course indicator
Course deviation 
needle To-from flag indicator
Two-degree deviation 
marks
VOR NAVIGATION 
						

							19
6VOR NAVIGATION
VOR functions
◊To select CDI mode
To show the deviation between your flying course and the de-
sired course, push  , then [4 (CDI)].
◊To select DVOR mode
When entering the NAV band, 108.000–117.975 MHz, the
IC-A23 selects DVOR mode automatically.
To show your aircraft’s direction to (or from) the VOR station,
push  , then [1 (DVOR)].
◊‘TO’or ‘FROM’flag selection
The 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.
To change the flag from ‘TO’to ‘FROM’or vice versa, push
, then [3 (FROM)] or [2 (TO)], respectively.
•When using the ‘TO’flag and passing through the VOR
station, the ‘TO’flag changes to the ‘FROM’flag automat-
ically.
•When turning power ON, the ‘FROM’flag is selected au-
tomatically.
◊Selecting the next VOR station when using
CDI mode
(when using the course deviation needle)
qPush  , then [1 (DVOR)].
wSet the next VOR station’s frequency.
ePush  , then [4 (CDI)].
•Select ‘TO’or ‘FROM’flag, if desired.
Operating frequency can be changed.
Course indicator shows your direction 
to (or from) the VOR station. Course deviation needle does not 
appear.
Operating frequency cannot be changed.
Course indicator is fixed, but it can be 
changed with the tuning dial or keypad. Each course deviation arrow indicates 
a two-degree deviation.
VOR NAVIGATION 
						

							20
6VOR NAVIGATION
Flying to a VOR station
The IC-A23 shows the deviation from a VOR station.
qSelect a VOR station on your aeronautical chart and set
the frequency of the station.
•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.
•To select ‘TO,’push ,then [2 (TO)].
•To select ‘FROM,’push 
,then [3 (FROM)].
ePush  , then [4 (CDI)] to select CDI (Course Deviation
Indicator) mode.
•The course indicator shows ‘OF’when the desired VOR signal
cannot be received.
When CDI mode is selected, the operating frequency can-
not be changed. To set the operating frequency, select
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 ‘≈’disappears.
Each arrow represents a two-degree deviation.
tTo exit CDI mode, push  , then [1 (DVOR)].
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.
VOR NAVIGATION 
						

							21
6VOR NAVIGATION
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 course
Aircraft heading 40
°
  123.65
VORTAC
SEATTLE
116.8 Ch 115 SEATHE 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 SEATHE AIRCRAFT IS OFF COURSE
The course deviation indicator ap-
pears 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.
VOR NAVIGATION 
						

							22
6VOR NAVIGATION
Entering a desired course
The IC-A23 shows not only the deviation from the VOR sta-
tion but the deviation from the desired course.
qSet the frequency for the desired VOR station.
•To change the to-from flag, push ,then [2 (TO)] or [3
(FROM)].
wPush  , then [4 (CDI)] to select CDI mode.
eSet the desired course to the VOR station using the tuning
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 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 position
qSelect 2 VOR stations on your aeronautical chart.
wSet the frequency of one of the VOR station in DVOR
mode.
•The course indicator shows course deviation from the VOR ra-
dial. Note the radial you are on.
eSet 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 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 [2 (TO)] while using the ‘TO
flag; or, push  , then [3 (FROM)] while using the ‘FROM’
flag.
VOR NAVIGATION 
						

							23
6VOR NAVIGATION
EXAMPLE:Entering the desired course bearing 89°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
OLYMPIA116.8 Ch 115 SEA123.65
VORTAC
SEATTLE
CROSSCHECKING POSITION
VOR NAVIGATION 
						

							24
6VOR NAVIGATION
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.
◊Programming a duplex frequency
qPush [CLR] to select frequency mode.
wSet a NAV band frequency using the tuning dial or keypad.
•NAV band frequency range: 108.00–117.975 MHz
ePush  , then [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]
after setting a frequency.
•The displayed frequency returns to the NAV band frequency.
◊Operating the duplex function
qSet the desired frequency in NAV band.
•NAV band frequency range: 108.00–117.975 MHz
wPush  , then [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 [6 (DUP)] to cancel the function.
A duplex frequency can be programmed into each mem-
ory 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.
VOR NAVIGATION 
						

							25
7BATTERY PACKS
Charging
precautions
NEVER connect two or more chargers
at the same time.
Charging may not occur under temper-
atures of 10°C (+50°F) or over temper-
atures of 40°C (+104°F).
When using BC-119:If the charge
indicator flashes orange, vehicle bat-
tery voltage is low and charging is
not possible. Check the vehicle bat-
tery voltage in this case. If the charge
indicator flashes red, there may be a
problem with the battery pack (or
charger). Re-insert the battery pack
or contact your dealer.
Battery pack
charging
The BP-200L BATTERY PACKincludes
rechargeable Ni-MH batteries and can
be charged approx. 300 times. Charge
the battery pack before first operating
the transceiver or when the battery
pack becomes exhausted.
If you want to be able to charge the bat-
tery pack more than 300 times, the fol-
lowing points should be observed:
1. Avoid overcharging. The charging pe-
riod should be less than 48 hours.
2. Use the battery until it becomes al-
most completely exhausted under
normal conditions. We recommend
battery charging just after transmitting
becomes impossible.
DRapid charging with the BC-119
The optional BC-119 provides rapid
charging of battery packs.
One AD-87 and an AC adapter (may be
supplied with the BC-119 depending on
version) are additionally required.
qFix the optional AD-88 
TERMINAL PC
BOARD FOR CHARGER
into the BC-
119 with the 4 supplied screws.
wInsert the optional AD-87A* 
CHARGE
ADAPTER 
into the charging slot of
the BC-119.
eInsert the optional AD-87B* 
CHARGE
ADAPTER 
into the AD-87A* CHARGE
ADAPTER.
rInsert the battery pack, either by it-
self or attached to the transceiver,
into the whole assembly for charg-
ing. (p. 26)
*AD-87A and AD-87B supplied together named
as AD-87.
•Charging period:1.5 to 2 hours 
						

							26
7BATTERY PACKS
DRapid charging with the BC-119DRegular charging
qAttach the battery pack to the transceiver.
wBe sure to turn the transceiver power OFF.
eConnect the Wall charger (BC-110A) or optional cable
(CP-12L or OPC-254L) as shown below.
•Charging period:15 hours 

IC-A23/A5 with
attached
battery case
Wall charger
CP-12L
(optional)
OPC-254L
(optional)
To a 12 to 
14 V DC
power source To
[CHARGE]white
black
*AD-87B
(supplied with AD-87A)
AD-88
(optional) Check orientation
for correct charging
AD-87A
(optional)
BC-119
(optional)
*