Icom IC-910H User Manual

INSTRUCTION MANUAL

VHF/UHF
ALL MODE TRANSCEIVER

i910H

IMPORTANT

WORD

R

WARNING

CAUTION

NOTE

DEFINITION

Personal injury, fire hazard or electric
shock may occur.

If disregarded, inconvenience only.
No risk of personal injury, fire or
electric shock.

Equipment damage may occur.

READ THIS INSTRUCTION MANUAL
CAREFULLY before attempting to operate the

transceiver.

SAVE THIS INSTRUCTION MANUAL. This

manual contains important safety and operating in­structions for the IC-910H.

PRECAUTIONS

EXPLICIT DEFINITIONS

R WARNING HIGH VOLTAGE! NEVER at-

tach an antenna or internal antenna connector during
transmission. This may result in an electrical shock or
burn.

R NEVER apply AC to the [DC13.8V] jack on the

transceiver rear panel. This could cause a fire or ruin
the transceiver.

R NEVER apply more than 16 V DC, such as a 24 V

battery, to the [DC13.8V] jack on the transceiver rear
panel. This could cause a fire or ruin the transceiver.

R NEVER let metal, wire or other objects touch any

internal part or connectors on the rear panel of the
transceiver. This may result in an electric shock.

R NEVER expose the transceiver to rain, snow or

any liquids.

AVOID using or placing the transceiver in areas with
temperatures below –10°C (+14°F) or above +60°C
(+140°F). Be aware that temperatures on a vehicle’s
dashboard can exceed 80°C (+176°F), resulting in per­manent damage to the transceiver if left there for ex­tended periods.

AVOID placing the transceiver in excessively dusty en­vironments or in direct sunlight.

AVOID placing the transceiver against walls or putting
anything on top of the transceiver. This will obstruct
heat dissipation.

Place unit in a secure place to avoid inadvertent use
by children.

During mobile operation, DO NOT operate the trans­ceiver without running the vehicle’s engine. When the
transceiver power is ON and your vehicle’s engine is
OFF, the vehicle’s battery will soon become ex­hausted.

Make sure the transceiver power is OFF before start­ing the vehicle. This will avoid possible damage to the
transceiver by ignition voltage spikes.

During maritime mobile operation, keep the transceiver
and microphone as far away as possible from the mag­netic navigation compass to prevent erroneous indica­tions.

BE CAREFUL! The heatsink will become hot when
operating the transceiver continuously for long periods.

BE CAREFUL! If a linear amplifier is connected, set
the transceiver’s RF output power to less than the lin­ear amplifier’s maximum input level, otherwise, the lin­ear amplifier will be damaged.

Use Icom microphones only (supplied or optional).
Other manufacturer’s microphones have different pin
assignments, and connection to the IC-910H may
damage the transceiver.

i

TABLE OF CONTENTS

qwe

r

1

IMPORTANT ........................................ i

EXPLICIT DEFINITIONS ..................... i

PRECAUTIONS ................................... i

1 TABLE OF CONTENTS ................ 1

2 PANEL DESCRIPTION ........... 2 –13

■ Front panel ..................................... 2

■ Function display ........................... 10

■ Rear panel .................................... 12

3 INSTALLATION AND

CONNECTIONS ................... 14 – 17

■ Unpacking .................................... 14

■ Grounding ..................................... 14

■ Selecting a location ...................... 14

■ Antenna connection ...................... 14

■ Required connections ................... 15

■ Advanced connections ................. 16

■ Power supply connections ............ 17

4 BASIC OPERATION ............. 18 – 25

■ Initial settings ................................ 18

■ When first applying power

(CPU resetting) ............................. 18

■ MAIN and SUB bands .................. 19

■ Operating band selection ............. 20

■ VFO description ............................ 21

■ Frequency setting ......................... 22

■ SUB band OFF ............................. 24

■ SUB tuning dial ............................. 24

■ Dial lock function .......................... 25

5 RECEIVE AND TRANSMIT .. 26 –39

■ Functions for receive .................... 26

■ RIT function .................................. 27

■ IF shift function ............................. 27

■ AGC time constant ....................... 28

■ AFC function ................................. 28

■ FM center indicator ....................... 28

■ Attenuator ..................................... 29

■ Simple band scope ....................... 29

■ Noise blanker ............................... 30

■ Tone squelch operation ................ 30

■ Optional DSP functions ................ 31

■ Functions for transmit ................... 32

■ Transmit via microphone .............. 32

■ Indications during transmit ........... 32

■ FM mode operation ...................... 33

■ VOX operation .............................. 33

■ Repeater operation ....................... 34

■ SSB mode operation .................... 36

■ Speech compressor ..................... 36

■ Split frequency operation .............. 37

■ Full duplex operation .................... 37

■ Connections for CW ..................... 38

■ CW mode operation ..................... 38

6 MEMORY OPERATION ........ 40 – 44

■ Memory channels ......................... 40

■ Operation on a memory channel .. 40

■ Programming in VFO mode .......... 41

■ Programming in memory mode .... 41

■ Blank channels ............................. 42

■ Frequency transferring ................. 42

■ Memory clearing ........................... 43

■ Call channels ................................ 43

■ Memo pads ................................... 44

7 SCANS ................................. 45 – 47

■ Scan types .................................... 45

■ Preparation ................................... 45

■ Programmed scan operation ........ 46

■ Memory scan operation ................ 46

■ Memory select scan ..................... 47

■ Tone scan ..................................... 47

8 SATELLITE OPERATION ..... 48–51

■ Satellite communications outline .. 48

■ Satellite notes ............................... 48

■ Entering into the satellite mode .... 48

■ Setting the satellite VFO ............... 49

■ Tracking selection ......................... 49

■ Preparation ................................... 50

■ Satellite operation ......................... 51

■ Satellite memory ........................... 51

9 DATA COMMUNICATION ..... 52 –54

■ Functions for AFSK ...................... 52

■ Connections for AFSK .................. 52

■ Operating mode notes .................. 53

■ Operating frequency notes ........... 53

■ AFSK operation ............................ 53

■ Setting the ACC socket ................ 54

10 SET MODE ........................... 55 –69

■ Set mode description .................... 55

■ General set mode ......................... 56

■ FM set mode ................................ 60

■ SSB/CW set mode ....................... 62

■ Scan set mode ............................. 64

■ Memo pad set mode ..................... 64

■ Compressor set mode .................. 64

■ VOX set mode .............................. 65

■ Attenuator set mode ..................... 65

■ Transmit set mode ........................ 66

■ NR set mode ................................ 67

■ SWP set mode ............................. 67

■ RIT/SHIFT set mode .................... 68

■ Speech set mode ......................... 69

11 OPTION INSTALLATIONS ... 70 –76

■ Internal view ................................. 70

■ Opening the transceiver’s case .... 71

■ UT-102 VOICE SYNTHESIZER

.............................................. 71

UNIT

■ UT-106 DSP UNIT .......................... 72

■ UX-910 1200 MHz BAND UNIT ........ 73

■ CR-293 HIGH STABILITY CRYSTAL

.............................................. 74

UNIT

■ FL-132/FL-133 CW NARROW

........................................... 75

FILTER

12 MAINTENANCE ................... 76 – 77

■ Troubleshooting ............................ 76

■ Fuse replacement ......................... 77

■ CPU resetting ............................... 77

13 CONTROL COMMAND ........ 78 –79

■ Remote jack (CI-V) information .... 78

14 SPECIFICATIONS ....................... 80

15 OPTIONS ..................................... 81

16 INSTALLATION NOTES ....... 82– 83

SUPPLIED ACCESSORIES

The transceiver comes with the following accessories.

Qty.

q DC power cable (OPC-657A) ............................ 1

w Hand microphone (HM-12) ................................ 1

e Spare fuses (FGB 30 A) .................................... 2

r Spare fuse (FGB 4 A) ........................................ 1

1

RF PWR

IncreasesDecreases

MIC GAIN

Recommended level for
an Icom microphone

IncreasesDecreases

2

q

o

!0

!1 !2

!3

w

e
r

t

y

u

i

PANEL DESCRIPTION

■ Front panel

q POWER SWITCH [POWER]

➥ Push momentarily to turn power ON.
➥ Push for 2 sec. to turn power OFF.

w TRANSMIT SWITCH [TRANSMIT]

Push to select transmitting or receiving.

e COMPRESSION SWITCH [COMP] (p. 36)

Push to switch the speech compressor function ON
and OFF.

• The speech compressor increases average RF output

2

power, improving signal strength and readability in SSB.

r VOX SWITCH [VOX] (p. 33)

Push to switch the VOX function ON and OFF.

• The VOX (Voice-Operated Transmission) function tog­gles between transmit and receive with your voice. This
function provides an opportunity to input log entries into
your computer, etc., while operating.

t HEADPHONE JACK [PHONES]

Accepts headphones.

• Output power: 5 mW with 8–16 Ω load.

• When headphones are connected, the internal speaker

or connected external speaker does not function.

• The MAIN and SUB band audio can be mixed or sepa­rated when using stereo headphones according to set
mode settings. (p. 57)

y MICROPHONE CONNECTOR [MIC]

Accepts the supplied or optional microphone.

•See p. 81 for appropriate microphones.

•See p. 15 for microphone connector information.

u MIC GAIN CONTROL [MIC GAIN]

Adjusts microphone input gain.

✔

How to set the microphone gain.

Set the [MIC] control so that the [MAIN]/[SUB] indicator (ALC
indicator) some times lights brighter during normal voice
transmission in SSB mode.

i RF POWER CONTROL [RF PWR]

Continuously varies the RF output power from min­imum to maximum.

144 MHz band 5–100 W
430(440) MHz band 5–75 W
1200 MHz band 1–10 W (optional UX-910)

AF RF/SQL

No audio output

Max. audio output

Decreases Increases

Squelch is
open.

S-meter
squelch

S-meter squelch
threshold

Noise squelch
threshold

Shallow Deep

Noise squelch

Minimum RF gain

Adjustable
range

Maximum
RF gain

Recommended level

RF gain
adjustable
range (SSB,
CW modes)

Maximum
RF gain

S-meter
squelch

Noise squelch (FM mode)

Squelch is
open.

MODE

SSB, CW

FM

AUTO

RF GAIN

SQL

SQL

SET MODE SETTING

SQL

SQL

RF GAIN + SQL

RF GAIN + SQL

SQL

PANEL DESCRIPTION

2

o MAIN BAND INDICATOR [MAIN]

➥ Lights green while the squelch is opened or a sig-

nal is received on the MAIN band; lights red while
transmitting on the MAIN band.

•While transmitting, the indicator also shows ALC con­dition. Brightness increases more than usual when
the ALC function is activated.

➥ Flashes when an off-frequency signal is received

and the FM center detector is activated. (p. 28)

!0 RF GAIN CONTROL/SQUELCH CONTROL

[RF/SQL] (outer control)

Adjusts the RF gain and squelch threshold level for
the MAIN band. The squelch removes noise output
from the speaker (closed condition) when no signal
is received.

•The squelch is particularly effective for FM. It is also
available for other modes.

•12 to 13 o’clock position is recommended for any setting
of the [RF/SQL] control.

•The squelch threshold position for SSB/CW mode can
be set from 12 or 13 o’clock position in SSB/CW set
mode. (p. 62)

•The control can be set as ‘Auto’ (RF gain control in SSB
and CW; squelch control in FM) or squelch control (RF
gain is fixed at maximum) in set mode as follows. (p. 56)

•When functioning as squelch control

(RF gain is fixed at maximum.)

!1 AF CONTROL [AF] (inner control)

Varies the audio output level from the speaker for
the MAIN band.

!2 SUB BAND INDICATOR [SUB]

Lights green while the squelch is opened or a signal
is received on the SUB band; lights red while trans­mitting in satellite operation.

• When setting as RF gain/squelch control

•When functioning as RF gain control

(Squelch is fixed open; SSB, CW only)

!3 RF GAIN CONTROL/SQUELCH CONTROL

[RF/SQL] (outer control)

Adjusts the RF gain and squelch threshold level for
the SUB band. The squelch removes noise output
from the speaker (closed condition) when no signal
is received.

3

2

For 1 sec.

For 1 sec.

For 1 sec.

!4

!5

!6

!7

!8

!9

@0

@1

@2

@3

PANEL DESCRIPTION

■ Front panel

(continued)

!4 AF CONTROL [AF] (inner control)

Varies the audio output level from the speaker for
the SUB band.

!5 SET•MENU SWITCH [SET•MENU] (p. 55)

➥ Push this switch then one of [FM],

[SSB/CW], [RIT], [SCAN], [NR], [TRANS­MIT], [COMP], [VOX], [ATT], [SWP],
[MPW] or [SPCH] to enter the indepen­dent item set mode.

➥ Push for 1 sec. to enter the set mode for

commonly used item settings.

!6 ATTENUATOR•PRE-AMP SWITCH [ATT•P.AMP]

➥ Push to switch the attenuator function

ON and OFF. (p. 29) Use this function to
protect from signal distortion from exces­sively strong signals.

•The attenuation level is independently ad­justable for 144 MHz or 430(440) MHz band
in the ATT set mode. The optional 1200 MHz
band attenuation level is fixed and is approx.
20 dB. (p. 65)

➥ Push for 1 sec. to switch the connected

pre-amplifier ON and OFF, when an op­tional pre-amplifier unit, AG-25, AG-35
and/or AG-1200, is connected. (p. 16)

DO NOT connect any equipment, such as an SWR
or power meter between the transceiver and pream­plifier. In such case, the preamplifier may not acti­vate properly.

!7 AUTO FREQUENCY CONTROL/NOISE

BLANKER•NOISE REDUCTION SWITCH
[AFC/NB•NR]

➥ During FM/FM narrow mode operation,

push to switch the AFC (Automatic Fre­quency Control) function ON and OFF.
(p. 28)

•Automatically tunes the operating frequency,
when an off-frequency signal is received, in
100 kHz steps. This function also follows the
signal even if the frequency is shifted.

➥ During SSB or CW mode operation, push

to switch the noise blanker function ON
and OFF. (p. 30)

•Reduces pulse-type noise, such as ignition
noise from a vehicle.

➥ Push for 1 sec. to switch the noise re-

duction function ON and OFF when an
optional DSP unit, UT-106, is installed.
(p. 31)

•Reduces unwanted noise and pulls out the
desired signal only for clear readability.

4

PANEL DESCRIPTION

For 1 sec.

or

or

Brake adjustment screw

For 1 sec.
For 1 sec.

For 1 sec.

2

!8 AUTO GAIN CONTROL•AUTO NOTCH FILTER

SWITCH [AGC•ANF]

➥ Push to switch the time constant of the

automatic gain control to SLOW and
FAST for the MAIN band.* (p. 28)

•SLOW selection (“FAGC” disappears) during
SSB (USB or LSB) operation, FAST selection
(“FAGC” appears) during CW, data operation
and while tuning with fast tuning dial rotation
are recommended.

*The AGC time constant can be selected on the

MAIN band only. FAST selection is fixed on
the SUB band.

➥ Push for 1 sec. to switch the automatic

notch filter function ON and OFF when
the optional DSP unit, UT-106, is in­stalled. (p. 31)

•Reduces interference signals such as beat,
RTTY or CW signals and the notch frequency
automatically follows the interfering signal.

!9 kHz/MHz•TUNING STEP SELECTION SWITCH

[kHz/MHz] (p. 22)

➥ Push to select tuning step for the tuning

dial or scanning from 1 kHz, 1 MHz step
and regular tuning step* in sequence

•“ZZ” appears above the 1 kHz or 1 MHz digit
when 1 kHz or 1 MHz tuning step is selected,
respectively.

*The regular tuning step is selected for each

operating mode as follows.

➥ Push for 1 sec. to enter the regular tun-

ing step selection mode.

•The tuning step can be selected for each op­erating mode independently.

•SSB/CW mode: 1, 10, 50 and 100 Hz step;
FM mode: 0.1, 5, 6.25, 10, 12.5, 20, 25 and
100 kHz step can be selected by rotating the
tuning dial.

@2 BRAKE ADJUSTMENT SCREW

Adjust the tension of the tuning dial.

•Rotate clockwise to increase the tension; counterclock­wise to decrease the tension.

@3 MEMORY CHANNEL UP/DOWN SWITCHES

[YYUP]/[DOWNZZ] (p. 40)

➥ Push [Y UP] to change the memory

channel up; push [DOWN Z] to change
the memory channel down.

•Memory channel changes continuously while
holding either switch.

•Memory channels can be selected both in
VFO and memory modes.

@0 SPEECH•LOCK SWITCH [SPCH•LOCK]

➥ Announces the receiving signal strength

and/or selected readout frequency when
the optional UT-102 is installed. (pgs. 69,

71)

➥ Push for 1 sec. to switch the tuning dial

lock function ON and OFF to prevent ac­cidental setting changes. (p. 25)

@1 TUNING DIAL

Changes the displayed frequency, selects set mode
items, etc.

5

2

For 1 sec.

For 1 sec.

For 1 sec.

RIT SHIFT

RIT SHIFT

RIT SHIFT

Center positionMax. counter-

clockwise position

Max. clockwise
position

@4

@5

@6

@8

@7

PANEL DESCRIPTION

■ Front panel

(continued)

@4 RIT CONTROL [RIT] (p. 27)

Shifts the receive frequency without changing the
transmit frequency for the MAIN band only while the
RIT function is activated.

• SSB/CW mode : ±1.0 kHz* in 10 Hz step

• FM mode : ±5.0 kHz* in 50 Hz step

*For 1200 MHz band; ±2.0 kHz and ±10.0 kHz, respec-

tively when the optional UX-910 is installed.

• By using the Sub dial function, the RIT control can be
used as the MAIN/SUB tuning dial or the SUB band IF
shift control. See page 24 for details.

@6 SATELLITE SWITCH [SATELLITE]

➥ Push to enter satellite mode (RX on

MAIN, TX on SUB band). Push again to
return to the condition before entering
into the satellite mode.

➥ Push to enter satellite mode using the

current operating frequencies when
pushing for 1 sec.

•To change the normal and reverse satellite
operations, push [F-INP/ENT] for 1 sec.

6

@5 IF SHIFT CONTROL [SHIFT]

Shifts the center frequency of the receiver’s IF
passband within 1.2 kHz range.

• By using the Sub dial function, the IF shift control can be
used as the MAIN/SUB tuning dial or the SUB band IF
shift control. See page 24 for details.

✔

What is the Sub dial function?

The [RIT] and [SHIFT] controls are used for RIT and IF shift
controls for the MAIN band by default. However, the Sub dial
function assigns these controls as the MAIN/SUB tuning dial
or the SUB band IF shift control. (p. 24, 68)

@7 RIT SWITCH [RIT] (p. 27)

➥ Push to switch the RIT control activity ON

and OFF.

•“RIT” indicator appears when the RIT func-
tion is in use.

➥ Push for 1 sec. to switch the Sub dial

function ON and OFF.

•“RIT” indicator flashes and the [RIT] and
[SHIFT] controllers acts as the controllers
specified in the RIT/SHIFT set mode. (p. 68)

@8 KEYPAD

Numeral and other function keys for tuning and ac­tivating functions.
See the table at right.

PANEL DESCRIPTION

Switch Switch action when pushed Switch action when pushed for 1 sec.

•Enters numeral “1” when entering an operating
frequency. (p. 23)

•Switches between VFO and memory mode.
(p. 40)

2

Enters numeral “2” when entering an operating
frequency. (p. 23)

•Enters numeral “3” when entering an operating
frequency. (p. 23)

•Switches between VFO A and B during VFO
mode operation. (p. 21)

Enters numeral “4” when entering an operating
frequency. (p. 23)

Enters numeral “5” when entering an operating
frequency. (p. 23)

Enters numeral “6” when entering an operating
frequency. (p. 23)

Enters numeral “7” when entering an operating
frequency. (p. 23)

•Enters numeral “8” when entering an operating
frequency. (p. 23)

•Stores the displayed operating conditions into
MEMO PAD channel (p. 44)

•Enters numeral “9” when entering an operating
frequency. (p. 23)

•Re-calls the contents in the MEMO PAD channel.
(p. 44)

Equalizes the condition of the VFO A and B.
(p. 21)

Shows 10 Hz and 1 Hz digits of operating fre­quency on both the MAIN and SUB bands while
pushing and holding. (p. 22)

Stores the set conditions into a memory channel.
(p. 41)

Clears stored contents of memory channel to be
a blank channel. (p. 43)

Transfers the contents of a memory channel into
either the VFO A or B. (p. 42)

Opens squelch for monitoring the operating or
transmit frequency, and the frequency indication
automatically changes to transmit frequency in the
case of duplex or split operation. (p. 34)

•Enters decimal point “.” for entering below the
“MHz“ digits when entering an operating fre-

quency.

• Starts and cancels scanning function. (p. 46)

•Turns OFF the SUB band frequency indication

during satellite operation. In this case, only the
MAIN band frequency can be tuned by rotating
the tuning dial. (p. 49)

•Enters numeral “0” when entering an operating
frequency. (p. 23)

•Switches sweep function for the bandscope ON
and OFF. (p. 29)

•Turns OFF the MAIN band frequency indication
during satellite operation. In this case, only the
SUB band frequency can be tuned by rotating
the tuning dial. (p. 49)

Enables operating frequency entering from the
keypad. See page 23 for details.

Starts and cancels tone scan when the repeater
tone or tone squelch is activated in FM (narrow)
operation. (p. 47)

Used to change memory channel during memory
mode operation by rotating the tuning dial while
pushing and holding. (p. 40)

7

2

For 1 sec.

For 1 sec.

For 1 sec.

For 1 sec.

#5

#4

#3

#2

#1

#0

@9

PANEL DESCRIPTION

■ Front panel

(continued)

@9 SPLIT•DUPLEX SWITCH [SPLIT•DUP]

➥ Push to turn the split function, with the

VFO A and B, ON and OFF. (p. 37)

•The split operation is not available for the
SUB band.

➥ Push for 1 sec. to select the duplex (re-

peater) direction or to turn the function
OFF. (p. 34)

•The duplex operation is not available for the
SUB band.

#2 TONE SWITCH [TONE] (p. 34)

➥ Push to turn the tone encoder function

ON and OFF in FM mode. (except Eu­rope, Sweden and Italy versions)

•“T” indicator appears in the display when the
tone encoder is activated.

➥ Push to transmit a 1750 Hz repeater tone

in FM mode for European, Sweden and
Italy versions.

Available repeater tones (Unit: Hz)

254.1

210.7

186.2

165.5

136.5

107.2

085.4

67.0

69.3

71.9

74.4

77.0

79.7

82.5

088.5

091.5

094.8

097.4

100.0

103.5

110.9

114.8

118.8

123.0

127.3

131.8

141.3

146.2

151.4

156.7

159.8

162.2

167.9

171.3

173.8

177.3

179.9

183.5

189.9

192.8

196.6

199.5

203.5

206.5

218.1

225.7

229.1

233.6

241.8

250.3

#0 SSB/CW•CW-NARROW SWITCH

[SSB/CW•CW-N]

➥ Push to switch the operating mode be-

tween SSB and CW. (p. 23)

➥ Push for 1 sec. to switch the operating

mode between USB and LSB or between
CW and CW narrow during SSB or CW
mode, respectively.

#3 MAIN/SUB CHANGE•BAND SWITCH

[M/S•BAND]

➥ Push to replace the MAIN band’s fre-

#1 FM•FM-NARROW SWITCH [FM•FM-N] (p. 23)

➥ Push to switch the operating mode be-

quency and mode with the SUB band’s.
(p. 19)

tween FM and FM repeater mode.

•The duplex operation can be made in MAIN
band only, it cannot be operated in SUB
band.

➥ Push for 1 sec. to switch the operating

mode between FM and FM-N (FM nar-

➥ Push for 1 sec. to change the operating

band during single band operation or
when the optional band unit, UX-910, is
installed. (p. 20)

row).

•The FM-N mode cannot be selected in
1200 MHz band operation.

8

#4 SUB•SUB OFF SWITCH [SUB•SUB OFF]

For 1 sec.

For 1 sec.

➥ Push to enable the SUB band control

from the tuning dial, keypad, etc. (p. 19)

•“SUB” indicator appears.

➥ Push for 1 sec. to turn the SUB band

readout indication ON and OFF. (p. 24)

#5 CALL•TONE SQUELCH SWITCH [CALL•T-SQL]

➥ Push to select the call channel of the op-

erating band. The call channel can be se­lected from both the VFO and memory
mode operation. (p. 43)

➥ Push for 1 sec. to turn the tone squelch

function ON and OFF during FM mode
operation. (p. 30)

•“T-SQL” indicator appears when the tone
squelch is activated.

PANEL DESCRIPTION

2

9

2

VFOA
VF

O

B

MEMO

R

ITCW N

L

SB

USBNFM

SUB

NOR

SAT

L

RE

V

L

OC K

T-SQ

L

S13

5

7

9 20

40

60dB

AT T P.AMP.AMP

AFCAFCNBNB

FAGC NR ANF

BLANKNK

SWP
S

CAN

OVEROVER

MEMO

F

M

N

USBUSB LSB

C

W

N

RIT

SPLITSPLIT

VFO A
VFO B

SET

BLANK

T-S Q

L

A

TT P.A MP

AFCAFC

N

B

F

AGCAGC

N

R

ANFANF

9600

COMPMP

SWP

60dB

VOX

S

CAN

OVER

S

1

3 5

7

9

20

40

DUP

q

q

w

w

e

e

r

t

y

y

u

u

i

i

o

o

!0

!0

!1
!2

!3!4

!5

!5

!6

!6

!7

!7

!8

!8

!9

!9

@0

@0

@1

@1

@2

@2

@3

@3

@5

@6

@7
@8

@4

@4

PANEL DESCRIPTION

■ Function display

10

q FREQUENCY READOUTS (p. 22)

Shows the operating frequency.

• Setting item name is indicated during set mode. (p. 55)

w MODE INDICATOR (p. 23)

Shows the selected operation mode.

e TUNING STEP INDICATOR (p. 22)

Appears when the 1 kHz or 1 MHz tuning step is se­lected.

r DUPLEX INDICATOR (p. 34)

Either “DUP–” or “DUP+” appears during duplex (re­peater) operation.

t SPLIT INDICATOR (p. 37)

Appears during split operation.

y RIT INDICATOR (p. 27)

➥ Appears while the RIT function is activated.
➥ Flashes while the SUB dial function is activated.

u VFO INDICATOR (p. 21)

Either VFO A or VFO B appears during VFO opera­tion.

i MEMORY MODE INDICATORS/MEMORY

CHANNEL NUMBER READOUTS (p. 40)

The memory mode indicator appears during mem­ory mode operation and the memory channel num­ber readout shows the selected memory channel
number during both the memory and VFO mode op­eration.

✔

In addition to the memory channel number indication, the
memory channel number readout indicates 10 Hz and 1 Hz
digits of operating frequency while rotating the tuning dial in
SSB or CW mode with 10 or 1 Hz tuning step. After 2 sec.
from tuning dial operation, the readout indicates the memory
channel number.

Memory channel number readout

o AUTO NOTCH FILTER INDICATOR (p. 31)

Appears when the optional DSP unit, UT-106, is in­stalled, and the ANF (Automatic Notch Filter) func­tion is activated.

!0 BLANK INDICATOR (p. 42)

not been programmed or has been cleared.

Appears when the selected memory channel has

PANEL DESCRIPTION

2

!1 DATA TRANSMISSION SPEED INDICATOR

(p. 52)
Appears when 9600 bps speed is selected for
packet transmission.

!2 SPEECH COMPRESSOR INDICATOR (p. 36)

Appears when the speech compressor is activated.

!3 SET INDICATOR (p. 55)

Appears when [SET] is pushed.
Disappears after any switch is pushed.

!4 VOX INDICATOR (p. 33)

Appears when the VOX function is activated.

!5 SWEEP INDICATOR (p. 29)

Flashes while the simple bandscope function is ac­tivated.

!6 SCAN INDICATOR (p. 46)

Flashes while scanning.

!7 NOISE REDUCTION INDICATOR (p. 31)

Appears when the optional DSP unit, UT-106, is in­stalled and the noise reduction is activated.

@4 TONE SQUELCH INDICATOR (pgs. 30, 34)

“T” appears when the tone encoder function is acti­vated; “T-SQL” appears when the tone squelch
function is activated.

@5 SUB INDICATOR (p. 19)

Appears when the SUB band access is enabled.

@6 SATELLITE INDICATOR (p. 49)

Appears while satellite operation mode is selected.

SATL

• - : Satellite operation with normal mode

NOR

is selected.

SATL

• - : Satellite operation with reverse mode

REV

is selected.

@7 REMOTE INDICATOR (p. 78)

Appears when the transceiver is controlled remotely
via the optional CI-V level converter, CT-17.

@8 LOCK INDICATOR (p. 25)

Appears when the dial lock function is activated.

!8 AGC TIME CONSTANT INDICATOR (p. 28)

Appears when the FAST AGC time constant is se­lected; disappears when the SLOW AGC time con­stant is selected.

!9 NOISE BLANKER INDICATOR (p. 30)

Appears when the noise blanker function is acti­vated.

@0 AUTO FREQUENCY CONTROL INDICATOR

(p. 28)
Appears when the AFC (Automatic Frequency Con­trol) function is activated.

@1 PRE-AMP INDICATOR (p. 16)

Appears when the optional pre-amplifier unit,
AG-25, AG-35 and/or AG-1200, is connected and
the pre-amplifier function is activated.

@2 ATTENUATOR INDICATOR (p. 29)

Appears when the attenuator is activated.

@3 MULTI-FUNCTION BAR METER

➥ Shows the receiving signal strength as an S-

meter while receiving. Peak hold function is avail­able and can be switched ON and OFF in regular
set mode. (pgs. 26, 56)

➥ Shows the relative transmit output power level as

an RF power indicator during transmit. (p. 32)

➥ Shows signal availability in the sweeping band,

and the “▼” indicator indicates the center of the
sweeping frequency band.

11

2

(dot)
(com)
(dash)

(+)

(_)

Rear panel
view

+_

o

!2

w

e

r

t

y

u

i

q

!0

!1

PANEL DESCRIPTION

■ Rear panel

12

q 430(440) MHz ANTENNA CONNECTOR (p. 15)

Accepts a 50 Ω antenna with a type-N connector.

w DC POWER SOCKET [DC 13.8V] (p. 17)

Accepts 13.8 V DC through the supplied DC power
cable (OPC-657A).

e 144 MHz ANTENNA CONNECTOR (p. 15)

Accept a 50 Ω antenna with a PL-259 connector.

r SUB BAND EXTERNAL SPEAKER JACK

[SP (SUB)]

t MAIN BAND EXTERNAL SPEAKER JACK

[SP (MAIN)] (p. 16)

Accepts a 4–8 Ω speaker.
By connecting an external speaker for each or both
jacks, the audio for both the MAIN and SUB bands
is output as follows.

MAIN AF SUB AF

No Int. SP Int. SP
SP (MAIN) Ext. SP Ext. SP
SP (SUB) Int. SP Ext. SP
Both Ext. SP (MAIN) Ext. SP (SUB)

y 1200 MHz ANTENNA CONNECTOR (p. 15)

Available when the optional 1200 MHz band unit is
installed. Accepts a 50 Ω antenna with a type-N
connector.

u KEY JACK [KEY] (p. 15)

Accepts a paddle, a straight key or external elec­tronic keyer with 1⁄8 inch standard plug.

i SUB BAND DATA SOCKET [DATA (SUB)]
o MAIN BAND DATA SOCKET [DATA (MAIN)]

(p. 13)
6-pin mini plug DIN jack to connect a TNC, etc. for
high speed data communications.
Simultaneous data communications are provided by
equipping independent data sockets for both MAIN
and SUB bands.

!0 ACCESSORY SOCKET [ACC(1)]

Enables connection of external equipment such as
a TNC for data communications, etc.

• See the right table for socket information.

!1 CI-V REMOTE CONTROL JACK [REMOTE]

(p. 78)
Designed for use with a personal computer via the
optional CT-17 for remote control of transceiver
functions.

!2 GROUND TERMINAL [GND] (p 14)

Connect this terminal to a ground to prevent electri­cal shocks and other problems.

PANEL DESCRIPTION

1

2

3

4

5

6

7

8

q

w

e

y

t

r

q

w

e

y

t

r

D ACC SOCKETS

ACC(1) Socket Pin No. Pin Name Description Specification

1

NC

No connection.

2

2

3

4

5

GND

SEND

MOD

AF

Connect to ground.

Input terminal to transmit the trans­ceiver in relation to the external equip­ment. (Grounded: transmits)

Input terminal for the modulation cir­cuit.

Output terminal for AF signals from
the AF detector circuit. Output level is

Transmit voltage : –0.5 to +0.8 V
Output current : Less than 20 mA
Input current (Tx) : Less than 200 mA

Output impedance : 10 kΩ
Input level : 100 mV rms

Output impedance : 4.7 kΩ
Output level : 100–300 mV rms

fixed, regardless of [AF] control.

Output terminal for squelch condition

6

SQLS

(Open/Close). Outputs grounded level

Squelch open : Less than 0.3 V/5 mA
Squelch close : More than 6.0 V/100 µA

signal when squelch is opened.

7

13.8 V

Output terminal for 13.8 V DC, in re-

Output current : Less than 1 A

lation to the [POWER].

8

ALC

Input terminal for ALC control.

Input impedance : More than 10 kΩ
Control voltage : –4 to 0 V

D DATA SOCKETS

o MAIN BAND DATA SOCKET

DATA Socket Pin No. Pin Name Description

1

2

3

4

5

6

i SUB BAND DATA SOCKET

DATA Socket Pin No. Pin Name Description

1

2

3

4

5

6

DATA IN

GND

PTTP

DATA

OUT

AF OUT

SQL

DATA IN

GND

NC

DATA

OUT

AF OUT

SQL

Input terminal for data (common for both 1200 and 9600 bps)

Ground line for the DATA IN, DATA OUT and AF OUT.

Transmits when this terminal is grounded.

Received data output terminal for 9600 bps operation.

Received data output terminal for 1200 bps operation.

Output terminal for squelch condition (Open/Close). Outputs grounded level signal
when squelch is opened, +8 V level signal when squelch is closed.

Input terminal for data (common for both 1200 and 9600 bps)

Ground line for the DATA IN, DATA OUT and AF OUT.

No connection.

Received data output terminal for 9600 bps operation.

Received data output terminal for 1200 bps operation.

Output terminal for squelch condition (Open/Close). Outputs grounded level signal
when squelch is opened, +8 V level signal when squelch is closed.

13

3

INSTALLATION AND CONNECTIONS

■ Unpacking

After unpacking, immediately report any damage to the
delivering carrier or dealer. Keep the shipping cartons.

For a description and a diagram of accessory equip­ment included with the IC-910H, see ‘Supplied acces­sories’ on p. 1 of this manual.

■ Grounding

To prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob­lems, ground the transceiver through the GROUND
terminal on the rear panel.

For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance be­tween the [GND] terminal and ground as short as pos­sible.

R WARNING: NEVER connect the [GND]

terminal to a gas or electric pipe, since the connec­tion could cause an explosion or electric shock.

■ Selecting a location

Select a location for the transceiver that allows ade­quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele­ments, radios and other electro-magnetic sources.

The base of the trans­ceiver has an ad­justable stand for desk­top use. Set the stand
to depending on your
operating conditions.

■ Antenna connection

For radio communications, the antenna is of critical im­portance, along with output power and sensitivity. Se­lect antenna(s), such as a well-matched 50 Ω antenna,
and feedline. 1.5:1 or better of Voltage Standing Wave
Ratio (VSWR) is recommended for your desired band.
Of course, the transmission line should be a coaxial
cable.

CAUTION: Protect your transceiver from lightning

by using a lightning arrestor.

PL-259 CONNECTOR INSTALLATION EXAMPLE TYPE-N CONNECTOR INSTALLATION EXAMPLE

q

Coupling ring

w

e

r

30 mm

10 mm (soft solder)

10 mm

Soft
solder

1–2 mm

solder solder

Slide the coupling ring
down. Strip the cable
jacket and soft solder.

Strip the cable as shown at
left. Soft solder the center
conductor.

Slide the connector body
on and solder it.

Screw the coupling ring
onto the connector body.

q

w

e

r

Nut Rubber gasket

Washer

Clamp

Be sure the center conductor is
the same height as the plug body.

3 mm

15 mm

Center
conductor

6 mm

Solder hole

No space

Slide the nut, rubber
gasket and clamp over the
coaxial cable, then cut the
end of the cable evenly.

Strip the cable and fold the
braid back over the clamp.

Soft solder the center
conductor. Install the
center conductor pin and
solder it.

Carefully slide the plug
body into place aligning the
center conductor pin on the
cable. Tighten the nut onto
the plug body.

14

30 mm ≈9⁄8 in 10 mm ≈3⁄8 in 1–2 mm ≈1⁄16 in

DC POWER SUPPLY (p. 17)

[430(440)MHz ANT]

(p. 14)

[1200MHz ANT] (p. 14)

[144MHz ANT] (p. 14)

[KEY] jack (p. 38)

GROUND (p. 14)

Required for optional
UX-910 operation.

+_

13.8 V DC
More than 25 A

(dot)
(com)
(dash)

+

_

SM-20 DESKTOP
MICROPHONE (optional)

MICROPHONE CONNECTOR (Front panel view)

Input impedance:

8–16 Ω

Audio output power:

5 mW with 8 Ω load
Output power may differ
according to the headphone

HM-12 HAND
MICROPHONE

HEADPHONES

q MIC (Microphone input)
w +8V (Max. 8 V DC 10 mA)
e MIC U/D (Frequency up/down)
r SQL S (Squelch switch)
t PTT
y GND (PTT ground)
u GND (Microphone ground)
i AF OUT (varies with [AF])

CAUTION: DO NOT short pin 2 to ground as this can damage the
internal 8 V regulator. DC voltage is applied to pin 1 for microphone
operation. Take care when using a non-Icom microphone.

q

w

e

r

t

y

u

i

■ Required connections

• Front panel

INSTALLATION AND CONNECTIONS

3

• Rear panel

15

3

MB-23 CARRYING HANDLE

PREAMP (p. 59)

(144 MHz/430(440) MHz/1200 MHz)

EXTERNAL SPEAKER

(MAIN/SUB) (p. 12)

CT-17

144 MHz : AG-25
430(440) MHz : AG-35
1200 MHz : AG-1200

External all-weather, mast
mounting preamplifiers are
available.

MAIN

MAIN

144 MHz430(440) MHz 1200 MHz (optional)

SUB

SUB

s

p

-

7

i

c

o

m

Use 4–8 Ω speakers.

[REMOTE] (p. 78)

Used for computer control and transceive
operation.

Used for external
equipment control.

ACC SOCKETS
(pgs. 13, 52)

DATA SOCKETS

(MAIN/SUB) (pgs. 13, 52)

CAUTION: NEVER

connect equipment
(i.e. power, SWR meter)
between transceiver
and preamplifier.

INSTALLATION AND CONNECTIONS

■ Advanced connections

• Front panel

• Rear panel

16

AC outlet

AC cable

13.8 V DC 25 A

A DC power supply

Black_Red

+

IC-910H

Supplied DC
power cable

INSTALLATION AND CONNECTIONS

24V

Ciga

IC-910H

12 V
battery

Supplied
DC power cable

+ red

_ black

Crimp

Solder

Grommet

3

■ Power supply connections

Use an optional DC power supply with a 25 A capacity
and above when operating the transceiver with AC
power. Refer to the diagrams below.

CONNECTING A DC POWER SUPPLY

CAUTION: Before connecting the DC power

cable, check the following important items. Make
sure:

• The [POWER] switch is OFF.

•Output voltage of the power source is 12–15 V

when you use a non-Icom power supply.

• DC power cable polarity is correct.

Red : positive + terminal
Black : negative _ terminal

CONNECTING A VEHICLE BATTERY

NEVER connect to

a 24 V battery.

NEVER use the cig-

arette lighter socket as
a power source.

NOTE: Use terminals for
the cable connections.

17

4

[POWER] [MW 4] [M-CL 5]

F

M

VFO A

VFVFOA

F

M

S13

579 2020

40

60dB60dB

60dB

S

1

3 5

7

9

20

40

[TRANSMIT]: OFF

[COMP]: OFF

[VOX]: OFF

[AF] (SUB band):
CCW

[RF/SQL]: (SUB band)
12 o’clock

[MIC]: CCW

[SET]: OFF

[ATT(P.AMP)]: OFF

[RF PWR]: CCW

[AFC/NB]: OFF

[AGC]: OFF

[RIT]: 12 o’clock

[SHIFT]: 12 o’clock

[RIT]: OFF

[POWER]: OFF

[AF] (MAIN band):
CCW

[RF/SQL] (MAIN band):
12 o’clock

[SATELLITE]: OFF

BASIC OPERATION

■ Initial settings

After resetting the transceiver, set controls and
switches as shown in the figure below.

Turn power ON, then check the display. If any of the
following indicators appear, turn them OFF as follows:

CCW : Max. counterclockwise

• Quick tuning step indicator “▼” : Push [kHz/MHz].

• RIT indicator “RIT” : Push [RIT].

• Split indicator “SPLIT” : Push [SPLIT].

■ When first applying power (CPU resetting)

Before first applying power, make sure all connections
required for your system are complete by referring to
Chapter 3. Then, reset the transceiver using the fol­lowing procedure.

q Make sure the transceiver power is OFF.
w While pushing [MW 4] and [M-CL 5], push

[POWER] to turn power ON.

• The internal CPU is reset.

• The transceiver displays its initial VFO frequencies when

resetting is complete.

18

Resetting CLEARS all programmed contents in
memory channels and returns programmed values
in set mode to default values.

■ MAIN and SUB bands

F

M

VFO A

VFVFOA

F

M

S13

579 2020

40

60dB60dB

60dB

S

1

3 5

7

9

20

40

MAIN band display

SUB band display

F

M

VFO A

VFVFOA

F

M

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

F

M

VFO A

VFVFOA

F

M

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

MAIN band display

SUB band display

F

M

VFO A

VFVFOA

F

M

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

F

M

VFO A

VFVFOA

F

M

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

SUB

The IC-910H has dual bands: 144 MHz and 430(440)
MHz. These bands can be assigned to the MAIN and
SUB bands for operating convenience.

Each MAIN and SUB bands have independent fea­tures.

The MAIN band is the operation for both transmit and
receive, and is displayed in the upper area of the func­tion display. The SUB band is the operation for only re­ceive, and is displayed in the lower area of the function
display.

Simultaneous receive on both the MAIN and SUB
bands is possible, however the transmission can
only be transmitted on the MAIN band— not on the
SUB band.
In the case of satellite operation mode, the SUB
band is used for the transmission band.

BASIC OPERATION

4

DD

Exchanging the MAIN and SUB bands

The function display shows both the MAIN and SUB
band frequencies and both bands can receive signals
simultaneously.

DD

Accessing the SUB band

Normally, any operations, such as tuning, operating
mode selection, memory channel selection and pro­gramming, etc., are performed on the MAIN band.
However, these operations can be performed on the
SUB band by using the SUB band access capability.

Assign 144 MHz or 430(440) MHz band, whichever
band you want to transmit or be called on, as the MAIN
band.

➥ Push [M/S] to exchange the MAIN and SUB bands.

➥ Push [SUB] to switch the SUB band access capa-

bility ON and OFF.

•“SUB” indicator appears while the SUB band access ca-
pability is activated.

•Even during SUB band access, transmission cannot be
made on the SUB band.

19

4

[SUB] [M/S•BAND]

F

M

VFO A

VFVFOA

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

Select 1200 MHz to MAIN band.

F

M

VFO A

VFVFOA

F

M

SUB

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

Select 1200 MHz to SUB band.

BASIC OPERATION

■ Operating band selection

(optional UX-910 is required)

The IC-910H can be used on the additional 1200 MHz
band with the optional UX-910. The operating band
can be selected by pushing [M/S•BAND] for 1 sec.

DD

Selecting on the MAIN band

q Push [SUB] to cancel the SUB band access, if re-

quired.

w Push [M/S•BAND] for 1 sec. to select operating

band.

NOTE: The same operating band cannot be as­signed on both MAIN and SUB bands, simultane­ously.

DD

Selecting on the SUB band

q Push [SUB] to enable the SUB band access.

•“SUB” indicator appears.

w Push [M/S•BAND] for 1 sec. to select operating

band.

20

■ VFO description

F

M

VFO A

F

M

VFO B

VFO selection

F

M

VFO A

F

M

VFO B

undisplayed VFO

Equalizes the undisplayed VFO condition
to the displayed VFO.

displayed VFO

The IC-910H has two VFOs for both bands, specially
suited for instant selection of 2 frequencies or split fre­quency operation. The VFOs are called VFO A and
VFO B. You can use the desired VFO to call up a fre­quency and operating mode for your operation.

VFO is an abbreviation of Variable Frequency Oscilla­tor, and traditionally refers to an oscillator.

DD

Selecting the VFO A/B

➥ Push [A/B 3] to switch between the VFO A and

VFO B.

DD

VFO equalization

BASIC OPERATION

4

➥ Push [A=B 2] for 1 sec. to equalize the undisplayed

VFO condition to the displayed VFO.

•3 beeps sound when the VFO equalization is completed.

CONVENIENT

Use two VFOs as a quick memory

When you find a new station, but you wish to con­tinue searching, the two VFO system can be used
for quick memory storage.

q Push [A=B 2] for 1 sec. to store the displayed fre-

quency into the undisplayed VFO.

w Continue searching for stations.
e Push [A/B 3] to retrieve the stored frequency.
r To continue searching for stations, push [A/B 3]

again.

21

4

USBUSB

VFO A

USBUSB

10 Hz/1 Hz indication

While tuning

[kHz/MHz•TS] for 1 sec.

F

M

USBUSB

(20 kHz tuning step)

(10 Hz tuning step)

FM mode tuning step set mode

SSB/CW mode tuning step set mode

[kHz/MHz•TS]

F

M

VFO A

1 kHz tuning step1 MHz tuning step

BASIC OPERATION

■ Frequency setting

The IC-910H has several tuning steps and a
[kHz/MHz] switch for convenient frequency tuning.

q Push [M/S] to select the desired frequency band as

the MAIN band; or push [SUB] to access the SUB
band.

w Rotate the tuning dial to select the frequency.

• The memory channel number changes to the 10 and
1 Hz digits when rotating the tuning dial with 1, 10,
100 Hz and 6.25 kHz tuning steps.

• When you want to check the 10 and 1 Hz digits during
memory channel number indication, push and hold [A/B]
(10 and 1 Hz digits are indicated while holding).

DD

Tuning step selection

Tuning steps can be pre-set independently for FM and
SSB/CW. The following steps are selectable.

• FM : 0.1, 5, 6.25, 10, 12.5, 20, 25 or 100 kHz

• SSB/CW : 1, 10, 50 or 100 Hz

q Push [M/S] to select the desired frequency band as

the MAIN band; or push [SUB] to access the SUB
band.

w Push [FM] or [SSB/CW] to select the desired oper-

ation mode.

e Push [kHz/MHz•TS] for 1 sec. to enter the tuning

step set mode.

r Rotate the tuning dial to select the desired tuning

step.

t Push [kHz/MHz•TS] to return to previous display.

DD

Quick tuning step

The operating frequency can be changed in 1 kHz
steps or 1 MHz steps for quick tuning.

➥ Push [kHz/MHz•TS] to switch the quick tuning step

in sequence 1 kHz, 1 MHz and OFF.

22

DD

keypad

[FM] [SSB/CW]

Frequency setting with the keypad

The operating frequency can be directly entered from
the keypad.

q Push [F-INP ENT] to access the keypad frequency

entry.

• All digits of frequency indication disappear.

w Push numeral keys to enter the desired operating

frequency.

• The entered number is indicated from the 100 Hz digit.

e Push [F-INP ENT] to set the frequency.

BASIC OPERATION

[EXAMPLE]

145.3400 MHz
[F-INP ENT] [1] [4] [5] [.] [3] [4] [F-INP]

435.0000 MHz
[F-INP ENT] [4] [3] [5] [.] [F-INP ENT]

439.1200 MHz
[F-INP ENT] [4] [3] [9] [.] [1] [2] [F-INP ENT]

439.1200 MHz to 439.2604 MHz
[F-INP ENT] [.] [2] [6] [0] [4] [F-INP ENT]

Pushing numeral keys to 100 Hz digit without push­ing [.] also sets the desired operating frequency.

4

DD

Operating mode selection

SSB (USB/LSB), CW, CW-N (CW narrow), FM and
FM-N (FM narrow) modes are available in the
IC-910H. Select the desired operation mode as fol­lows.

• Selecting SSB mode

➥ Push [SSB/CW] to select USB mode.

•USB mode is generally used for SSB phone operation
on the VHF and UHF bands.

•Push [SSB/CW] for 1 sec. after USB mode selection to
switch between USB and LSB mode.

• Selecting CW mode

➥ Push [SSB/CW] to select CW mode.

•Push [SSB/CW] for 1 sec. after CW mode selection to
switch between CW and CW narrow mode.

The optional CW narrow filter, FL-132 or FL-133, is
required for the MAIN or SUB bands, respectively.
In satellite operation, the optional FL-133 is neces­sary to operate CW narrow mode in the MAIN (re­ceive) band. No audio is output until the optional
CW narrow filter is installed in the CW narrow mode.

•When the optional UT-102 voice synthesizer unit
is installed.

The UT-102 announces the selected mode in an elec­tronically-generated voice when [SSB/CW] or [FM] is
pushed. (pgs. 69, 71)

• Selecting FM mode

➥ Push [FM] to select FM mode.

•Push [FM] after FM mode selection to turn the repeater
mode (duplex negative with repeater tone ON) ON and
OFF.

•Push [FM] for 1 sec. after FM mode selection to switch
between FM and FM narrow mode.

23

4

F

M

VFO A

60dB

S

1

3 5

7

9

20

40

SUB band indication OFF.

[SUB•SUB OFF] for 1 sec.

F

M

RITRIT

VFOA

VFOAVFOA

F

M

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

While [RIT] is flashing, SUB band can be
controlled with sub dial function.

Advances the
frequency and
increases the
speed.

Reverses the
frequency and
increases the
speed.

SUB dial
functions
slightly.

BASIC OPERATION

■ SUB band OFF

The SUB band indication can be deactivated to sim­plify operation.

➥ Push [SUB•SUB OFF] for 1 sec. to turn the SUB

band indication ON and OFF.

• Push [M/S•BAND] for 1 sec. to change the operating
band. (p. 20)

■ SUB tuning dial

The IC-910H has a large main tuning dial for frequency
setting. In addition, the [RIT] or [SHIFT] controls can
be used as a SUB tuning dial for dual band simultane­ous tuning, etc. The SUB tuning dial changes the op­erating frequency continuously at a variable speed.

To use the SUB tuning dial function, assign the func­tion to either the [RIT] or [SHIFT] control using the
RIT/SHIFT set mode.

DD

When the [RIT] control is assigned as
SUB tuning dial

q Push [RIT] for 1 sec.

•“RIT” indicator flashes when the SUB tuning dial func-
tion is activated.

w Rotate [RIT] control for the desired tuning direction

and speed.

• Tuning speed can be adjusted in ±5 steps.

e Set [RIT] control to the center position to stops tun-

ing.

• A beep tone sounds when [RIT] control is set to the cen­ter.

r Push [RIT] to cancel the SUB tuning dial function.

The assigned control can be used for its original

function, however, both functions cannot be used si­multaneously.

24

DD

[SET] [DN ▼][▲ UP]

[RIT]

[RIT]

[SHIFT]

The [RIT] control functions as [RIT]
even when the SUB tuning dial
function is in use. (default)

The [RIT] control can be used for
MAIN band tuning.

The [RIT] control can be used for
SUB band tuning.

The [RIT] control can be used for
SUB band IF shift control.

The [SHIFT] control functions as
[SHIFT] even when the SUB tuning
dial function is in use. (default)

The [SHIFT] control can be used for
SUB band IF shift control.

The [SHIFT] control can be used for
MAIN band tuning.

The [SHIFT] control can be used for
SUB band tuning.

F

M

VFO A

VFVFOA

F

M

L

OC K

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

LOCK indicatior

[SPCH•LOCK] for 1 sec.

SUB tuning dial assignment

q Push [SET] then [RIT] to enter the RIT/SHIFT set

mode.

w Push [DN ▼] or [▲ UP] to select [RIT] or [SHIFT]

control to be assigned.

•“rit nob” or “SFt nob” appears.

e Rotate the tuning dial to select the condition as de-

scribed below.

•Pushing [M-CL 5] for 1 sec. selects the default setting.

r Push [SET] to exit from the RIT/SHIFT set mode.

BASIC OPERATION

4

■ Dial lock function

The dial lock function prevents accidental changes
caused by the tuning dial (including the SUB tuning dial
function).

➥ Push [SPCH•LOCK] for 1 sec. to turn the dial lock

function ON and OFF.

•“LOCK” indicator appears while the dial lock function is
activated.

25

[RF/SQL] (SUB)

[RF/SQL] (MAIN)

5

[AF] (SUB)

[AF] (MAIN)

RECEIVE AND TRANSMIT

■ Functions for receive

DD

Volume setting

➥ Rotate [AF] control for the specified operating band

(MAIN or SUB) to output a suitable audio level.

DD

Squelch setting

The squelch removes noise output from the speaker
(closed position) when no signal is received. The
squelch is particularly effective for FM. It is also avail­able for other modes.

With the default setting, noise squelch and S-meter
squelch in FM, RF gain and S-meter squelch in
SSB/CW mode operation are assigned to [RF/SQL]
control. The assignment can be changed in the gen­eral set mode. (p. 56)

• When operating in FM

q Rotate [RF/SQL] fully counterclockwise.
w Rotate [RF/SQL] clockwise to the position where

the noise just disappears.

• MAIN/SUB band indicator also goes OFF.

By rotating [RF/SQL] to a deeper position (clockwise),
the S-meter will move and the S-meter squelch func­tion will be activated. When the S-meter squelch is ac­tivated, weak signals, weaker than the S-meter
squelch set level, are ignored.

• When operating in SSB/CW

q Rotate [RF/SQL] fully counterclockwise.
w Rotate [RF/SQL] clockwise to the position where

the maximum RF gain (S-meter bar disappears),
MAIN/SUB band indicator goes OFF, and floor
noise disappears.

•With the default setting, the squelch opens at 12 o’clock
position, however, the squelch threshold level can be set
to 13 o’clock (1 o’clock) position in the SSB/CW set
mode. (p. 62)

•When rotating [RF/SQL] counterclockwise, RF gain de­creases (lower sensitivity) and the S-meter bar appears
to indicate the receivable RF signal level.

26

■ RIT function

F

M

RITRIT

FM mode

RITRIT

USBUSB

RIT variable range is displayed for 2 sec.
and then returns to frequency indication.

RIT variable range is displayed for 2 sec.
and then returns to frequency indication.

SSB mode

[RIT] control

[RIT] switch

Center positionMax. counter-

clockwise position

Max. clockwise
position

RECEIVE AND TRANSMIT

5

The RIT (Receive Incremental Tuning) function com­pensates for off-frequencies of the communicating sta­tion without moving the transmit frequency.

The RIT function can be used for the MAIN band only.
The function affects the MAIN band even when ac­cessing the SUB band.

q Push [RIT] to turn the RIT function ON.

•“RIT” indicator appears.

w Rotate [RIT] control to cancel the off-frequencies.

•Rotate [RIT] control to the center position, after commu­nication.

e Push [RIT] to cancel the RIT function.

•“RIT” indicator disappears.

DD

RIT variable range

SSB/CW mode : ±1.0 kHz in 10 Hz steps (±2.0 kHz for

optional 1200 MHz band)

FM mode : ±5.0 kHz in 50 Hz steps (±10.0 kHz

for optional 1200 MHz band)

■ IF shift function

The IF shift function electronically changes the pass­band frequency of the IF (Intermediate Frequency) and
cuts out higher or lower frequency components of the
IF to reject interference. The function shifts the IF fre­quency up to ±1.2 kHz in 100 Hz steps in SSB/CW
mode. The IF shift is especially useful in SSB opera­tion and not available in FM mode.

The IF shift function can be used for the SUB band
using the SUB tuning dial function (p. 24)

DD

MAIN band IF shift operation

q Set the [SHIFT] control to its center position when

there is no interference.

w Rotate the [SHIFT] control to adjust for minimum in-

terference signal level.

• The audio tone may change while the IF shift is in use.

DD

SUB band IF shift operation

q Assign the SUB band IF shift function to either [RIT]

or [SHIFT] control using the RIT/SHIFT set mode
(p. 68).

w Push [RIT] for 1 sec. to turn the SUB tuning dial

function ON.

•“RIT” indicator flashes.

e Rotate [RIT] or [SHIFT] control for a minimum inter-

ference signal level.

r Push [RIT] to cancel the SUB tuning dial function.

•“RIT” indicator disappears.

•Set [RIT] or [SHIFT] control to the center position after

the communication.

In satellite operation mode, the SUB tuning dial
function cannot be activated. Therefore, the [SHIFT]
control acts as an IF shift for the receive band (dis­played in the upper area).

27

5

[AGC]

C

W

VFO A

F

AGCAGC

[AFC/NB]

F

M

VFO A

AFC

Flashes in 300 msec. intervals.

RECEIVE AND TRANSMIT

■ AGC time constant

The AGC (Automatic Gain Control) controls receiver
gain to produce a constant output level even when the
received signal strength is varied by fading, etc. Use
AGC slow for normal phone operation; AGC fast for re­ceiving data and searching for signals.

➥ Push [AGC] to switch the time constant between

fast and slow.

•“FAGC” indicator appears when AGC fast is selected.

• The AGC time constant is fixed in FM mode regardless

of the FAGC indicator.

The SUB band’s AGC is automatically selected as
slow in SSB and fast in CW. AGC time constant cannot
be changed in FM mode.

■ AFC function

The AFC (Automatic Frequency Control) automatically
tunes the operating frequency when receiving an off­frequency signal or receiving signal shifts in FM or FM
narrow mode.

➥ Push [AFC/NB] to turn the AFC function ON and

OFF.

•“AFC” indicator appears when the AFC function is acti-
vated.

When strong nearby signals are available, the AFC
function may tune to those signals.

■ FM center indicator

The MAIN/SUB band indicators indicate the received
signal deviation in FM mode. When an off-center sig­nal is received, the indicator flashes.

When an off-center signal is received, rotate the tun­ing dial or use the RIT function to illuminate the indica­tor continuously.

The FM center indicator can be turned OFF using the
FM set mode. (p. 61)

28

■ Attenuator

[ATT]

C

W

VFO A

A

TT

[SWP 0]

F

M

VFOA

SWP

Indicates detected signals Sweep center

Shows ±10 channels around the displayed
frequency.

The attenuator prevents desired signals from distort­ing when very strong signals are near the desired fre­quency, or when very strong electric fields, such as
from broadcasting stations are near from your location.

The attenuator can be set to both or either band sepa­rately, and the attenuation level can be set for each
band independently.

➥ Push [ATT] to turn the attenuator ON and OFF.

•“AT T” indicator appears when the attenuator is activated.

DD

Setting the attenuation level

q Push [M/S•BAND] or [SUB] to select the desired

band of the attenuation level to be set.

w Push [SET] then [ATT] to enter the attenuator set

mode.

e Rotate the tuning dial to select attenuation level.

• Push [M-CL 5] to return to the default value.

r Push [SET] to exit the attenuator set mode.

NOTE: When using the noise blanker, received
audio may be distorted if they are excessively
strong.

RECEIVE AND TRANSMIT

Attenuation levels

144 MHz/ 0–100% variable
430(440) MHz bands Approx. 15 dB attenuation

at 100% setting

1200 MHz band Approx. 20 dB fixed

(optional)

5

■ Simple band scope

This function allows you to visually “sweep” an area
surrounding the set frequency for other signals. De­tected signals are indicated graphically on the S-meter.

q Set the operating frequency and mode.
w Push [SWP 0] to turn the simple band scope func-

tion ON and OFF.

•“SWP” indicator flashes when the simple band scope
function is activated.

•Detected signals are indicated using the S-meter and
“▼” indicator, displayed above the S-meter, shows the

center frequency (displayed frequency).

•The signal availability is detected by the noise squelch
condition (open or close).

e To monitor the detected signal, rotate the tuning dial

to set the appearing “dot” of the S-meter to below
the “▼” indicator.

•The frequency readout shows the detected signal fre­quency.

DD

Setting sweeping time interval

q Push [SET] then [SWP 0] to enter the sweep set

mode.

w Rotate the tuning dial to select sweeping time inter-

val.

• Push [M-CL 5] to return to the default value.

e Push [SWP 0] to exit the sweep set mode.

29

5

F

M

VFO A

T-S Q

L

[SET] Tuning dial

[FM][CALL•T-SQL]

[DN √]/[∫ UP]

RECEIVE AND TRANSMIT

■ Noise blanker

When operating in SSB or CW mode, pulse-type noise
may be received such as from car ignitions. In this
case, the noise blanker eliminates such noise.

The noise blanker is effective on both the MAIN and
SUB bands but cannot be used for FM, or non-pulse­type noise.

[AFC/NB]

➥ Push [AFC/NB] to turn the noise blanker function

ON and OFF.

•“NB” indicator appears when the noise blanker is acti-
vated.

• The noise blanker turns ON or OFF for both bands si­multaneously.

When using the noise blanker, received audio may
be distorted if the signals are excessively strong.

■ Tone squelch operation

The tone squelch opens only when receiving a signal
with the same pre-programmed subaudible tone. You
can silently wait for a call from group members using
the same tone. You can check the tone frequency
using the tone scan function if desired. (p. 47)

q Select the desired band by pushing [M/S•BAND].
w Push [FM] to select FM mode, then set the desired

frequency.

e Push [CALL•T-SQL] for 1 sec. to activate the tone

squelch.

•“T-SQL” indicator appears.

r When the signal with correct tone is received, the

squelch opens and audio can be heard.

• When a signal with incorrect tone or no tone is received,
the squelch does not open, however, the S-meter indi­cates the signal strength.

• Push and hold [CHECK 7] to open the squelch manually
and keep pushing to monitor.

t Operate the transceiver in a normal way (push

[PTT] to transmit; release [PTT] to receive).

y Push [CALL•T-SQL] for 1 sec. to cancel the tone

squelch.

•“T-SQL” indicator disappears.

C

W

N

B

DD

Setting the tone squelch frequency

VFO A

The tone squelch frequencies can be independently
set for each band.

q Push [M/S•BAND] to select the band for the tone

squelch frequency to be set.

w Push [SET] then [FM] to enter the FM set mode.
e Push [DN ▼] or [▲ UP] to select tone squelch fre-

quency item.

r Rotate the tuning dial to select the desired tone

squelch frequency.

t Push [FM] to exit from the FM set mode.

Tone frequency list unit: Hz

254.1

210.7

186.2

165.5

136.5

107.2

085.4

67.0

218.1

189.9

167.9

141.3

110.9

088.5

69.3

225.7

192.8

171.3

146.2

114.8

091.5

71.9

229.1

196.6

173.8

151.4

118.8

094.8

74.4

233.6

199.5

177.3

156.7

123.0

097.4

77.0

241.8

203.5

179.9

159.8

127.3

100.0

79.7

250.3

206.5

183.5

162.2

131.8

103.5

82.5

30

RECEIVE AND TRANSMIT

USBUSB

VFO A

N

R

[AFC/NB•NR] for 1 sec.

USBUSB

VFO A

ANFANF

[AGC•ANF] for 1 sec.

Unwanted tone
frequency

Desired
signal (AF)

Desired
signal (AF)

Particular frequency
is attenuated

Auto notch OFF Auto notch ON

5

■ Optional DSP functions

To activate the following functions, the optional DSP
unit, UT-106, must be installed for both or either the
MAIN and/or SUB bands.

DD

NR (Noise Reduction) function

This function reduces noise components and picks out
desired signals which are buried in noise. The received
audio signals are converted to digital signals and then
the desired signals are separated from the noise. The
noise reduction function is available for all operating
modes.

q Push [M/S•BAND] or [SUB] to select the band you

wish to activate, if required.

w Push [AFC/NB•NR] for 1 sec. to turn the noise re-

duction function ON and OFF.

•“NR” indicator appears while the automatic notch filter is
activated.

optional UT-106

DD

Setting the noise reduction level

q Push [SET] then [AFC/NB•NR] to enter the noise

reduction set mode.

w Rotate the tuning dial to select the desired noise re-

duction level.

• Push [M-CL 5] for 1 sec. to return to the default value.

e Push [AFC/NB•NR] to exit from the noise reduction

set mode.

DD

ANF (Automatic Notch Filter) function

This function automatically attenuates beat tones, tun­ing signals, etc., even if they are moving. The auto­matic notch filter functions in SSB/FM modes.

q Push [M/S•BAND] or [SUB] to select the band you

wish to activate, if required.

w Push [AGC•ANF] for 1 sec. to turn the automatic

notch filter function ON and OFF.

•“ANF” indicator appears while the automatic notch filter
is activated.

31

5

[RF PWR]

[PTT] switch

HM-12

S-meter while receiving
RF power indicator while transmitting

F

M

VFO A

VFVFOA

F

M

S 1 357

9 2020

4040

60dB60dB

60dB

OVER

S

1

3 5

7

9

20

40

OVEROVER

RECEIVE AND TRANSMIT

■ Functions for transmit

DD

Output power

The transmit output power can be continuously ad­justed with [RF PWR].

Available power

144 MHz band : 5–100 W
430(440) MHz band : 5–75 W
1200 MHz band : 1–10 W (optional)

■ Transmission via
microphone

When transmitting with a microphone, push [PTT] and
speak into the microphone at a normal voice level.

To maximize the readability of your transmitted sig­nal (voice), pause a few sec. after pushing [PTT]. Do
not hold the microphone too close to your mouth.

DD

Microphone gain

Rotate [MIC GAIN] clockwise to increase, counter­clockwise to decrease the microphone gain.

NOTE: To prevent interference, listen on the fre­quency to make sure the frequency is clear before
transmitting by pushing [CHECK 7].

32

9–12 o’clock position is recommended for [MIC GAIN].

■ Indications during transmit

DD

Transmit indicator

The MAIN band indicator lights red while transmitting.
However, the SUB band indicator lights red during
satellite operation.

DD

RF power indicator

The S-meter for the MAIN band is used as the RF
power indicator to indicate the relative output power
level. However, the S-meter for the SUB band is used
as the RF power indicator during satellite operation.

DD

Time-out timer

The time-out timer limits the continuously transmittable
time period, and is selectable from 3, 5, 10, 20, 30 min.
and OFF in TRANSMIT set mode. (p. 66)

DD

PTT lock function

Deactivate [PTT] and [TRANSMIT] switches. The func­tion can be switched ON and OFF in TRANSMIT set
mode. (p. 66)

■ FM mode operation

Tuning dial

[FM][M/S•BAND][TRANSMIT]

[MIC GAIN]

RECEIVE AND TRANSMIT

5

q Push [M/S•BAND] to select the desired band.
w Push [FM] to select FM mode.

•“FM” indicator appears.

•Push [FM] again to select repeater operation after FM
mode selection. “DUP–” and “T” indicators appear.

•Push [FM] for 1 sec. to select FM narrow mode after FM
mode selection. “FMN” indicator appears.

e Rotate the tuning dial to set the desired frequency.
r Push [PTT] to transmit.

• The MAIN band indicator lights red.

■ VOX operation (for SSB and FM)

The VOX (Voice-operated Transmission) function
switches between transmit and receive with your voice.
This function provides an opportunity to input log en­tries into your computer, etc., while operating.

q Push [M/S•BAND] to select the desired band.
w Push either [SSB/CW] or [FM] to select phone

mode (USB, LSB or FM).

e Push [VOX] to switch the VOX function ON and

OFF.

•“VOX” indicator appears while the VOX function is acti-
vated.

t Speak into the microphone at a normal voice level.

•Setting the [MIC GAIN] control to 10–12 o’clock is rec­ommended.

y Release [PTT] to receive.

DD

Adjusting the anti-VOX gain

q Push [SET] then [VOX] to enter the VOX set mode.
w Push [DN ▼] or [▲ UP] to select anti-VOX gain

item.

•“Anti” is displayed.

e Rotate the tuning dial to adjust the anti-VOX gain

while receiving a signal with a suitable audio output
level, to the point where the transceiver does not
transmit with the audio output from the speaker.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [VOX] to exit VOX set mode.

DD

Adjusting the VOX gain

q Push [SET] then [VOX] to enter the VOX set mode.
w Push [DN ▼] or [▼ UP] to select the VOX gain item.

•“GAIn” is displayed.

e Rotate the tuning dial to adjust the VOX gain while

speaking into the microphone at a normal voice
level, until the transceiver begins transmitting.

•With too sensitive a setting, the transceiver may trans­mit with other than your voice, such as noise, receiving
signal, etc.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [VOX] to exit VOX set mode.

DD

Adjusting the VOX delay

q Push [SET] then [VOX] to enter the VOX set mode.
w Push [DN ▼] or [▲ UP] to select the VOX delay

item.

•“dELAy” is displayed.

e Rotate the tuning dial to adjust the VOX delay time

while speaking into the microphone at a normal
speed, to a convenient interval before returning to
receive.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [VOX] to exit VOX set mode.

33

5

FREQUENCY RANGE SHIFT DIRECTION

1439.0000–1440.0000 MHz “DUP–” appears

1290.0000–1293.0000 MHz “DUP–” appears

FREQUENCY RANGE SHIFT DIRECTION

1145.2000–1145.4999 MHz

1146.6100–1146.9999 MHz

“DUP–” appears

1147.0000–1147.3999 MHz “DUP+” appears

1442.0000–1444.9999 MHz “DUP+” appears

1447.0000–1449.9999 MHz “DUP–” appears

1282.0000–1295.9999 MHz “DUP–” appears

RECEIVE AND TRANSMIT

■ Repeater operation

A repeater amplifies received signals and re-transmits
them at a different frequency. When using a repeater,
the transmit frequency is shifted from the receive fre­quency by an offset frequency.

DD

Setting the auto repeater range

(U.S.A. and Korea versions only)

The auto repeater function automatically turns ON the
duplex operation with specified shift direction and tone
encoder when the operating frequency is set in the de­sired frequency range. To activate the auto repeater
function, the following operations are necessary.

q Set one edge frequency of the desired frequency

range.

• Push [M/S•BAND] to select the desired band if required.

• Push [FM] to select FM mode if required.

w Set the desired repeater conditions.

• Both one-touch repeater and manual repeater setting
are acceptable.

e Push [DN ▼] or [▲ UP] to select the memory chan-

nel 1.

• The memory channel 3 or 5 is also acceptable.

r Push [MW 4] for 1 sec. to program the contents into

the memory.

• 3 beep tones may sound.

t Set the other side edge frequency of the desired

frequency range.

y Push [▲ UP] to select the memory channel 2.

• Select memory channel 4 or 6, respectively if the mem­ory channel 3 or 5 is selected in step e.

u Push [MW 4] for 1 sec. to program the contents into

the memory.

i Repeat steps q to u to program other ranges.
o Push [POWER] for 1 sec. to turn the power OFF

once, then push [POWER] to turn the power ON
while pushing and holding [FM] and [TONE].

• The memory channels can be used for normal operation
after programming.

!0 Push [SET] then [FM] to enter the FM set mode.
!1 Push [DN ▼] or [▲ UP] to select auto repeater item.

•“AutorPt” is displayed.

!2 Rotate the tuning dial to turn the auto repeater func-

tion ON.

U.S.A. version:

•“on1” Activates duplex only.

•“on2” Activates duplex and tone.

•“oFF” Auto repeater function is turned OFF.

Korea version:

•“ON” Activates duplex and tone.

•“OFF” Auto repeater function is turned OFF.

!3 Push [FM] to exit from the FM set mode.

NOTE: All repeater ranges for available bands must
be programmed at the same time. Otherwise, the
previously programmed ranges will be lost.

DD

Frequency range and shift direction

• U.S.A. version

• Korea version

DD

Setting the shift direction for the one-touch repeater function

(except Europe, Sweden and Italy versions)

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [SET] then [FM] to enter the FM set mode.
e Push [DN ▼] or [▲ UP] to select shift direction item.

•“o_touch” and “rPt” are displayed.

r Rotate the tuning dial to select the desired direction.

•“DUP–” or “DUP+” is selectable.

t Push [FM] to exit from the FM set mode.

34

F

M

VFO A

F

M

DUP

VFO A

T

60dB

S

1

3 5

7

9

20

40

Shifts 5 MHz when transmitted.

F

M

DUP

VFO A

T

F

M

VFO A

DD

Manual repeater setting

q Set the desired frequency.

•Push [M/S•BAND] to select the desired band if required.

• Push [FM] to select FM mode if required.

w Push [SPLIT•DUP] for 1 sec. to select the duplex

operation and the shift direction.

•“DUP–” or “DUP+” indicator appears, depending on the
selection.

• Set the offset frequency in the FM set mode, if required.

DD

Using the one-touch repeater function

(except Europe, Sweden and Italy versions)

By using the pre-programmed offset frequency, shift di­rection and tone frequency, quick and simple repeater
operation can be made.

The default values for offset frequency and direction
are as follows:
144 MHz band : –0.600 MHz
430(440) MHz band : –5.000 MHz
1200 MHz band : –20.000 MHz (optional)
Tone frequency : 88.5 Hz

RECEIVE AND TRANSMIT

5

e Push [TONE] to activate the tone encoder.

•“T” indicator appears.

•Set the tone frequency in the FM set mode, if required

for non-European versions..

•1750 Hz tone is transmitted for Europe, Sweden and
Italy versions.

r Push [SPLIT•DUP] for 1 sec. and [TONE] to cancel

the duplex operation and deactivate the tone en­coder.

•“DUP–” or “DUP+” and “T” indicators disappear.

r Push [FM] to select the repeater operation mode.

•“DUP–” and “T” indicators appear.

t Push [PTT] to access the repeater.

q Push [M/S•BAND] to select the desired frequency

band.

w Push [FM] to select FM mode.
e Rotate the tuning dial to input the desired repeater

frequency.

•Direct frequency input using the keypad can be used for
frequency setting.

DD

Setting tone frequency

(except Europe, Sweden and Italy versions)

q Push [M/S•BAND] to select the desired frequency

band.

w Push [SET] then [FM] to enter the FM set mode.
e Push [DN ▼] or [▲ UP] to select the tone frequency

item.

•“ton,” selected band (144/430(440)/1200) and “T” indi-
cator appear.

r Rotate the tuning dial to set the desired tone fre-

quency.

t Push [FM] to exit from the FM set mode.

y Release [PTT] to receive a signal from the repeater.
u Push [FM] to cancel the duplex operation mode.

•“DUP–” and “T” indicators disappear.

DD

Setting offset frequency

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [SET] then [FM] to enter the FM set mode.
e Push [DN▼] or [▲UP] to select the offset frequency

item.

•“duP” and selected band (144/430(440)/1200) appear.

r Rotate the tuning dial to set the desired tone fre-

quency.

t Push [FM] to exit from the FM set mode.

35

5

Tuning dial

[SSB/CW][M/S•BAND][TRANSMIT]

[MIC GAIN]

[MIC GAIN]

[COMP]

MAIN band LED
lights in red while transmitting.

RECEIVE AND TRANSMIT

■ SSB mode operation

q Push [M/S•BAND] to select the desired frequency

band.

w Push [SSB/CW] to select USB or LSB mode.

•Push [SSB/CW] for 1 sec. to switch between USB and
LSB when either the USB or LSB has been selected.

e Rotate the tuning dial to set the desired frequency.
r Push [PTT] to transmit and speak into the micro-

phone at a normal voice level.

t Rotate [MIC GAIN] so that the MAIN band indicator

periodically lights red brightly.

• The brightness increases when the ALC is activated.

y Release [PTT] to receive.

ALC indicator

While transmitting, the MAIN/SUB band indicator
shows the ALC condition. Brightness increases
more than usual when the ALC function is activated.

■ Speech compressor

The speech compressor increases average RF output
power, improving signal strength and readability in
SSB. The IC-910H has a built-in, low-distortion speech
compressor circuit.

➥ Push [COMP] to turn the speech compressor ON

and OFF.

• Either USB or LSB should be selected.

•“COMP” indicator appears when the speech compres-

sor is activated.

VOX function

The VOX (Voice-operated Transmission) function is
available for switching between transmit and receive
with your voice. See p. 33 for details.

DD

Compression level setting

q Select USB or LSB mode.
w Preset the transceiver as follows:

[COMP] function : OFF
[RF POWER] control : Max. counterclockwise

e Transmit at your normal voice level.
r Adjust the [MIC GAIN] control so that the MAIN

band indicator periodically lights red brightly
whether or not you speak softly or loudly.

t Push [COMP] to turn the speech compressor ON.
y Push [SET] then [COMP] to enter the COMP set

mode.

u Rotate the tuning dial to adjust the compression

level to the point where the maximum value and the
MAIN band indicator brightness does not increase,
whether or not you speak softly or loudly.

•When the MAIN band indicator continuously lights red
with increased brightness, your transmitted voice may
be distorted.

•It’s a good idea to adjust the compressor level by moni­toring with an other transceiver or receiver, if you have
one, or with an other station.

i Push [COMP] to exit the COMP set mode.

36

■ Split frequency operation

[A=B 2]

[A/B 3]

[SPLIT]

[TRANSMIT]

USBUSB

SPLITSPLIT

VFO B

USBUSB

VFO B

USBUSB

VFO A

RECEIVE AND TRANSMIT

5

Split frequency operation allows you to transmit and
receive on two different frequencies in the same fre­quency band. Split frequency operation uses 2 fre­quencies, one in VFO A and the other in VFO B.

q Set a receive frequency in VFO mode.

• Either VFO A or VFO B can be used.

w Push [A=B 2] for 1 sec.

•The undisplayed VFO contents are cleared and equal­ized to the displayed frequency.

e To change the receive frequency, rotate the tuning

dial.

r To replace the transmit and receive frequencies,

push [A/B 3].

t To change the transmit frequency, rotate the tuning

dial while pushing [CHECK 7].

y Push [SPLIT].

•“SPLIT” indicator appears.

•Now you can receive on the displayed VFO and transmit

on the undisplayed VFO.

• To monitor the transmit frequency, push [CHECK 7].

u Push [SPLIT] to cancel the split frequency opera-

tion.

•“SPLIT” indicator disappears.

Cross mode communication can be performed using
the split function. (e.g. USB and CW)

■ Full duplex operation

The MAIN and SUB bands are activated indepen­dently, therefore, simultaneous transmission and re­ception in different frequency bands are possible.

q Push [M/S•BAND] to select the desired frequency

band for transmission.

•Push [V/M 1] to select VFO or memory mode, if desired.

•Push [SSB/CW] or [FM] to select the desired operating

mode.

w Rotate the tuning dial to set the desired frequency.

•Direct frequency input from the keypad is also available.

e Push [SUB] to enable the SUB band access.

•Push [M/S•BAND] for 1 sec. to select the desired fre­quency band, if desired. (when the optional UX-910 is
installed.)

•Push [V/M 1] to select VFO or memory mode, if desired.

•Push [SSB/CW] or [FM] to select the desired operating

mode.

r Push [PTT] to transmit.

• SUB band mute function

The SUB band mute function mutes receiving audio
from the SUB band while transmitting.

q Push [SET] then [TRANSMIT] to enter the TRANS-

MIT set mode.

w Push [DN ▼] or [▲ UP] to select the SUB band

mute item.

•“Audio” is displayed.

e Rotate the tuning dial to turn the SUB band mute

function ON and OFF.

•Push [M-CL 5] for 1 sec. to return to the default setting.

r Push [TRANSMIT] to exit from the TRANSMIT set

mode.

37

5

Tuning dial

[SSB/CW][M/S•BAND][TRANSMIT]

CW

Paddle

Straight key

Microphone

[KEY] jack

[MIC] connector

CW paddle with normal polarity (default)

CW paddle with reverse polarity

CW paddle use as bug-key

Electronic keyer OFF (straight key)

Substitute paddle function
(microphone [UP]/[DN])

RECEIVE AND TRANSMIT

■ Connections for CW

Before operating in CW, select the paddle type using
the SSB/CW set mode.

q Push [SSB/CW] to select CW mode.

•“CW” indicator appears.

w Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

e Push [DN ▼] or [▲ UP] to select the paddle type

item.

•“PAddLE” is displayed.

r Rotate the tuning dial to select the paddle type.

• Push [M-CL 5] for 1 sec. to return to the default setting.

t Push [SSB/CW] to exit the SSB/CW set mode.

■ CW mode operation

q Connect a paddle or straight key as above.
w Push [M/S•BAND] to select the desired frequency

e Push [SSB/CW] to select CW mode.

r Rotate the tuning dial to set the operating fre-

t Push [TRANSMIT] to set the transceiver to transmit

38

band.

• Push [SSB/CW] for 1 sec. to select CW narrow mode
after the CW mode selection when the optional CW nar­row filter, FL-132 (for MAIN band) or FL-133 (for SUB
band), is installed.

quency.

mode.

• The MAIN band indicator lights red.

NOTE: A stereo plug must be used even when a
straight key is used. See page 12 or 15.

NOTE: [UP]/[DN] keying does not function while
pushing [PTT] on the microphone. Push [TRANS­MIT] on the front panel or use the semi break-in
function in this case.

y Operate the paddle or key to transmit the CW sig-

nal.

u Push [TRANSMIT] to return to receive mode.

DD

KEYING WEIGHT EXAMPLE: Morse code “K”

DASH

Weight setting:
1:1:3 (default)

Weight setting:
Adjusted

DASH

DOT

(Fixed*)

Adjustable range SPACE (Fixed*)

*SPACE and DOT length can be adjusted with the

keying speed only.

Setting keying speed

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the keying speed

item.

•“SPEEd” is displayed.

e Rotate the tuning dial to adjust the keying speed to

the desired speed.

• Keying speed can be selected from 6–60 wpm.

•Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

DD

Setting semi break-in function

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the semi break-in

item.

•“br-In” is displayed.

e Rotate the tuning dial to turn the semi break-in func-

tion ON and OFF.

•Push [M-CL 5] for 1 sec. to return to the default setting.

r Push [DN▼] or [▲UP] to select the delay time item.

•“dELAy” is displayed.

t Rotate the tuning dial to set the delay time to the

desired time period.

•Delay time can be selected from 2.0–13.0 sec. in

0.1 sec. steps.

• Push [M-CL 5] for 1 sec. to return to the default value.

y Push [SSB/CW] to exit the SSB/CW set mode.

5

DD

Setting side tone

RECEIVE AND TRANSMIT

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the side tone item.

•“SidE-t” is displayed.

e Rotate the tuning dial to adjust the side tone level

to the desired level.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

DD

Setting keying weight

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the keying weight

item.

•“rAtio” is displayed.

e Rotate the tuning dial to adjust the keying weight

ratio to the desired level.

•Keying weight ratio can be selected from 1:1:2.8 to
1:1:4.5.

•Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

DD

Setting CW pitch

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the CW pitch item.

•“Pitch” is displayed.

e Rotate the tuning dial to adjust the CW pitch to the

desired pitch.

• CW pitch can be adjusted within 300–900 Hz range.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

39

6

F

M

VFO A

MEMO

F

M

MEMO

USBUSB

Select memory mode

Select memory
channel

[UP ∫][DN √]

MEMORY OPERATION

■ Memory channels

The IC-910H has 106 memory channels (99 for regu­lar, 6 scan edges and 1 call) and they are equipped for
each frequency band for storing the most often used
frequencies and operating mode, as well as tone fre­quency, offset frequency, etc.

■ Operation on a memory
channel

Frequency and mode, etc., can be changed in a mem­ory channel. However, they will be cleared if [MW 4] is
not pushed.

DD

Memory channel selection

q Push [V/M 1] to select memory channel mode.

•“MEMO” indicator appears.

w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel.

• Memory channel changes continuously while holding
[DN ▼] or [▲ UP].

• The tuning dial rotation while pushing [F-INP ENT] also
selects memory channel.

e Push [V/M 1] to return to VFO mode.

Memory
Channel

1–99

1A/1b–3A/3b

C

Description

Regular memory channels. Programs op­erating frequency, mode, subaudible tone
activity with frequency and split/duplex
conditions.

Scan edge channels. Programs edge fre­quencies for programmed scan.

Call channel recalls a specified fre­quency on the instant. Programs operat­ing frequency, mode, etc., and is avail­able for each band, independently.

40

DD

During VFO mode operation

By pushing [DN▼] or [▲ UP] during VFO mode opera­tion, memory channel is also selectable. However, the
frequency readout does not change in this case, only
the memory channel number changes.

■ Programming in VFO mode

F

M

VFO A

USBUSB

VFO A

USBUSB

USBUSB

VFO A

VFO A

Select desired memory
channel.

Beep tones sound.

Set desired frequency
and mode.

MEMO

F

M

MEMO

USBUSB

MEMO

USBUSB

MEMO

USBUSB

Set desired frequency
and mode.

Beep tones sound.

Select desired memory
channel.

Memory channel programming can be performed ei­ther in VFO mode or in memory mode.

q Set the desired operating frequency and mode in

VFO mode.

• Push [V/M 1] to select VFO mode, if required.

•Tone frequency, offset frequency, etc., can also be pro-

grammed.

•Input the frequency from the keypad
Push [F-INP ENT] ⇒ [1] ⇒ [4] ⇒ [4] ⇒ [.] ⇒ [2] ⇒ [6]
⇒ [8] ⇒ [F-INP ENT]

w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel to be programmed.

e Push [MW 4] for 1 sec. to program the displayed

frequency and operating mode into the memory
channel.

To check the programmed contents, push [V/M 1] to
select memory mode.

MEMORY OPERATION

6

■ Programming in memory
mode

q Push [V/M 1] to select memory mode.
w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel to be programmed.

•The tuning dial rotation while pushing [F-INP ENT] also
selects memory channel.

e Set the desired operating frequency and mode in

the memory mode.

•Tone frequency, offset frequency, etc., can also be pro­grammed.

•Set the desired operating frequency using with the key­pad when programming into blank channels. The tuning
dial rotation for frequency setting cannot be performed
when a blank channel is selected.

•Input the frequency from the keypad
Push [F-INP ENT] ⇒ [1] ⇒ [4] ⇒ [4] ⇒ [.] ⇒ [1] ⇒ [6]
⇒ [4] ⇒ [F-INP ENT]

r Push [MW 4] for 1 sec. to program the displayed

frequency and operating mode into the memory
channel.

41

6

MEMO

BL

ANAN

K

MEMO

BL

ANAN

K

Operating band appears
after 2 sec.

“--430-” appears while in 430 MHz band.
“-1200-” appears while in 1200 MHz band.

MEMO

USBUSB

MEMO

USBUSB

USBUSB

VFO A

Beep tone sounds.

Select VFO mode.

MEMORY OPERATION

■ Blank channels

Memory channels 6–99 are blank channels by factory
default. They have no contents programmed.

When a blank channel is selected, the “BLANK” indi­cator appears and the frequency band is displayed
2 sec. after the selection.

■ Frequency transferring

The frequency and operating mode in a memory chan­nel can be transferred to the VFO.

Frequency transferring can be performed in either VFO
mode or memory mode.

DD

Transferring in memory mode

This is useful for transferring frequency and operating
mode while operating in memory mode.

When you have changed the frequency or operat­ing mode in the selected memory channel:

• Displayed frequency and mode are transferred.

•Programmed frequency and mode in the memory

channel are not transferred, and they remain in the
memory channel.

DD

Programming a blank channel

q Push [V/M 1] to select VFO mode.
w Set the desired operating frequency, mode, etc.
e Push [MW 4] for 1 sec. to program the memory

channel.

•“BLANK” indicator disappears.

DD

Transferring in VFO mode

This is useful for transferring programmed contents to
VFO.

q Push [V/M 1] to select VFO mode.
w Push [DN ▼] or [▲ UP] to select the memory chan-

nel to be transferred.

•“BLANK” appears if the selected memory channel is a
blank channel. In this case transferring is impossible.

e Push [M≈V 6] for 1 sec. to transfer the frequency

and operating mode.

•Transferred frequency and operating mode appear on
the frequency readout.

q Push [DN ▼] or [▲ UP] to select the memory chan-

nel to be transferred in memory mode.

• And, set the frequency or operating mode if required.

w Push [M≈V 6] for 1 sec. to transfer the frequency

and operating mode.

• Displayed frequency and operating mode are transferred
to the VFO.

e Push [V/M 1] to return to VFO mode.

42

■ Memory clearing

MEMO

USBUSB

MEMO

BL

ANAN

K

Operating band appears
after 2 sec.

MEMO

BL

ANAN

K

Beep tone sounds.

F

M

USBUSB

VFO A

BL

ANAN

K

Any unnecessary memory channels can be cleared.
The cleared memory channels become blank chan­nels.

q Push [V/M 1] to select memory mode.
w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel to be cleared.

e Push [M-CL 5] for 1 sec. to clear the contents.

•The programmed frequency and operating mode disap­pear.

•“BLANK” indicator appears.

r To clear other memory channels, repeat steps w

and e.

MEMORY OPERATION

6

■ Call channel

The call channel is a one-touch accessible channel for
recalling your most-often-used frequency. The IC-910H
has one call channel for each frequency band.

DD

Call up a call channel

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [CALL] to select the call channel.
e Push [CALL] or [V/M 1] to return to previous display.

DD

Call channel programming

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [CALL] to select the call channel.
e Enter the desired frequency using the keypad.

e.g.; When programming 145.8200 MHz.
Push [F-INP ENT] ⇒ [1] ⇒ [4] ⇒ [5] ⇒ [.] ⇒ [8] ⇒
[2] ⇒ [F-INP ENT]

• Select operating mode if required.

r Push [MW 4] for 1 sec. to program the call channel.

DD

Transferring call channel contents

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [CALL] to select the call channel.
e Push [M≈V 6] for 1 sec. to transfer the call channel

contents.

43

6

C

W

F

M

USB

F

M

USB

F

M

VFO A

VFO or memory mode Memo pad contents

C

W

F

M

USB

F

M

USB

VFO or memory mode Memo pad contents

When [MPW 8] is pushed, “FM 145.9200 MHz”
is programmed and the oldest memo pad is
cleared.

Cleared

F

M

VFO A

MEMORY OPERATION

■ Memo pads

The IC-910H has a memo pad function for each fre­quency band to store frequency and operating mode
for easy write and recall. The memo pads are separate
from memory channels.

The default number of memo pads is 5, however, this
can be increased to 10 in the memo pad set mode
(p. 64) if desired.

Memo pads are convenient when you want to memo­rize a frequency and operating mode temporarily, such
as when you find a DX station in a pile-up, or when a
desired station is busy for a long time and you want to
temporarily search for other stations.

Use the transceiver’s memo pads instead of relying on
hastily scribbled notes that are easily misplaced.

DD

Writing frequencies and operating
modes into memo pads

You can simply store the accessed readout frequency
and operating mode by pushing [MPW 8].

When you write a 6th (or 11th) frequency and operat­ing mode, the oldest written frequency and operating
mode are automatically erased to make room for the
new settings.

Each memo pad must have its own unique combi­nation of frequency and operating mode; memo
pads having identical settings cannot be written.

44

DD

Calling up a frequency from a memo pad

You can simply call up the desired frequency and op­erating mode of a memo pad by pushing [MPR 9].

• Both VFO and memory modes can be used.

• The frequency and operating mode are called up, starting

from the most recently written.

SCANS

MEMORY SCAN

Repeatedly scans all programmed memory channels.
This scan operates in memory mode.

M-CH 1

M-CH 5

M-CH 2 M-CH 3 M-CH 4

M-CH 6

M-CH 7

M-CH 99

Call channels and scan edge channels are not scanned.

Blank

7

■ Scan types

Scanning searches for signals automatically and
makes it easier to locate new stations for contact or lis­tening purposes. The IC-910H has several scan types;
programmed scan, memory scan and mode select
scan.

The scanning operation can be performed indepen­dently for MAIN and SUB band. And to search a sub­audible tone frequency for a repeater frequency, a tone
scan is also available.

PROGRAMMED SCAN

Repeatedly scans between two scan edge frequencies
(scan edge memory channels 1A/2A/3A and 1b/2b/3b).
This scan operates in VFO mode.

Scan edge
(1A/2A/3A)

Scan

Jump

Scan starts from the displayed frequency or the lower
scan edge frequency.

MODE SELECT SCAN

Repeatedly scans all selected mode memory channels.
This scan operates in memory mode.

USB

FM FM

FM

FM

Scan edge

(1b/2b/3b)

CW

USBFM

■ Preparation

• Squelch condition

Set the [RF/SQL] control as for regular operation.

• When receiving a signal

•Scan pauses for 10 sec. when receiving a signal, then
resumes.

•When a signal disappears while scan is paused, scan
resumes approx. 3 sec. later.

• Scan resume ON/OFF

You can select the scan to resume or cancel when re­ceiving a signal, in the scan set mode. Scan resume
ON/OFF must be set before operating a scan. See de­tails described at right for ON/OFF setting.

• Scan start/stop operation

Push [SCAN .] to start and cancel scanning.

• Scan speed

Scan speed can be selected from 2 levels, high (de­fault) or low, in the scan set mode. See details de­scribed at right.

• Setting scan resume condition

q Push [SET] then [SCAN .] to enter the scan set

mode.

w Push [DN ▼] or [▲ UP] to select the scan resume

item.

•“SC-rES” is displayed.

e Rotate the tuning dial to select scan resume condi-

tion from ON and OFF.

•“ON”: scan resumes, “oFF”: scan cancels

• Push [M-CL-5] for 1 sec. to return to the default setting.

r Push [SCAN .] to exit from the scan set mode.

• Setting scan speed

q Push [SET] then [SCAN .] to enter the scan set

mode.

w Push [DN ▼] or [▲ UP] to select the scan speed

item.

•“SC-SPd” is displayed.

e Rotate the tuning dial to select scan resume condi-

tion from HI and Lo.

• Push [M-CL-5] for 1 sec. to return to the default setting.

r Push [SCAN .] to exit from the scan set mode.

45

7

F

M

VFO A

60dB

SCA

N

S

1

3 5

7

9

20

40

Flashes while scanning

wSelect

mode.

qSelect VFO

mode.

eStart.
rStop.

MEMO

F

M

USB

LSB

C

W

N

A

TT P.AMP

AFC

N

B

F

AGC

60dB

SCA

N

S

1

3 5

7

9

20

40

SQ

L

T

-

Flashes while scanning

qSelect memory

mode.

wStart.
eStop.

SCANS

■ Programmed scan operation

Scans specified frequency range, programmed in the
memory channel 1A/1b, 2A/2b and 3A/3b. Before start­ing the programmed scan, scan edges should be pro­grammed in these channels.

DD

Selecting scanning range

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [SET] then [SCAN .] to enter the scan set

mode.

e Push [DN ▼] or [▲ UP] to select the programmed

scan item.

•“P-SCAn” is displayed.

r Rotate the tuning dial to select the desired scanning

range from 1A-1b, 2A-2b and 3A-3b.

• Push [M-CL 5] for 1 sec. to return to the default setting.

t Push [SCAN .] to exit from the scan set mode.

DD

Starting the programmed scan

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [V/M 1] to select VFO mode.
e Select the desired operating mode.

•The operating mode can also be changed while scan­ning.

r Push [SCAN .] to start the programmed scan.

•“SCAN” indicator flashes.

• The tuning step setting is used for the scanning step.

•1 kHz or 1 MHz tuning step can also be used as the

scanning step.

t Push [SCAN .] to cancel the scan.

If the same frequency is programmed into the scan
edge memory channel 1A and 1b, 2A and 2b or 3A
and 3b, programmed scan does not start.

■ Memory scan operation

Scans programmed memory channels only. Blank
channels and programmed scan edge channels
(1A/1b, 2A/2b and 3A/3b) are not scanned.

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [V/M 1] to select memory mode.
e Push [SCAN .] to start the memory scan.

•“SCAN” indicator flashes.

• Pushing [SPCH•LOCK] for 1 sec. during scan starts
mode select scan and “LOCK” indicator appears. (p. 47)

r Push [SCAN .] to cancel the scan.

46

■ Mode select scan

MEMO

USBUSB

VFVFOA

F

M

L

OC K

S 1 357

9 2020

4040

60dB60dB

60dB

SCA

N

S

1

3 5

7

9

20

40

Flashes while scanning

wSelect

mode.

qSelect memory

mode.

e appears. rStart.

tStop.

LOCK

F

M

VFO A

60dB

SCA

N

S

1

3 5

7

9

20

40

Flashes while scanning

SQ

L

T

-

qSelect FM mode.

wStart.
eStop.

Scans the memory channels, desired operating mode
is programmed, only.

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [V/M 1] to select memory mode.
e Push [SSB/CW] or [FM] to select the desired oper-

ating mode to be scanned.

• The operating mode can also be changed during scan.

r Push [SPCH•LOCK] for 1 sec.

•“LOCK” indicator appears.

t Push [SCAN .] to start the mode select scan.

•“SCAN” indicator flashes.

y Push [SCAN .] to cancel the scan.

SCANS

7

■ Tone scan

The transceiver can detect a subaudible tone fre­quency in a received signal. By monitoring a signal that
is being transmitted on a repeater input frequency, you
can determine the tone frequency required to access
the repeater.

q Set the desired frequency or memory channel to be

checked for a tone frequency.

w Push [FM] to select FM mode.
e Push [TONE] or [CALL•T-SQL] for 1 sec. to activate

the subaudible tone.

•“T” or “T-SQL” indicator appears.

r Push [SCAN .] for 1 sec. to start the tone scan.

•“SCAN” indicator flashes while scanning.

•Scan stops when a subaudible tone is detected.

•Scan becomes slower or quicker, respectively when the

noise squelch is open or closed.

t Push [SCAN .] for 1 sec. to cancel the scan.

NOTE: The tone scan automatically changes tone
frequency setting to the detected tone frequency.

47

435 MHz
band

435 MHz
band

145 MHz band

145 MHz
band

FUJI 3 (FO-29)

Uplink
Downlink

8

[SATELLITE] for 1 sec.

SATELLITE OPERATION

■ Satellite communications outline

Both satellite mode B (435 MHz uplink, 145 MHz
downlink) and mode J (145 MHz uplink, 435 MHz
downlink) can be operated from the IC-910H, and
mode L can be operated when the optional UX-910

1200 MHz BAND UNIT is installed.

Satellite communications is possible only when a satel­lite is in view and its transponder is activated.

Orbit information

Orbit information describes satellite location, reach­ing angles, etc. This information may be available in
ham magazines or organization issues, such as from
ARRL, RSGB handbook, etc.

Appropriate satellite tracking software is also conve­nient.

•Mode B operating diagram
[Example]: FUJI 3 (FO-29), Mode B

• Uplink frequency:

145.9000–146.0000MHz

• Downlink frequency:

435.8000–435.9000 MHz

• Tracking direction:

Reverse

• CW beacon frequency:

435.7950 MHz

■ Satellite notes

1. NEVER set the output power too high. Too much
power will shorten the satellite’s life.
Set your transmit power so that your downlink sig­nal level is lower than the beacon’s signal level.

2. Confirm a satellite’s operating mode in advance
through documentation (magazines, etc.) or via ap­propriate satellite tracking software. In the wrong
mode, you cannot use the satellite even if you re­ceive its beacon signal.

■ Entering into the satellite

mode

Operating frequencies in satellite mode can be set
both before and after entering into the satellite mode.
Normal and reverse tracking are available.

DD

Transferring the VFO frequency to the
satellite VFO

q Set the downlink frequency (receive) in the MAIN

band.

w Set the uplink frequency (transmit) in the SUB band.

3. Preamplifiers may be necessary to receive satellite
signals. Optional AG-25, AG-35 and AG-1200 (for
UX-910) are available to use with the IC-910H.
(p. 16)

4. When you use a reverse tracking satellite in SSB
mode, use the LSB for the uplink frequency and
USB for the downlink frequency.

•When using a normal tracking satellite in SSB mode,

use USB for both the uplink and downlink frequencies.

e Push [SATELLITE] for 1 sec. to transfer the fre-

quencies, set in steps q and w, into the satellite
VFO.

•Satellite mode is automatically selected after transfer-

ring.

•“SATL” indicator with either “NOR” or “REV” indicator ap-

pears.

•VFO and memory mode indications are displayed in the

SUB band (lower area) during satellite mode.

48

■ Setting the satellite VFO

USBUSB

MEMO

L

SB

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

USBUSB

MEMO

L

SB

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

USBUSB

MEMO

L

SB

NOR

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

Satellite mode indication

Varies simultaneously

[SATELLITE]

[F-INP ENT]

SATELLITE OPERATION

8

q Push [SATELLITE] to enter the satellite mode.

•“SATL” indicator with either “NOR” or “REV” indicator ap-
pears.

w Push [V/M 1] to toggle satellite VFO and memory

mode.

•VFO or memory mode indicator is displayed in the SUB
band (lower area).

e Push [SCAN . ] to enable the downlink frequency

tuning.

• Uplink frequency indication disappears.

•Rotate the tuning dial to set the downlink frequency and

push [SSB/CW] to select the operating mode.

• Push [SCAN . ] again after the tuning.

r Push [SWP 0 Œ] to enable the uplink frequency tun-

ing.

• Downlink frequency indication disappears.

• Push [SWP 0 Œ] again after the tuning.

NOTE: To select the operating mode for the uplink,
push [SUB] to enable the SUB band access.

■ Tracking selection

•Push [F-INP ENT ] for 1 sec. to switch be-
tween normal and reverse tracking.

DD

Normal tracking

Both downlink and uplink frequencies increase or de­crease in the same step simultaneously by tuning dial
rotation.

NOR ↔REV

DD

Reverse tracking

The downlink frequency follows the tuning dial rotation,
however, the uplink frequency changes in the reverse
direction to the tuning dial rotation in the same step.

49

8

USBUSB

MEMO

L

SB

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

USBUSB

MEMO

L

SB

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

USBUSB

MEMO

U

SB

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

USBUSB

MEMO

L

SB

NOR

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

Satellite mode indication Uplink (transmit) frequency

Downlink (receive) frequency

SATELLITE OPERATION

■ Preparation

q Decide on a usable satellite.
w Confirm the approximate location of the satellite and

operating mode (e.g. “B,” “J,” etc.) through docu­mentation (magazine, etc.) or via appropriate satel­lite tracking software.

e Set the antenna direction for the desired satellite.
r Select satellite mode on the transceiver.

• Push [SATELLITE].

• Push [F-INP ENT ] for 1 sec. to select track-

ing mode if desired.

t Select operating mode.

Satellite

Reverse tracking type USB (or CW) LSB (or CW)

Normal tracking type USB (or CW) USB (or CW)

NOR ↔REV

Downlink Uplink

(MAIN band) (SUB band)

u Perform a loop test.

•Set the downlink frequency (MAIN band) to a vacant fre­quency within the satellite’s coverage.

•Push [SWP 0

Œ] then, set the uplink frequency (SUB

band) while transmitting a single tone such as a whistle
to find your downlink signal and monitor your own signal
correctly. Push [SWP 0 Œ] after setting.

NOTE: To avoid excessive power, set the output
power so that the downlink signal strength is lower
than the beacon’s strength.

y Set the downlink frequency (MAIN band) to the bea-

con frequency.

• Refer to a ham magazine or book for detailed informa­tion.

• Adjust the antenna direction so that the S-meter shows
to its strongest level.

• The S-meter level should be noted for transmit power
adjustment during a loop test.

50

i Set the desired frequency to begin your satellite

communications.

•Both the downlink and uplink frequencies are changed
simultaneously.

o When your downlink audio drifts (Doppler effect),

push [SWP 0 Œ] then rotate the tuning dial to adjust
the uplink frequency (SUB band) only.
Push [SWP 0 Œ] again after setting.

•When a particular station’s audio is off frequency, use
the RIT function (push [RIT]).

!0 To exit the satellite operation, push [SATELLITE].

CONVENIENT: As the transceiver has 10 satellite
memory channels, once set, desired satellite fre­quencies can be recalled instantly.

NOTE: As the downlink (MAIN band) signal is ap­plied to the SUB band unit in-circuitry in satellite
mode, an optional FL-133

CW NARROW FILTER

is nec-

essary to operate CW-N mode.

■ Satellite operation

USBUSB

MEMO

L

SB

SAT

L

RE

V

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

Select the desired
satellite memory

USBUSB

MEMO

L

SB

NOR

SAT

L

S 1 357

9 2020

4040

60dB60dB

60dB

S

1

3 5

7

9

20

40

Satellite memory
indication

When your own signal can be received with a loop
test, satellite communication can be performed.

q Rotate the tuning dial to re-tune the uplink fre-

quency after pushing [SWP 0 Œ], when shifting a fre-
quency with the Doppler effect.

•The downlink frequency readout (MAIN band) disap­pears.

w Rotate the tuning dial to re-tune the downlink fre-

quency after pushing [SCAN . ], when the operat­ing station’s signal frequency is shifted.

•RIT function can also be used for downlink frequency
tuning within ±1 kHz range.

■ Satellite memory

SATELLITE OPERATION

8

The IC-910H has 10 satellite memory channels to
memorize both uplink and downlink frequencies and
operating modes, etc.

DD

Satellite memory selection

q Push [SATELLITE] to enter the satellite mode.
w Push [V/M 1] to select satellite memory mode.

•“MEMO” indicator and memory channel number are dis-
played beside the uplink frequency (SUB band) indica­tion.

• Push [V/M 1] again to select satellite VFO.

e Push [DN ▼] or [▲ UP] to select the desired satel-

lite mode memory channel.

• The channels 00–09 are selectable.

•By pushing and holding either switch, the satellite mem-

ory channel changes continuously.

DD

Satellite memory programming

q Select the desired satellite memory channel.

• Push [SATELLITE] to enter the satellite mode.

• Push [V/M 1] to select satellite VFO mode.

•Push [DN ▼] or [▲ UP] to select the desired satellite

mode memory channel.

w Set the desired downlink frequency to the MAIN

band and uplink frequency to the SUB band, as well
as operating mode.

•Push [SCAN . ] for downlink tuning, push [SWP 0 Œ] for
uplink frequency tuning.

•Push [SUB] before the operating mode selection when
selecting operating mode for the uplink.

e Push [MW 4] for 1 sec. to program the set contents

to the satellite memory channel.

• 3 beep tones sound.

NOTE: Tracking selection, normal or reverse, is not
programmed in the satellite memory channels.

51

9

q DATA IN

SQL*

PTT

RX AUDIO

GND

TX AUDIO

TNC

w GND

e

PTT

r

DATA OUT

Shielding cable

q DATA IN

SQL*

PTT

RX AUDIO

GND

TX AUDIO

TNC

w GND

e

PTT

y

SQ*

t

AF OUT

Shielding cable

•9600 bps connection •1200 bps connection

* Connect the SQL line when required.

[DATA] socket

(Rear panel view)

[DATA] socket

(Rear panel view)

* Connect the SQL line when required.

y SQ*

DATA COMMUNICATION

■ Functions for AFSK

The IC-910H does not have an FSK mode for RTTY,
AMTOR, PACKET, etc., however, you can operate
these using AFSK in SSB or FM mode.

The transceiver accepts data speed of up to 9600 bps.
When using 9600 bps, set the transceiver to the 9600
bps data mode using the general set mode. (p. 57)

When operating AFSK, connect external equipment to
the DATA (MAIN or SUB) or ACC socket on the rear
panel, or to the microphone connector on the front
panel as in the diagram below.

■ Connections for AFSK

DD

Connections via [DATA] socket

Use FM mode for 9600 bps operation.
Use SSB or FM mode for 1200 bps operation.

OPERATION NOTES FOR 9600 bps

• Set the transceiver to 9600 bps data mode.

- See p. 57.

•Set AFSK/GMSK output level of the terminal unit to

0.4 V p-p (0.2 V rms).

-When exceeding 0.5 V p-p (0.25 V rms), the trans­ceiver’s modulation limiter stops modulation.

- At this time, the [RX/TX] indicator’s brightness fades.

•AF output from the transceiver is continuous and is
not cut by the squelch circuit.

DD

Connections via [ACC(1)] socket or [MIC] connector

Use FM mode for 9600 bps operation.
Use SSB or FM mode for 1200 bps operation.

•Connection via [ACC(1)] connector

A

2

(Rear panel
view)

4

1

8

6

•Connection via [MIC] connector

(Front panel
view)

1

2

8

3

4

52

B

5

C

3

D

7

E
F

*

A
C

7

B

6

E

5

D

F

*

A

B

C

D

E

F

AFSK output

AF input

PTT

GND

Squelch input

TNC

TX AUDIO

GND

RX AUDIO
(1200 bps)

PTT

GND

SQL*

* Connect the SQL line when required.

DATA COMMUNICATION

qSelect

band.

wSelect desired

mode.

eAdjust for max.

detected level.

9

■ Operating mode notes

Use FM mode for 9600 bps operation.
Use SSB or FM mode for 1200 bps operation.

■ Operating frequency notes

DD

Operating notes for RTTY and AMTOR

RTTY or AMTOR operating frequency in LSB mode
differs from the displayed frequency.

[Your operating freq.] = [Displayed freq.] – 2125 Hz

(when the frequencies of the RTTY demodulator in
your TNC or TU are — mark = 2125 Hz and space =
2295 Hz).

DD

Operating notes for PACKET

PACKET operating frequency in LSB mode differs from
the displayed frequency.

[Your operating freq.] = [Displayed freq.] – 2125 Hz

(when the frequencies of the PACKET demodulator in
your TNC are — 2125 Hz/2315 Hz).

DD

Frequency setting example for AFSK

- When operating RTTY at 144.090 MHz:
Set “LSB 144.092125 MHz” (if you use mark=2125 Hz
and space=2295 Hz).

- When operating PACKET at 144.110 MHz:
Set “LSB 144.112215 MHz” (if you use
2115 Hz/2315 Hz).

■ AFSK operation

Connect external equipment to either the [DATA]
(MAIN or SUB) or [ACC(1)] socket as described on the
previous page. Set the ACC socket using the general
set mode in advance when you operate via the ACC
socket. (See below.)

q Push [M/S•BAND] to select the desired frequency

band.

w Push [FM] or [SSB/CW] to select the desired oper-

ating mode.

• LSB is normally used.

• FM is used for PACKET.

e Adjust the audio output level with [AF] control.

• Use [RF/SQL] when required.

r Adjust the desired RF output power.

•When using the [MIC] connector for external equipment
connection, the [MIC GAIN] control should be adjusted.

t Select operating mode.
y Control the transceiver from the connected PC or

TNC (TU).

IMPORTANT:

•Remove the microphone from the [MIC] connector
when operating below 1200 bps rate to protect
from noise coming from the microphone.

•During 9600 bps rate operation, noise signals from
the microphone may not effect PACKET signals.
However, PACKET signal transmission is inter­rupted when [PTT] is pushed.

•Remove the ACC plug, or turn the TNC power OFF
during phone operation (SSB or FM). The modula­tion input from the [ACC(1)] socket is always ap­plied to the modulation circuit.

DD

Connections via front panel

When connecting a TNC or Scan converter, etc. to the
[MIC] connector, [MIC GAIN] and [AF] adjustments are
required. The [MIC] connector accepts up to 1200 bps.
Use SSB or FM mode for operation.

[MIC GAIN] and [AF] control adjustments are re­quired.

53

9

DATA COMMUNICATION

DD

Adjusting the transmit signal output
from the TNC

When setting the data transmission speed to 9600
bps, the data signal coming from the TNC is applied
exclusively to the internal limiter circuitry to control the
transmission.

NEVER apply data levels from the TNC of over

0.6 V p-p, otherwise the transceiver automatically
cancels the transmission.

1. When using a level meter or synchroscope, ad­just the TX audio output level (DATA IN level)
from the TNC as follows.

0.4 V p-p (0.2 V rms): recommended level

0.2–0.5 V p-p (0.1–0.25 V rms): acceptable level

2. When NOT using a measurement device.

q Connect the transceiver to a TNC.
w Enter a test mode (“CAL”, etc.) to the TNC, then

transmit some test data.

e When the transceiver fails to transmit the test

data or transmits sporadically (TX indicator does
not appear or flashes):

-Decrease the TNC output level until the trans­mit indicator lights continuously.

When transmission is not successful even though
the TX indicator lights continuously:

- Increase the TNC output level.

■ Setting the ACC socket

When operating AFSK, set the specifications of the
ACC socket to fit your TNC or scan converter in ad­vance.

q Push [SET] for 1 sec. to enter the set mode.
w Push [DN ▼] or [▲ UP] to select the 9600 bps data

mode setting item, then rotate the tuning dial to turn
the 9600 bps rate ON and OFF
Push [SWP 0] again after setting.

•“9600” is displayed.

• 9600 bps data rate is selected when ON, and a slower

data rate is selected when OFF is selected.

• Push [M-CL 5] for 1 sec to return to the default setting.

e Push [▲ UP] to select ACC socket pins 5 and 6 set-

ting item, then rotate the tuning dial to select from

“nor” (normal) and “Sub” (sub).

•“ACC P5.6” is displayed.

• When “nor” (normal) is selected, the ACC socket (pins 5

and 6) outputs MAIN band signals. When “Sub” is se­lected, the ACC socket outputs SUB band signals.

• Push [M-CL 5] for 1 sec to return to the default setting.

NOTE: Select “nor” (normal) when operating data
mode in satellite mode.

r Push [▲ UP] to select the modulation signal input

level setting item, then rotate the tuning dial to se­lect from “HI” and “Lo” (sub).

•“ACC.t-AF” is displayed.

• HI: 200 mV rms, Lo: 2 mV rms

• Push [M-CL 5] for 1 sec to return to the default setting.

•This setting is ignored when 9600 bps data mode (w) is

selected and 1.0 V p-p is set as a fixed value.

t Push [SET] to exit from the set mode.

54

■ Set mode description

F

M

VFO A

VFOA

F

M

S 1 357

9 2020

4040

60dB60dB

S

1

3 5

7920

40

60dB60dB

SCA

N

SCA

N

SCA

N

F

M

VFO A

VFOA

SET

F

M

S 1 357

9 2020

4040

60dB60dB

S

1

3 5

7920

40

60dB60dB

qw ert

Tuning dial

Exit set mode.

Push applicable key

applicable

Independent
set mode
appears.

Select condition.

Push applicable

key or [SET] key.

Push [SET] momentarily.

applicable keys

Select set mode item.

q

Push [SET] for 1 sec. General set mode appears.

wer

Tuning dial

Exit set mode.Select condition.

Push applicable

key or [SET] key.

Select set mode item.

•SET MODE FLOW CHART

applicable

Set mode is used for programming infrequently
changed values or conditions of functions. The
IC-910H has a regular set mode and additional 12 in­dependent set modes for simple condition changing.

DD

Set mode operation

q Push [SET] for 1 sec. to enter the general set mode.
w Push [DN Z] or [UP Y] to select the desired item.
e Set the desired condition using the tuning dial.

•Push [M-CL 5] for 1 sec. to select a default condition or
value.

r Push [SET] to exit the set mode.

DD

Independent set mode operation

q Push [SET].

SET MODE

10

e Push [DN Z] or [UP Y] to select the desired item.
r Set the desired condition using the tuning dial.

•Push [M-CL 5] for 1 sec. to select a default condition or
value.

t Push the applicable switch, pushed in step w, or

[SET] to exit the set mode.

w Push 1 of following switches/keys to enter the inde-

pendent set mode.
[SPCH], [FM], [SSB/CW], [SCAN], [MPW], [COMP],
[VOX], [TRANSMIT], [NR], [RIT], [ATT], [SWP]

55

10

SET MODE

■ General set mode

Display backlight brightness

Adjust backlight brightness for the function display to
the desired level within 0 (dark) to 100 (bright) range.

Beep tone

Adjust key touch beep output level to the desired level
within 0 (no output) to 100 (max. output) range.

RF/SQL control assignment

Assign [RF/SQL] control function from rF/SqL, Auto
and SqL.

• rF/SqL: RF gain and squelch controls are combined
for SSB/CW mode. Acts as squelch control
for FM mode.

• Auto : Acts as either an RF gain or squelch control
depending on operating mode.

• SqL : Acts as squelch control for all modes. RF
gain is set to maximum level in this setting.

Peak hold function

Turn the S-meter peak hold function ON or OFF.
The peak level is indicated for approx. 0.5 sec. when
this function is activated.

56

Microphone UP/DN speed

96009600

Select continuous changing speed with microphone’s
[UP]/[DN] operation from high and low.

Tuning step selection HI Lo

Below 1 kHz 50 steps/sec. 25 steps/sec.

Above 1 kHz below 1 MHz 20 steps/sec. 10 steps/sec.

1 MHz or Memory Channel

5 steps/sec. 2.5 steps/sec.

9600 bps data transmission

Turn the 9600 bps data transmission capability ON
and OFF.

• on : For 9600 bps data transmission.

• oFF : For the regular audio (or slower data) trans-

mission only.

SET MODE

10

Auto TS function

Turn the auto TS function ON and OFF.

This function temporarily changes tuning step when
rotating the tuning dial quickly.

The auto TS function automatically selects a 10 or
50 Hz tuning step, when 1 or 10 Hz tuning step is
used for regular operation, respectively.

Fine tuning indication

Turn the fine tuning indication (10 and 1 Hz digit indi­cation) during the tuning dial rotation ON and OFF.

Headphone audio

Switch the audio output separation capability for the
headphones ON and OFF.

• on : The MAIN and SUB band audio is sepa-
rated in right (MAIN) and left (SUB) chan­nels when using stereo headphones.

• oFF : The MAIN and SUB band audio is mixed.

ACC socket Pin 5 and Pin 6

Select the band for output signals from the ACC
socket pins 5 (AF) and 6 (SQL) from normal and sub.

• nor : Outputs MAIN band’s signals.

• Sub : Outputs SUB band’s signals.

57

10

P.AM P P.AM P

SET MODE

ACC socket Pin 8

Assign the ACC socket pin 8 action/connection from
ALC and microphone up/down.

• ALC : Inputs ALC signal.

• ud : Inputs up/down signals from the microphone.

ACC socket Pin 4/DATA socket Pin 1

Select modulation signal input level from high and
low.

• HI : High modulation signal level (200 mV rms)

• Lo : Low modulation signal level (2 mV rms)

ACC socket Pin 3 for 144 MHz band

Switch the SEND signal output for 144 MHz band op­eration ON and OFF.

ACC socket Pin 3 for 430(440) MHz band

Switch the SEND signal output for 430(440) MHz
band operation ON and OFF.

ACC socket Pin 3 for 1200 MHz band

Switch the SEND signal output for 1200 MHz band
operation ON and OFF.

Preamplifier controller for 144 MHz

Switch the preamplifier control capability ON and
OFF. When using the optional AG-25, ON must be se­lected. Otherwise, the preamplifier is never activated.

DO NOT connect any equipment, such as an SWR
or power meter, between the transceiver and pre­amplifier. In such case, the preamplifier may not
activate properly.

58

Preamplifier controller for 430(440) MHz

P.AM P P.AM P

P.AM P P.AM P

Switch the preamplifier control capability ON and
OFF. When using the optional AG-35, ON must be se­lected. Otherwise, the preamplifier is never activated.

DO NOT connect any equipment, such as an SWR
or power meter, between the transceiver and pre­amplifier. In such case, the preamplifier may not
activate properly.

Preamplifier controller for 1200 MHz

Switch the preamplifier control capability ON and
OFF. When using the optional AG-1200, ON must be
selected. Otherwise, the preamplifier is never acti­vated.

DO NOT connect any equipment, such as an SWR
or power meter, between the transceiver and pre­amplifier. In such case, the preamplifier may not
activate properly.

SET MODE

10

CI-V address

To distinguish between equipment, each CI-V trans­ceiver has its own Icom standard address in hexa­decimal code. The IC-910H’s address is 60H.

When 2 or more IC-910Hs are connected to an op­tional CT-17

CI-V LEVEL CONVERTER

, select a different

address for each IC-910H in the range 01H to 7FH.

CI-V baud rate

Select transfer rate for CI-V remote control from Auto,
300, 1200, 4800, 9600 and 19200 bps.

CI-V transceive

Transceive operation is possible with the IC-910H
connected to other Icom transceivers or receivers.

When “on” is selected, changing the operating fre­quency, operating mode, etc. on the IC-910H auto­matically changes those of connected transceivers (or
receivers) and vice versa.

59

10

F

M

F

M

F

M

F

M

T

F

M

T

F

M

T

SET MODE

■ FM set mode

Offset frequency for 144 MHz

Set the offset frequency for duplex (repeater) opera­tion within 0–10.00000 MHz range.
This item is displayed when the 144 MHz band is ac­cessed, including the SUB band access capability.

• Default value: 0.6000

Offset frequency for 430(440) MHz

Set the offset frequency for duplex (repeater) opera­tion within 0–10.00000 MHz range.
This item is displayed when the 430(440) MHz band
is accessed, including the SUB band access capabil­ity.

• Default value: 5.0000

Offset frequency for 1200 MHz

Set the offset frequency for duplex (repeater) opera­tion within 0–100.00000 MHz range.
This item is displayed when the 1200 MHz band is
accessed, including the SUB band access capability.

• Default value: 20.0000

Tone encoder frequency for 144 MHz

(except Europe, Sweden and Italy versions)

Select tone encoder frequency for accessing a re­peater, etc. from one of 50 available tone frequencies.
This item is displayed when the 144 MHz band is ac­cessed, including the SUB band access capability.

• Default value: 88.5

Tone encoder frequency for 430(440) MHz

(except Europe, Sweden and Italy versions)

Select tone encoder frequency for accessing a re­peater, etc. from one of 50 available tone frequencies.
This item is displayed when the 430(440) MHz band is
accessed, including the SUB band access capability.

• Default value: 88.5

60

Tone encoder frequency for 1200 MHz

(except Europe, Sweden and Italy versions)

Select tone encoder frequency for accessing a re­peater, etc. from one of 50 available tone frequencies.
This item is displayed when the 1200 MHz band is
accessed, including the SUB band access capability.

• Default value: 88.5

Tone squelch frequency for 144 MHz

F

M

-SQSQLT

F

M

-SQSQLT

F

M

-SQSQLT

DUPDUP

F

M

DUPDUP

F

M

F

M

F

M

F

M

F

M

Select tone squelch frequency from one of 50 avail­able tone frequencies.
This item is displayed when the 144 MHz band is ac­cessed, including the SUB band access capability.

• Default value: 88.5

Tone squelch frequency for 430(440) MHz

Select tone squelch frequency from one of 50 avail­able tone frequencies.
This item is displayed when the 430(440) MHz band
is accessed, including the SUB band access capabil­ity.

• Default value: 88.5

Tone squelch frequency for 1200 MHz

Select tone squelch frequency from one of 50 avail­able tone frequencies.
This item is displayed when the 1200 MHz band is
accessed, including the SUB band access capability.

• Default value: 88.5

SET MODE

10

One-touch repeater shift direction

(except Europe, Sweden and Italy versions)

Select shift direction for one-touch repeater function
from DUP– and DUP+.

Auto repeater function

(U.S.A. and Korea versions)

Turn the auto repeater function ON and OFF.
To activate the auto repeater function, ON must be
selected in this setting after programming the auto re­peater frequency range. (p. 34)

U.S.A. version:

•“on1” Activates duplex only.

•“on2” Activates duplex and tone.

•“oFF” Auto repeater function is turned OFF.

FM center indicator

Turn the FM center indication ON and OFF.
When the indication is turned ON and the received
signal is off-center in FM mode, the receive indicator
(green) flashes.

Korea version:

•“ON” Activates duplex and tone.

•“OFF” Auto repeater function is turned OFF.

61

10

LSBU

SB

LSBU

SB

CW

CW CW

CW CW

CW CW

SET MODE

■ SSB/CW set mode

Squelch threshold

Select the squelch threshold level from 12 and 13 o’-
clock.

• 12 : The squelch closes around the 12 o’clock po-
sition of the [SQL] control.

• 13 : The squelch closes around the 13 o’clock po-
sition of the [SQL] control.

Carrier frequency

Adjust the carrier frequency for SSB (USB/LSB)
mode operation within –200 to +200 Hz range in
10 Hz steps.

CW pitch frequency

Adjust the CW pitch frequency within 300 to 900 Hz
range in 10 Hz steps.

CW keying speed adjustment

Adjust the built-in electric keyer keying speed to the
desired level within 6 to 60 WPM range.

Semi break-in

Turn the semi break-in function ON and OFF.

62

CW break-in delay

Adjust the CW break-in delay time to the desired level
within 2.0 to 13.0 sec. range in 0.1 sec. steps.

AF control relation

CW CW

CW CW

CW CW

CW

USBUSB

LSB

C

W

F

M

Turn the relation of [AF] control for CW side tone out­put level ON and OFF.

• on : CW side tone output level is adjustable via
[AF] control adjustment.

• oFF : CW side tone output level is fixed regard-
less of [AF] control setting.

CW side tone output level

Adjust the CW side tone output to the desired level
within 0 (no output) to 100 (maximum output) range.

SET MODE

10

Key type

Select the key type from normal, reverse, bug, OFF
and microphone [UP]/[DN].

• n : Use built-in electronic keyer.

• r : Use built-in electronic keyer with reversed

polarity.

• buG : Use built-in electronic keyer as bug key.

• oFF : Use external electronic keyer or straight key.

• ud : Use microphone’s [UP]/[DN] as a paddle.

CW dot-dash ratio

Adjust the CW dot-dash ratio to the desired level
within 1:1:2.8 to 1:1:4.5 range.

C/N type for 1200 MHz

Select the C/N type for the 1200 MHz band operation
from type 1 and 2.

• tyPE 1 : Provides better characteristics for nearby in­terference in FM mode operation.

• tyPE 2 : Provides lower noise level just around the
signal in SSB/CW mode operation.

This item is displayed only when the optional UX-910
is installed.

63

10

SCA

N

SCA

N

SCA

N

SCA

N

COMPMP

SCA

N

SCA

N

SET MODE

■ Scan set mode

Programmed scanning range

Select the programmed scan range from 1A-1b, 2A­2b and 3A-3b.

• 1A-1b : Scans within the range programmed in the
memory channel 1A and 1b.

• 2A-2b : Scans within the range programmed in the
memory channel 2A and 2b.

• 3A-3b : Scans within the range programmed in the
memory channel 3A and 3b.

Scan resume condition

Select the scan resume condition from ON and OFF.

• on : Scan resumes.

• oFF : Scan cancels when a signal is received.

Scanning speed

Select the scanning speed from high and low.

Scan type HI Lo

Memory scan (Mode select)

Prog. scan (TS<1 kHz) 50 steps/sec. 25 steps/sec.

Prog. scan (TS>1 kHz) 20 steps/sec. 10 steps/sec.

Tone scan 20 steps/sec. 10 steps/sec.

20 CH/sec. 10 CH/sec.

■ Memo pad set mode

Number of memo pad channels

Select the number of memo pad channels available
from 5 and 10.

• 5 : 5 memo pad channels can be used.

• 10 : 10 memo pad channels can be used.

64

■ Compressor set mode

Compression level

Adjust the compression level for the speech com­pressor to the desired level within 0–100% range.

■ VOX set mode

VOX

VOX

VOX

VOX sensitivity

Adjust the VOX sensitivity within 0–100% range.

VOX delay time

Adjust the transmit-to-receive switching delay to the
desired level within 0.0 sec. to 2.0 sec. range in

0.1 sec. steps.

SET MODE

10

Anti VOX

Adjust the anti VOX gain within 0–100% range.

■ Attenuator set mode

Attenuation level for 144 MHz

Adjust the attenuation level to the desired level within
0–100% range for the 144 MHZband operation.

Attenuation level for 430(440) MHz

Adjust the attenuation level to the desired level within
0–100% range for the 430(440) MHZband operation.

65

10

SUB

SUB

SET MODE

■ Transmit set mode

Time-out timer

Select the time period for the time-out timer function
from OFF, 3, 5, 10, 20 and 30 min.

PTT lock

Turn the transmission inhibit capability ON and OFF.
Any control for transmission is inhibited when this
item is ON.

SUB band mute

Turn the SUB band audio mute function ON and OFF.
The SUB band audio is muted while transmitting
when this function is turned ON.

66

N

R

SWP

■ NR set mode

N

R

N

R

Noise reduction level for 144 MHz

Adjust the noise reduction level to the desired level
within 0–15 for the 144 MHz band operation.
Adjust it to the level that noise signals are reduced,
and received audio has no distortion.

This item is displayed only when the optional UT-106
is installed.

Noise reduction level for 430(440) MHz

Adjust the noise reduction level to the desired level
within 0–15 for the 430(440) MHz band operation.
Adjust it to the level that noise signals are reduced,
and received audio has no distortion.

This item is displayed only when the optional UT-106
is installed.

SET MODE

10

Noise reduction level for 1200 MHz

Adjust the noise reduction level to the desired level
within 0–15 for the 1200 MHz band operation.
Adjust it to the level that noise signals are reduced,
and received audio has no distortion.

This item is displayed only when the optional UT-106
is installed.

■ SWP set mode

Sweeping interval

Select the sweeping interval for the simple band
scope function from 3, 5 and 10 sec.

67

10

SET MODE

■ RIT/SHIFT set mode

RIT control assignment

Assign [RIT] control function from rit, dIAL, SubdIAL
and Sub-SFt.

• rit : [RIT] control functions as RIT control.

• dIAL : [RIT] control functions as tuning dial for

MAIN band.

• SubdIAL : [RIT] control functions as tuning dial for

SUB band.

• Sub-SFt : [RIT] control functions as IF shift control

for SUB band.

SHIFT control assignment

Assign [SHIFT] control function from SFt, Sub-SFt,
dIAL and SubdIAL.

• SFt : [SHIFT] control functions as IF shift con-

trol.

• Sub-SFt : [SHIFT] control functions as IF shift con-

trol for SUB band.

• dIAL : [SHIFT] control functions as tuning dial

for MAIN band.

• SubdIAL : [SHIFT] control functions as tuning dial

for SUB band.

68

RIT indication

Turn the RIT adjusting value indication ON and OFF.
The value is displayed while adjusting when this func­tion is turned ON.

■ Speech set mode

Output level

Adjust the speech audio output level within 0 (no out­put) to 100 (maximum output) range.

• Default value: 50

Announcement language

Select the announcement language from English,
Japanese and OFF.

• EnG : Announces in English.

• JPn : Announces in Japanese

• oFF : No announcement.

SET MODE

10

Announcement speed

Select the announcement speed from high and low.

• HI : Faster announcement.

• Lo : Slower announcement.

S-meter level announcement

Turn the S-meter level announcement capability ON
and OFF.

• on : Announces S-meter level with the operating
frequency.

• oFF : Announces the operating frequency only.

69

11

Circuitly fuse
(FGB 4 A)

Cooling fan

J1801
for UT-102
connection

SSB filter
(MAIN band)

CW-N filter
(MAIN band)

CW-N filter
(SUB band)

SSB filter
(SUB band)

MAIN unit

PLL unit

DSP unit

PLL ref. signal

(for UX-910)

DSP unit

DC power

connector

OPTION INSTALLATIONS

■ Internal view

• Top view — PA unit

• Bottom view — PLL/MAIN unit

70

Disconnect the
speaker cable.

■ Opening the transceiver’s case

UT-102

MAIN unit

J1801

grounding plate

Follow the case and cover opening procedures
shown here when you want to install an optional
unit or adjust the internal units, etc.

q Remove the 5 screws from the top of the

transceiver and the 4 screws from the sides,
then lift up the top cover.

w Turn the transceiver upside down.
e Remove the 5 screws from the bottom of the

transceiver, then lift up the bottom cover.

CAUTION: DISCONNECT the DC power

cable from the transceiver before performing
any work on the transceiver. Otherwise, there
is a danger of electric shock and/or equipment
damage.

OPTION INSTALLATIONS

11

DD

Opening the PA unit cover

q Remove the 8 screws and grounding plate from the

PA unit cover.

w

Remove fastening tape from the inside power cable.

■ UT-102 VOICE SYNTHESIZER UNIT

The UT-102 announces the accessed readout’s fre­quency, mode, etc. (S-meter level can also be an­nounced—p. 69) in a clear, electronically-generated
voice, in English (or Japanese).
➥ Push [SPCH] to announce the frequency, etc.

e Slide the PA unit cover as shown below.

q Remove the bottom cover as shown above.

•Remove the UX-910 if you have installed it. (p. 73)

w Remove the protective paper attached to the bot-

tom of the UT-102 to expose the adhesive strip.

e Plug UT-102 into J1801 on the MAIN unit as shown

in the diagram at right.

r Return the bottom cover to its original position.
t Set the speech level, announcement language and

S-meter announcement in the speech set mode
(p. 69) if desired.

71

11

J1781

J1761

J3

J1

Shielding plate

UT-106

MAIN unit

PLL unit

Take care of the
conductor direction.

P1

J1

Set cable into the groove.

Take care of the
conductor direction.

J1771

J3

J1

J1751

Shielding plate

UT-106

MAIN unit

P1

PLL unit

OPTION INSTALLATIONS

■ UT-106

DSP UNIT

The UT-106 provides AF DSP functions such as noise
reduction and auto notch.

Up to 2 DSP units can be installed for simultaneous
DSP operation for both MAIN and SUB bands.

When only 1 DSP unit is installed, DSP functions can
be operated in either the MAIN or SUB band,
whichever is being accessed.

NOTE: The insulating soft case is not used with the
IC-910H.

RECOMMENDATION:

When installing only 1 DSP unit, you can install into
either front or rear panel side. However, installing a
DSP unit into the front panel side may be easier and
also safer.

DD

Installing 1st DSP unit (front panel side)

q Remove the top and bottom covers.

• Remove the UX-910 if you have installed it. (p. 73)

w Remove the shielding plate.
e Remove the connection cable from J1751 on the

MAIN unit. Connect the cable into J1 on the
UT-106.

r Plug the connection cable (P1) from the UT-106 to

J1751 on the MAIN unit.

t Plug the flat cable into J3 on the UT-106 and to

J1771 on the MAIN unit.

• Take care of the conductor direction.

• Attach the Velcro tape to the UT-106 and PLL unit

shielding plate.

y Return the shielding plate, top cover and bottom

cover to their original positions.

DD

Installing 2nd DSP unit (rear panel side)

q Remove the top and bottom covers.

•Remove the UX-910 if you have installed it. (p. 73)

w Remove the shielding plate.
e Remove the connection cable from J1761 on the

MAIN unit. Connect the cable into J1 on the
UT-106.

The cable between J1221 on the MAIN and J1
on the DSP unit, must be set in the groove of the

chassis (see diagram below).
Otherwise, the cable may be damaged when re­turning the shield plate to its original position.

r Plug the connection cable (P1) from the UT-106 to

J1761 on the MAIN unit.

t Plug the flat cable into J3 on the UT-106 and to

J1781 on the MAIN unit.

• Take care of the conductor direction.

•Attach the Velcro tape to the UT-106 and PLL unit

shielding plate.

y Return the shielding plate, top cover and bottom

cover to their original positions.

72

OPTION INSTALLATIONS

Antenna plate

UX-910

Turn the flexible flat cable up under the UX-910.

J2

MAIN unit

Flexible flat cable

UX-910

J541

J2

UX-910

PLL unit

Power connector

DC power cable

Coaxial cable

Flexible flat cable

11

■ UX-910

1200 MHz BAND UNIT

The UX-910 is a band unit for 1200 MHz band opera­tion. FM, SSB (USB/LSB), CW and CW narrow mode
operations are available.

q Remove the bottom cover as shown in the diagram

on p. 71.

w Remove the antenna plate from the chassis using

a standard screw driver.

WARNING!
NEVER attempt to remove the antenna plate

using your finger, this may result in injury.

e Connect the FFC (Flexible Flat Cable) of the

UX-910 to J2 on the MAIN unit, DC power cable to
the power connector (W305) from the PA unit and
the coaxial cable to the J541 on the PLL unit.

CAUTION
NEVER catch the cables from the optional DSP

unit(s) between chassis and the UX-910, this
may damage the DSP unit(s) and/or transceiver.

r Place the UX-910 using the supplied 4 screws.

BE CAREFUL not to drop the supplied screws
inside the transceiver.

t Return the bottom cover to its original position.

73

11

CR-293 soldering

points

Original crystal soldering point

J501

Original crystal

CR-293

J1051

Flexible flat cable

Unsolder the
original
crystal.

PLL shield
cover

J40

P551

2Lo Freq.
check point
(60.400000 MHz)

PA unit

OPTION INSTALLATIONS

■ CR-293

HIGH STABILITY CRYSTAL UNIT

By installing the CR-293, the total frequency stability
of the transceiver will be improved.

q Remove the bottom cover as shown in the diagram

on p. 71.

• Remove the UX-910 if you have installed it. (p. 73)

w Remove the 6 screws from the PLL shield cover,

then lift up the PLL shield cover.

e Disconnect the FFC (Flexible Flat Cable) from the

DISPLAY unit and the connection cable connectors
from J501 and J1051 on the MAIN unit.

r Remove the 5 screws from the PLL unit, then lift up

the PLL unit.

t Unsolder the original reference crystal, then remove

it.

•The original reference crystal unit is soldered at both the
top and bottom sides of the PCB (Printed Circuit Board).

y Install the CR-293 and solder the leads.
u Return the PLL unit, PLL shield cover and bottom

cover to their original positions.

74

DD

Adjust the CR-293

The CR-293 has 0.5 ppm accuracy as the default,
therefore normally you do not need any adjustment
after installing the optional high stability crystal unit.

q Remove the top cover and PA unit cover as shown

in the diagram on p. 71, if required.

w Remove P551 from J40 on the PA unit.
e Connect a frequency counter to check point P551

as shown at left.

r Turn the trimmer capacitor of CR-293 to adjust to

60.400000 MHz.

t Return the top cover and PA unit cover to their orig-

inal positions.

NOTE: CR-293 is a very delicate device, use the ap­propriate tools only for adjustment.

OPTION INSTALLATIONS

(MAIN)

(SUB)

FL-132
(MAIN)

FL-133
(SUB)

J1351

J1301

J1101

Main unit

Slide the MAIN unit to the
front panel side, then lift it up
as the arrow.

Flat canbles

Clips

J51

J651

Red

Gray

J501

J1051

MAIN unit

PLL unit

11

■ FL-132/FL-133

CW NARROW FILTER

The IC-910H has a CW narrow mode to provide bet­ter S/N (Signal-to-Noise), or to reject interference. To
operate the CW narrow mode, an optional CW narrow
filter is necessary.

NOTE: For CW narrow mode during satellite opera­tion, the FL-133 (for SUB band filter) is necessary
since the SUB band circuit is used for receiving, al­though the MAIN band display shows receive fre­quency.

FILTER

Built-in filter 2.3 kHz 4.2 kHz

FL-132/133 500 Hz 1.34 kHz

Passband width

at –6 dB at –60 dB

q Remove the bottom cover as shown in the diagram

on p. 71.

• Remove the UX-910 if you have installed it. (p. 73)

•Disconnect the cables and flat cables when you have in-

stalled the UT-106. (p. 73)

w Disconnect the connection cable connectors from

J51, J501, J651 and J1051 on the MAIN unit.

e Remove the 2 clips and the 6 screws from the

MAIN unit.

t Install FL-132 or FL-133 to the specified position on

the MAIN unit.

y Solder then cut the leads, keeping 2–3 mm (1⁄8″) of

the leads from the bottom of the MAIN unit.

WARNING!
BE CAREFUL not to pinch your finger with the

clip.

r Dis connect the flat cable connectors from J1101,

J1301 and J1351 on the MAIN unit, then lift up the
MAIN unit as below.

u Return the MAIN unit and clips to their original posi-

tions.

i Re-connect the connection cable connector to J51,

J501, J651 and J1051 on the MAIN unit.

o Re-connect the flat cable connector to J1101, J1301

and J1351 on the MAIN unit.

• Return the UX-910 if you have removed it. (p. 73)

•Re-connect the cables and flat cables for UT-106 when

you have disconnected them. (p. 73)

!0 Return the bottom cover to the original position.

75

11

MAINTENANCE

■ Troubleshooting

76

The following chart is designed to help you correct
problems which are not equipment malfunctions.

PROBLEM POSSIBLE CAUSE SOLUTION REF.

Power does not come on
when [POWER] is pushed.

POWER

No sounds comes from
the speaker.

Sensitivity is low.

RECEIVE

Received audio is dis­torted.

Transmitting is impossible.

Output power is too low.

No contact possible with
another station.

Transmitted signals are

TRANSMIT

distorted.

Repeater cannot be ac­cessed.

Programmed scan does
not start.

Memory scan does not
start.

SCAN

Mode select scan does not
start.

No announcement when
[SPCH] is pushed.

SPEECH

The displayed frequency
does not change properly.

DISPLAY

• DC power cable is improperly connected.

• Fuse is blown.

• Volume level is too low.

• The squelch is closed.

• The transceiver is in the transmitting condition.

• The antenna is not connected properly.

• The attenuator is activated.

• The S-meter squelch is activated.

• Incorrect sideband (USB/LSB) is selected.

• Receiving an FM signal.

• Noise blanker is activated.

• Noise reduction is activated.

• PTT lock function is activated.

• [RF PWR] is set too far counterclockwise.

• [MIC GAIN] is set too far counterclockwise.

•Split frequency operation or duplex operation is

activated.

• RIT function is activated.

• [MIC GAIN] to far clockwise.

• Duplex operation is not activated.

•No subaudible tone or incorrect tone frequency

is selected.

• VFO mode is not selected.

•[RF/SQL] is assigned to RF gain and squelch is

opened.

• Memory mode is not selected.

• No memory channels are programmed.

• Mode select scan mode has not been selected.

•Only one channel is programmed with the se-

lected operating mode.

•The voice synthesizer unit has not been in­stalled.

• The announcement level is set to “0” or too low.

• The announcement language is set to “oFF.”

• The dial lock function is activated.

• The internal CPU has malfunctioned.

If you are unable to locate the cause of a problem or
solve it through the use of this chart, contact your near­est Icom Dealer or Service Center.

• Reconnect the DC power cable correctly.

•Check the cause, then replace the fuse with a

spare one. (Fuses are installed in the DC power
cable and the internal PA unit.)

•Rotate [AF] clockwise to obtain a suitable listen­ing level.

•Rotate [RF/SQL] to 12 o’clock position to open
the squelch.

•Push [TRANSMIT] to receive or check the SEND
line of an external unit, if desired.

• Reconnect to the antenna connector.

• Push [ATT] to turn the attenuator OFF.

•Rotate [RF/SQL] to the position where the noise

just disappears.

•Switch USB and LSB by pushing [SSB/CW] for
1 sec.

• Push [FM] to select FM mode.

•Push [AFC/NB] to turn the noise blanker function

OFF.

•Set the noise reduction level in the NR set mode
for maximum readability using [SET] and
[AFC/NB•NR], or turn OFF the function by push­ing [AFC/NB•NR] for 1 sec.

•Turn the PTT lock function OFF in the TRANSMIT
set mode using [SET] and [TRANSMIT].

• Rotate [RF PWR] clockwise.

• Rotate [MIC GAIN] clockwise.

•Push [SPLIT] momentarily or for 1 sec. to turn the

split or duplex function OFF.

• Push [RIT] to turn the RIT function OFF.

• Set [MIC GAIN] to a suitable level.

•Push [SPLIT•DUP] for 1 sec. to turn duplex oper-

ation ON.

•Push [TONE] to activate the subaudible tone or
select a suitable tone frequency in the FM set
mode using [SET] and [FM].

• Push [V/M 1] to select VFO mode.

•Reset [RF/SQL] control assignment and set it to

the threshold point.

• Push [V/M 1] to select memory mode.

•Program desired frequencies into memory chan-

nels.

•Push [SPCH•LOCK] for 1 sec. on the desired op­erating mode programmed channel.

•Program more than two channels with the desired
operating mode.

• Install the optional vice synthesizer unit, UT-102.

•Set the announcement level to a suitable level in

the SPCH set mode using [SET] and [SPCH].

•Set the announcement language to “Eng” (or JPn)
in the SPCH set mode using [SET] and [SPCH].

•Push [SPCH•LOCK] to turn the lock function OFF.

• Reset the CPU.

–

p. 77

p. 26

p. 26

pgs.
2, 13

–

p. 29
p. 26

p. 23

p. 23
p. 30

p. 31

p. 66

p. 32
p. 32

p. 37

p. 27

p. 32

p. 34

p. 35

p. 21
p. 26

p. 40
p. 41

p. 47

p. 41

p. 71

p. 69

p. 69

p. 25
p. 77

MAINTENANCE

Circuitry fuse (4 A)

[POWER] [MW 4] [M-CL 5]

11

■ Fuse replacement

If a fuse blows or the transceiver stops functioning, try
to find the source of the problem, and replace the dam­aged fuse with a new, rated fuse.

CAUTION: DISCONNECT the DC power cable

from the transceiver when changing a fuse.

The IC-910H has 2 types of fuses installed for trans­ceiver protection.

• DC power cable fuses ................................ FGB 30 A

• Circuitry fuse ................................................FGB 4 A

CIRCUITRY FUSE REPLACEMENT

The 13.8 V DC from the DC power cable is applied to
all units in the IC-910H, except for the power ampli­fier, through the circuitry fuse. This fuse is installed in
the PA unit.

q Remove the top cover as shown on p. 71.
w Remove the 11 screws from the PA shielding plate,

then remove the plate.

e Replace the circuitry fuse as shown in the diagram

at right.

r Replace the PA shielding plate and top cover.

DC POWER CABLE FUSE REPLACEMENT

30 A fuse

■ CPU resetting

Resetting CLEARS all programmed contents in
memory channels and returns programmed values
in set mode to default values.

When first applying power or when the function
seems to be displaying erroneous information, reset
the CPU as follows:

q Make sure the transceiver power is OFF.
w While pushing [MW 4] and [M-CL 5], push

[POWER] to turn power ON.

• The internal CPU is reset.

•The transceiver displays its initial VFO frequencies

when resetting is complete.

77

CONTROLLER TO IC-910H

FEFEFE 60 E0 Cn Sc Data area FD

Preamble code (fixed)

Transceiver’s default address

Controller’s default address

Command number

(see table at right)

Sub command number

(see table at right)

BCD code data for frequency or

memory number entry

End of message code (fixed)

OK MESSAGE TO CONTROLLER

FE FE E0 60 FB FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

OK code (fixed)

End of message code (fixed)

NG MESSAGE TO CONTROLLER

FE FE E0 60 FA FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

NG code (fixed)

End of message code (fixed)

IC-910H TO CONTROLLER

FE E0 60 Cn Sc Data area FD

Preamble code (fixed)

Controller’s default address

Transceiver’s default address

Command number

(see table at right)

Sub command number

(see table at right)

BCD code data for frequency or

memory number entry

End of message code (fixed)

qwert y u

qwert y u

13

9–15
V DC

personal
computer

ct- 17

BC-25
(optional)

IC-910H

mini-plug cable

CONTROL COMMAND

■ Remote jack (CI-V) information

• CI-V connection example

The transceiver can be connected through an optional
CT-17 CI-V LEVEL CONVERTER to a personal computer
equipped with an RS-232C port. The Icom Communi­cations Interface-V (CI-V) controls the following func­tions of the transceiver.

Up to 4 Icom CI-V transceivers or receivers can be
connected to a personal computer equipped with an
RS-232C port. See p. 59 for setting the CI-V condition
using set mode.

• Data format

The CI-V system can be operated using the following
data formats. Data formats differ according to com­mand numbers. A data area or sub command is added
for some commands.

78

CONTROL COMMAND

13

Command

00 —

01

02 —

03 —

04 —

05 —

06

07

08

09 —

0A —

0B —

0C —

0D —

0E

0F 10

10 05

11

Sub command

Same as

command 06

00
01
03
04

—

00
01
A0
B0
D0
D1

—

01–0106*

00
01
D0
D3

00
01

11

12

00
01
02
03
04

06
07
08
09
10

11

00

10, 20, 30

Description

Send frequency data for trans­ceive.

Send mode data for transceive.

Read band edge frequencies.

Read operating frequency data.

Read operating mode data.

Set operating frequency.

Set LSB.
Set USB.
Set CW.
Set FM.

Select VFO mode.

Select VFO A.
Select VFO B.
Equalize VFO A and VFO B.
Switch VFO A and VFO B.
Select MAIN VFO.
Select SUB VFO.

Select memory mode.

Select memory channel.
*1A=0100 1b=0101

2A=0102 2b=0103
3A=0104 3b=0105
Call=0106

Memory write.

Transfer memory contents to
VFO.

Memory clear.

Read duplex offset frequency.

Set duplex offset frequency.

Cancel scan.
Start scan.
Set scan resume OFF.
Set scan resume ON.

Turn the split function OFF.
Turn the split function ON.
Set simplex operation.
Set DUP– operation.
Set DUP+ operation.

Set 1 Hz tuning step.
Set 10 Hz tuning step.
Set 50 Hz tuning step.
Set 100 Hz tuning step.
Set 1 kHz tuning step.
Set 5 kHz tuning step.
Set 6.25 kHz tuning step.
Set 10 kHz tuning step.
Set 12.5 kHz tuning step.
Set 20 kHz tuning step.
Set 25 kHz tuning step.
Set 100 kHz tuning step.

Turn attenuator OFF.
Turn attenuator ON.

Command

Sub command

13

14 09

15

+level data

16 42

19 00

+level data

+level data

1A +level data

+level data

00

01
02

01

02

03

04

06

0A

0B

0C

0E

0F

01

02

02
12
22
40

41

43
44

46
47
4A

00
01
02

03

04

05

06
07

08

Description

Announce all S-meter levels,
displayed frequency and mode.
Announce displayed frequency.
Announce operating mode.

[AF] level setting

128=center; 255=max. CW).

(0=max. CCW;

[RF GAIN] level setting

(0=max. CCW; 255=max. CW)

[SQL] level setting

CCW; 255=max. CW)

.

[IF SHIFT] level setting

CCW; 128=center; 255=max. CW).

.

(0=max.

(0=max.

Set noise reduction level

(0=0%; 255=100%).

Set CW pitch

255=900 Hz)

[RF PWR] level setting

CCW; 128=center; 255=max. CW).

(0=300 Hz;

.

(0=max.

[MIC GAIN] level setting (0=max.

CCW; 128=center; 255=max. CW).

Key speed setting (0=6 wpm;

255=60 wpm)

.

Set mic. compressor level

(0=0%; 255=100%).

Set break-in delay

255=13.0 sec.).

Read squelch condition

or closed).

(0=2.0 sec;

(open

Read S-meter level.

Set pre-amp
Set AGC

(0=OFF; 1=ON).

(0=Slow; 1=Fast).

Set noise blanker (0=OFF; 1=ON).
Set noise reduction level

(0=OFF; 1–15=ON)

.

Set auto notch filter

(0=OFF; 1=ON).

Set subaudible tone

(0=OFF; 1=ON)

.
Set tone squelch (0=OFF; 1=ON).
Set mic. compressor

(0=OFF; 1=ON).

Set VOX (0=OFF; 1=ON).
Set break-in

(0=OFF; 1=ON).

Set AFC (0=OFF; 1=ON).

Read the transceiver ID.

Read/write memory channel.
Set satellite memory.
Set VOX gain level

(0=0%; 255=100%).

Set VOX delay

(0=0 sec.; 20=2.0 sec.).

Set anti-VOX

(0=0%; 255=100%).

Attenuation level setting

(0=0%; 255=100%)

.
Set RIT (0=OFF; 1=ON; 2=Sub dial).
Set satellite mode

(0=OFF; 1=ON).

Set simple bandscope

(0=OFF; 1=ON).

79

14

SPECIFICATIONS

80

• General

• Frequency coverage : (Unit: MHz)

Version

U.S.A.

Europe 144.0–146.0 430.0–440.0

Australia

Sweden

Italy 144.0–146.0

1

*

Optional UX-910

2

*

Guaranteed range is 144.0–148.0 MHz.

3

*

Guaranteed range is 430.0–450.0 MHz.

4

*

Guaranteed range is 1240.0–1300.0 MHz.

144 MHz 430(440) MHz 1200 MHz*

Tx: 144.0–148.0 Tx: 430.0–450.0 Tx: 1240.0–1300.0

Rx: 136.0–174.0*2Rx: 420.0–480.0*3Rx: 1240.0–1320.0*

144.0–148.0 430.0–450.0

144.0–146.0 432.0–438.0

430.0–434.0

435.0–438.0

1240.0–1300.0

1240.0–1300.0

1240.0–1300.0

1240.0–1245.0

1270.0–1298.0

1

• Mode : USB, LSB, CW, FM, FM-N*

*Not available in 1200 MHz

• No. of memory Ch. : 212 (99 regular, 6 scan edges, 1

calls for each band)

plus 10

satellite memories)

• Antenna connector : SO-239 (50 Ω; VHF)
Type-N

(50 Ω; UHF)

• Usable temp. range : –10˚C to +60˚C;
+14˚F to +140˚F

• Frequency stability : Less than ±3 ppm

(–10 to 60˚C; +14 to +140˚F)

• Frequency resolution : 1 Hz minimum

• Power supply : 13.8 V DC ±15%

(negative ground)

• Current drain

(at 13.8 V DC; approx.)

:
Transmit Max. power 23.0 A
Receive Standby 2.0 A

(3.0 A; UX-910)

Max. audio 2.5 A (3.5 A; UX-910)

• Dimensions : 241(W) × 94(H)× 239(D) mm

(projections not included) 9

1

⁄2(W) × 311⁄16(H) × 913⁄32(D) in

• Weight (approx.) : 4.5 kg; 10 lb

(5.35 kg; 11 lb 13 oz w/UX-910)

• ACC 1 connector : 8-pin DIN connector

• CI-V connector : 2-conductor 3.5 (d) mm (1⁄8″)

• DATA connectors : 6-pin mini DIN × 2

(for MAIN and SUB)

• Transmitter

• Output power (continuously adjustable):
144 MHz 5–100 W
430(440) MHz 5–75 W
1200 MHz 1–10 W (optional UX-910)

• Modulation system :
SSB Balanced modulation
FM

• Spurious emission :
144/430(440) MHz More than 60 dB
1200 MHz More than 50 dB

• Carrier suppression : More than 40 dB

•Unwanted sideband : More than 40 dB

suppression

•

Microphone connector

• KEY connector : 3-conductor 3.5(d) mm (1⁄4″)

Variable reactance modulation

: 8-pin connector (600 Ω)

• Receiver

• Receive system :
VHF SSB, CW

FM

4

UHF SSB, CW

FM Triple conversion superheterodyne

• Intermediate frequencies:

1st 2nd 3rd 1st 2nd 3rd

SSB

10.8500

CW

10.8491

10.8500

FM

144 MHz

SSB

71.2500 10.8500

CW

71.2491 10.8491

71.2500 10.8500

FM

430(440) MHz

243.8500

SSB

CW

243.8491

FM

243.8500

1200 MHz

• Sensitivity :

SSB, CW (10 dB S/N) Less than 0.11 µV
FM (12 dB SINAD) Less than 0.18 µV

• Squelch sensitivity (threshold):

SSB, CW Less than 1.0 µV
FM Less than 0.18 µV

• Selectivity :

SSB, CW More than 2.3 kHz/–6 dB

FM More than 15.0 kHz/–6 dB

FM-N More than 6.0 kHz/–6 dB

CW-N More than 0.5 kHz/–6 dB

(w/FL-132 or FL-133) Less than 1.34 kHz/–60 dB*

• Spurious and image rejection ratio:

144/430(440) MHz More than 60 dB
1200 MHz More than 50 dB

• AF output power : More than 2.0 W at 10%

(at 13.8 V DC) distortion with an 8 Ω load

• RIT variable range :

144/430(440) MHz ±1.0 kHz (SSB, CW)

1200 MHz ±2.0 kHz (SSB, CW)

•

IF SHIFT variable range

• PHONES connector : 3-conductor 6.35(d) mm (1⁄4″)

• Ext. SP connectors : 2-conductor 3.5 (d) mm (1⁄8″)

All stated specifications are typical and subject to
change without notice or obligation.

Single conversion superheterodyne
Double conversion superheterodyne
Double conversion superheterodyne

(Unit: MHz)

MAIN BAND SUB BAND

——

——

0.455 —

10.8500

10.8491

10.8500

—

—

0.455

—

—

0.455

10.9500

10.9491

10.9500

71.3500 10.9500

71.3491 10.9491

71.3500 10.9500

243.9500

243.9491

243.9500

——

——

0.455 —

10.9500

10.9491

10.9500

Less than 4.2 kHz/–60 dB*

Less than 30.0 kHz/–60 dB*

Less than 18.0 kHz/–36 dB

*Except 1200 MHz band

±5.0 kHz (FM)

±10.0 kHz (FM)

: More than ±1.2 kHz

/8 Ω×2 (for MAIN and SUB)

—

—

0.455

—

—

0.455

OPTIONS

15

CR-293 HIGH STABILITY

CRYSTAL UNIT

Frequency stability: ±0.5 ppm

(0˚C to +60˚C)

SP-21 EXTERNAL SPEAKER

FL-132 (for MAIN band)
FL-133 (for SUB band and satellite

operation)

CW NARROW FILTERS

Have good shape factor and provide
better CW reception during crowded
band conditions. 500 Hz/–6dB

SM-20 DESKTOP MICROPHONE

HM-12 HAND MICROPHONE

Hand microphone equipped with
[UP]/[DOWN] switches. Same as that
supplied with the transceiver.

UT-106 DSP UNIT

Designed for base station operation.

• Input impedance: 8 Ω

• Max. input power: 5 W

UX-910 1200 MHz BAND UNIT

Allows you additional all mode opera­tion on the 1200 MHz band.

Unidirectional, electret microphone for
base station operation. Includes [UP]
and [DOWN] switches and a low cut
function.

MB-23 CARRYING HANDLE

Carrying handle, convenient for
portable operation.

AG-25 (for 144 MHz band), AG-35 (for 430(440) MHz band),
AG-1200 (for 1200 MHz band)

WEATHER-PROOF PREAMPLIFIERS

External all-weather, mast mounting preamplifiers for com­pensating for coaxial cable loss.

IC-MB5 MOBILE MOUNTING BRACKET

Transceiver mounting bracket for mobile operation.

SP-7 EXTERNAL SPEAKER

Compact speaker for base station operation.

Allows AF DSP capabilities, including
noise reduction and auto notch filter.

CT-17 CI-V LEVEL CONVERTER

For remote transceiver control using a
personal computer. You can change
frequencies, operating mode, memory
channels, etc.

UT-102 VOICE SYNTHESIZER UNIT

Announces the receive frequency, mode and S-meter level in
a clear, electronically-generated voice, in English

(or Japanese).

AG-2400 DOWN CONVERTER UNIT

All-weather, satellite down converter with superior NF and
gain.
Input freq.: 2400–2402 MHz, Output freq. : 144–146 MHz
Conversion gain: More than 25 dB
Total NF: Less than 1.5 dB

81

16

INSTALLATION NOTES

For amateur base station installations it is recom­mended that the forwards clearance in front of the an­tenna array is calculated relative to the EIRP (Effective
Isotropic Radiated Power). The clearance height below
the antenna array can be determined in most cases
from the RF power at the antenna input terminals.

As different exposure limits have been recommended
for different frequencies, a relative table shows a
guideline for installation considerations.

Below 30 MHz, the recommended limits are specified
in terms of V/m or A/m fields as they are likely to fall
within the near-field region. Similarly, the antennae
may be physically short in terms of electrical length
and that the installation will require some antenna
matching device which can create local, high intensity
magnetic fields. Analysis of such MF installations is
best considered in association with published guidance
notes such as the FCC OET Bulletin 65 Edition 97-01
and its annexes relative to amateur transmitter instal­lations. The EC recommended limits are almost identi­cal to the FCC specified ‘uncontrolled’ limits and tables
exist that show pre-calculated safe distances for differ­ent antenna types for different frequency bands. Fur­ther information can be found at http://www.arrl.org/.

Forward clearance, EIRP by frequency band

Watts 10–2 m 70 cm 23 cm 13 cm and above

100 2 m 2 m 1.1 m 0.7 m

1000 6.5 m 6 m 3.5 m 3 m

10,000 20 m 18 m 11 m 7 m

100,000 65 m 60 m 35 m 29 m

In all cases any possible risk depends on the transmit­ter being activated for long periods. (actual recom­mendation limits are specified as an average during 6
minutes) Normally the transmitter is not active for long
periods of time. Some radio licenses will require that a
timer circuit automatically cuts the transmitter after 1–2
minutes etc.

Similarly some types of transmitter, SSB, CW, AM etc.
have a lower ‘average’ output power and the assessed
risk is even lower.

Versions of the IC-910H which display the “CE”
symbol on the serial number seal, comply with
the essential requirements of the European
Radio and Telecommunication Terminal Direc­tive 1999/5/EC.

• Typical amateur radio installation

Exposure distance assumes that the predominant ra­diation pattern is forwards and that radiation vertically
downwards is at unity gain (sidelobe suppression is
equal to main lobe gain). This is true of almost every
gain antenna today. Exposed persons are assumed to
be beneath the antenna array and have a typical
height to 1.8 m.

The figures assume the worst case emission of con­stant carrier.

For the bands 10 MHz and higher the following power
density limits have been recommended:

10–400 MHz 2 W/sq m

435 MHz 2.2 W/sq m

1296 MHz 6.5 W/sq m

EIRP Clearance heights by frequency band

Watts 10–2 m 70 cm 23 cm 13 cm and above

1 2.1 m 2 m 2 m 2 m
10 2.8 m 2.7 m 2.5 m 2.3 m
25 3.4 m 3.3 m 2.7 m 2.5 m

100 5 m 4.7 m 3.6 m 3.2 m

1000 12 m 11.5 m 7.3 m 6.3 m

This warning symbol indicates that this equip­ment operates in non-harmonised frequency
bands and/or may be subject to licensing con­ditions in the country of use. Be sure to check
that you have the correct version of this radio or
the correct programming of this radio, to com­ply with national licensing requirement.

82

INSTALLATION NOTES

DECLARATION

OF CONFORMITY

We Icom Inc. Japan

1-1-32 Kamiminami, Hirano-ku,
Osaka 547-0003 Japan

Kind of equipment:

VHF/UHF ALL MODE TRANSCEIVER

This compliances is based on conformity according to Annex III of the
directive 1999/5/EC using the following harmonised standards:
i) Article 3.1a EN 60950 +A11
ii) Article 3.1b EN 301489-1 and EN 301489-15 (or ETS 300 684)
iii) Article 3.2 EN 301 783-2
iv)
v)

Type-designation:

i910H

Signature

Authorized representative name

Place and date of issue

T. Aoki
General Manager

Icom (Europe) GmbH

Himmelgeister straße 100
D-40225 Düsseldorf

Düsseldorf 21th Feb. 2001

Icom (Europe) GmbH

Declare on our sole responsibility that this equipment complies the
essential requirements of the Radio and Telecommunications Terminal
Equipment Directive, 1999/5/CE, and that any applicable Essential Test
Suite measurements have been performed.

Version (where applicable):

Version 144 MHz 430 MHz 1200 MHz*

Europe (#02) 144.0–146.0 430.0–440.0 1240.0–1300.0

Sweden (#05) 144.0–146.0 432.0–438.0 1240.0–1300.0

Italy (#08) 144.0–146.0

430.0–434.0

435.0–438.0

1240.0–1245.0

1270.0–1298.0

16

Version and frequency coverage

* Optional UX-910

•About AG-25, AG-35 and AG-1200 preamplifiers

The use of IC-910H (#02, #05, #08) in combination with AG-25, AG-35
and/or AG-1200 preamplifiers do not comply with the European Har­monised Standard regulations. Please do not use the IC-910H with these
preamplifiers (AG-25, AG-35 and/or AG-1200) intended for the US, Asian,
Oceanian and African markets.

83

Count on us!

■ GER

■ AUT

■ GBR

■ IRL

■ FRA

■ NED

■ BEL

■ LUX

■ ESP

■ POR

■ ITA

■ GRE

■ SWE

■ DEN

■ FIN

< Intended Country of Use >

■ GER

■ AUT

■ GBR

■ IRL

■ FRA

■ NED

■ BEL

■ LUX

■ ESP

■ POR

■ ITA

■ GRE

■ SWE

■ DEN

■ FIN

< Intended Country of Use >

■ GER

■ AUT

■ GBR

■ IRL

■ FRA

■ NED

■ BEL

■ LUX

■ ESP

■ POR

■ ITA

■ GRE

■ SWE

■ DEN

■ FIN

< Intended Country of Use >

IC-910H
#05 (Sweden)

IC-910H
#02 (Europe)

IC-910H
#08 (Italy)

A-5699H-1EX-y
Printed in Japan
© 2000-2002 Icom Inc.

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan