Icom IC-2725E User Manual

INSTRUCTION MANUAL

DUAL BAND FM TRANSCEIVER

i2 725E

FOREWORD

IMPORTANT

Thank you for purchasing this Icom product. The IC-2725E

VHF/UHF FM TRANSCEIVER

perior technology and craftsmanship. With proper care, this
product should provide you with years of trouble-free opera­tion.

We want to take a couple of moments of your time to thank
you for making your IC-2725E your radio of choice, and hope
you agree with Icom’s philosophy of “technology first.” Many
hours of research and development went into the design of
your IC-2725E.

DD

FEATURES

is designed and built with Icom’s su-

❍ V/V, U/U simultaneous receive capability
❍ Independent controls for each left and right

bands

❍ Separate controller for flexible installation
❍ 50 W* of high transmit output power

*VHF band; 35 W for UHF

❍ Remote control microphone standard
❍ New DMS (Dynamic Memory Scan) system

i

READ ALL INSTRUCTIONS carefully and completely

before using the transceiver.

SAVE THIS INSTRUCTION MANUAL— This in-

struction manual contains important operating instructions for
the IC-2725E.

EXPLICIT DEFINITIONS

WORD DEFINITION

R WARNING!

CAUTION

NOTE

Icom, Icom Inc. and the logo are registered trademarks of Icom
Incorporated (Japan) in the United States, the United Kingdom, Ger­many, France, Spain, Russia and/or other countries.

Personal injury, fire hazard or electric shock
may occur.

Equipment damage may occur.

Recommended for optimum use. No risk of
personal injury, fire or electric shock.

PRECAUTION

RWARNING RF EXPOSURE! This device emits Radio

Frequency (RF) energy. Extreme caution should be observed when
operating this device. If you have any questions regarding RF expo­sure and safety standards please refer to the Federal Communica­tions Commission Office of Engineering and Technology’s report on
Evaluating Compliance with FCC Guidelines for Human Radio fre­quency Electromagnetic Fields (OET Bulletin 65).

RWARNING! NEVER connect the transceiver to an AC out-

let. This may pose a fire hazard or result in an electric shock.

RWARNING! NEVER operate the transceiver while driving a

vehicle. Safe driving requires your full attention—anything less may
result in an accident.

NEVER connect the transceiver to a power source of more than

16 V DC. This will damage the transceiver.

NEVER connect the transceiver to a power source using reverse

polarity. This will damage the transceiver.

NEVER cut the DC power cable between the DC plug and fuse

holder. If an incorrect connection is made after cutting, the transceiver
may be damaged.

NEVER expose the transceiver to rain, snow or any liquids. The

transceiver may be damaged.

NEVER operate or touch the transceiver with wet hands. This may

result in an electric shock or damage the transceiver.

NEVER place the transceiver where normal operation of the vehi-

cle may be hindered or where it could cause bodily injury.

NEVER let objects impede the operation of the cooling fan on the

rear panel.

DO NOT push the PTT when not actually desiring to transmit.
DO NOT allow children to play with any radio equipment contain-

ing a transmitter.
During mobile operation, DO NOT operate the transceiver with-

out running the vehicle’s engine. When the transceiver’s power is ON
and your vehicle’s engine is OFF, the vehicle’s battery will soon be­come exhausted.

AVOID using or placing the transceiver in direct sunlight or in

areas with temperatures below –10°C or above +60°C.

BE CAREFUL! The transceiver will become hot when operat-

ing it continuously for long periods.

AVOID setting the transceiver in a place without adequate venti-

lation. Heat dissipation may be affected, and the transceiver may be
damaged.

AVOID the use of chemical agents such as benzine or alcohol

when cleaning, as they can damage the transceiver’s surfaces.

USE Icom microphones only (supplied or optional). Other manu-

facturer’s microphones have different pin assignments and may dam­age the transceiver if attached.

IMPORTANT!

Detailed installation notes for Icom mobile transceivers to
be fitted into vehicles are available. Contact your Icom
dealer or distributor.

ii

q DC power cable (3 m) ………………………………………1

qw e

r

ty

uio

w Mobile mounting bracket …………………………………1
e Microphone (HM-133)* ……………………………………1
r Fuse (20 A) …………………………………………………1
t Mounting screws, nuts and washers …………………1 set
y Microphone hanger …………………………………………1
u Remote controller bracket (MB-85) ………………………1
i Mounting screws and washers for MB-85 ……………1 set
o Separation cable (20 cm) …………………………………1

*HM-118N

supplied versions are also available.

HAND MICROPHONE

or HM-118TN/TAN

DTMF MICROPHONE

iii

TABLE OF CONTENTSSUPPLIED ACCESSORIES

FOREWORD ........................................................................................... i

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

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

PRECAUTION ........................................................................................ ii

SUPPLIED ACCESSORIES .................................................................. iii

TABLE OF CONTENTS ......................................................................... iii

QUICK REFERENCE GUIDE ........................................................... I–XII

■ Installation ....................................................................................... I

■ Your first contact ......................................................................... VIII

■ Repeater operation ........................................................................ X

■ Programming memory channels.................................................... XI

1 PANEL DESCRIPTION ............................................................... 1–10

■ Front panel— controller ................................................................. 1

■ Function display ............................................................................. 3

■ Main unit ........................................................................................ 5

■ Microphone (HM-133) .................................................................... 7

■ Microphone keypad ........................................................................ 8

■ Optional microphones (HM-118N/TN)........................................... 10

2 SETTING A FREQUENCY ........................................................ 11–15

■ Preparation ................................................................................... 11

■ Using the tuning dial .................................................................... 13

■ Using the [Y]/[Z] keys ................................................................. 13

■ Using the keypad ......................................................................... 13

■ Tuning step selection ................................................................... 14

■ Lock functions .............................................................................. 15

3 BASIC OPERATION ................................................................. 16–21

■ Receiving ..................................................................................... 16

■ Monitor function ........................................................................... 16

■ Squelch attenuator ....................................................................... 17

■ V/V, U/U simultaneous receive (Para-watch) ............................... 18

■ Sub band mute/sub band busy beep ........................................... 19

■ Transmitting ................................................................................. 20

1

■ Selecting output power ................................................................ 20

■ One-touch PTT function ............................................................... 21

■ Audio mute function ..................................................................... 21

4 REPEATER OPERATION ......................................................... 22–28

■ General ........................................................................................ 22

■ Accessing a repeater ................................................................... 23

■ Subaudible tones ......................................................................... 25

■ Offset frequency .......................................................................... 27

5 MEMORY OPERATION ............................................................ 28–36

■ General description ...................................................................... 28

■ Memory channel selection ........................................................... 28

■ Programming a memory channel ................................................. 29

■ Transferring memory contents ..................................................... 31

■ Memory clearing .......................................................................... 33

■ Memory bank selection ................................................................ 34

■ Memory bank setting .................................................................... 35

■ Transferring bank contents .......................................................... 36

6 CALL CHANNEL OPERATION ................................................ 37–38

■ Call channel selection .................................................................. 37

■ Call channel transferring .............................................................. 37

■ Programming a call channel ........................................................ 38

7 SCAN OPERATION .................................................................. 39–44

■ Scan types ................................................................................... 39

■ Scan start/stop ............................................................................. 40

■ Scan edges programming ............................................................ 41

■ Skip channel setting ..................................................................... 43

■ Scan resume condition ................................................................ 44

8 PRIORITY WATCH .................................................................... 45–46

■ Priority watch types ...................................................................... 45

■ Priority watch operation ............................................................... 46

9 DTMF MEMORY ENCODER ..................................................... 47–50

■ Programming a DTMF code ......................................................... 47

■ Transmitting a DTMF code .......................................................... 49

■ DTMF speed ................................................................................ 50

10 POCKET BEEP AND TONE SQUELCH ................................... 51–54

■ Pocket beep operation ................................................................. 51

■ Tone/DTCS squelch operation ..................................................... 53

■ Tone scan ..................................................................................... 54

11 OTHER FUNCTIONS ................................................................ 55–70

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

■ Initial set mode ............................................................................. 59

■ AM/FM narrow mode ................................................................... 63

■ Microphone keys .......................................................................... 64

■ Partial reset .................................................................................. 65

■ All reset ........................................................................................ 65

■ Data cloning ................................................................................. 66

■ Packet operation .......................................................................... 67

12 MAINTENANCE ........................................................................ 71–72

■ Troubleshooting ........................................................................... 71

■ Fuse replacement ........................................................................ 72

13 SPECIFICATIONS AND OPTIONS ........................................... 73–74

■ Specifications ............................................................................... 73

■ Options ......................................................................................... 74

14 MODE ARRANGEMENT ........................................................... 75–76

15 CE .................................................................................................... 77

2
3
4
5
6
7
8
9
10
11
12
13
14
15

iv

QUICK REFERENCE GUIDE

Main body

Front panel

■ Installation

D Installation methods

• Single body installation

Transceiver

• Remote installation

• The supplied MB-85

COMBINATION BRACKET

is used to mount
the controller to the main unit. (Use the supplied 20 cm sep­aration cable.)

• The supplied mounting bracket (or optional MB-17A) can be
used for the main unit installation.

I

• Optional MB-84
1155

SEPARATION CABLE

• Optional OPC-1156

REMOTE CONTROLLER BRACKET

can be used for installation.

SEPARATION CABLE

(3.5 m) is available

for extend the separation cable.

• Optional MB-65

MOUNTING BASE

is available for increasing

front panel mounting possibilities.

• Optional OPC-440

MICROPHONE CABLE

(5.0 m) and OPC-647

(2.5 m) are available to extend the microphone cable.

• Optional OPC-441

SPEAKER CABLE

(5.0 m) is available to ex-

tend the speaker cable.

and OPC-

QUICK REFERENCE GUIDE

25˚

Nut

Spring washer

When using
self-tapping
screws

Flat washer

Mounting nut

Mounting
bracket

Controller

Main unit

Main unit

Main unit

D Location

Select a location which can support the weight of the trans­ceiver and does not interfere with driving. We recommend the
locations shown in the diagram below.

NEVER place the transceiver or remote controller where nor­mal operation of the vehicle may be hindered or where it
could cause bodily injury.

NEVER place the transceiver or remote controller where air
bag deployment may be obstructed.

DO NOT place the transceiver or remote controller where hot
or cold air blows directly onto it.

AVOID placing the transceiver or remote controller in direct
sunlight.

D Using the mounting bracket

qDrill 4 holes where the mounting bracket is to be installed.

• Approx. 5.5–6 mm when using nuts; approx. 2–3 mm when using
self-tapping screws.

wInsert the supplied screws, nuts and washers through the

mounting bracket and tighten.

eAdjust the angle for your suitable position.

Quick reference guide

IMPORTANT!

Detailed installation notes for Icom mobile transceivers to
be fitted into vehicles are available. Contact your Icom
dealer or distributor.

II

QUICK REFERENCE GUIDE

D MB-85 installation

When using the supplied MB-85 (
can install the control head of the IC-2725E in one of 2 meth­ods. A 20 cm remote control cable is supplied for connection,
and connect the cable before attaching the bracket to the
main unit is recommended.

COMBINATION BRACKET

), you

• Example 1

III

• Example 2

D Optional MB-84 installation

MB-84

Optional

MB-65

Adjust the view­ing angle for
maximum visibili­ty of the function
display.

MB-84

MB-84

• Over-head mounting

• Standard mounting

Remote
controller

Supplied
screws

Supplied
screws

Self-tapping
screws

Remote
controller

Nut

Spring

washer

Flat
washer

The optional MB-84
separate installation.

REMOTE CONTROLLER BRACKET

QUICK REFERENCE GUIDE

is used for

qDrill 2 holes where the bracket is to be installed.

• Approx. 4 mm when using nuts; approx. 1–2 mm when using
self-tapping screws.

wAttach the remote controller to the MB-84 and tighten the

controller using with the supplied screws.

eTighten the controller with bracket.

• Using the optional MB-65

Quick reference guide

IV

Controller

Main unit

Ferrite core

Controller

Main unit

QUICK REFERENCE GUIDE

D Separation cable connection

A separation cable (20 cm) is supplied with the IC-2725E.

Connect the controller and the main unit using with the sepa­ration cable as follows.

IMPORTANT!— When using the optional OPC-1155

A ferrite core is supplied within the OPC-1155. Connect the
cable connector with the ferrite core into the main unit [CON­TROLLER] socket as below.

D Microphone connection

Two microphone connectors are available for the IC-2725E—
one is on the controller side panel, and another is on the main
unit front panel.

Connect the supplied microphone to either the desired con­nector as illustrated below.

V

QUICK REFERENCE GUIDE

DC power
supply 13.8 V

to an
AC
outlet

Fuses
20 A

black
red⊕

−

⊕

−

IC-2725E

IC-2725E

Fuses
20 A

black

red⊕

−

12 V

Grommet

NOTE:

Use terminals for the
cable connections.

WARNING!

NEVER
remove the
fuse holders.

Crimp

Solder

12 V
battery

Supplied
DC power cable

+ red

_ black

D Battery connection

☞ RWARNING NEVER remove the fuse holders from the

DC power cable.

☞ NEVER connect the transceiver directly to a 24 V battery.
☞ DO NOT use the cigarette lighter socket for power con-

nections. (See p. 6 for details)
Attach a rubber grommet when passing the DC power cable
through a metal plate to prevent a short circuit.

• CONNECTING TO A DC POWER SOURCE

D DC power supply connection

Use a 13.8 V DC power supply with at least 15 A capacity.

Make sure the ground terminal of the DC power supply is
grounded.

• CONNECTING TO A DC POWER SUPPLY

Quick reference guide

See p. 72 for fuse replacement.

VI

QUICK REFERENCE GUIDE

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft
solder

Coupling ring

To antenna

Roof-mount antenna
(Drill a hole or use a magnetic mount.)

Gutter-mount antenna

Trunk-mount
antenna

D Antenna installation

• Antenna location

To obtain maximum performance from the transceiver, select
a high-quality antenna and mount it in a good location. A non­radial antenna should be used when using a magnetic mount.

• Antenna connector

The antenna uses a PL-259 connector.

• PL-259 CONNECTOR

q Slide the coupling ring

down. Strip the cable
jacket and soft solder.

w Strip the cable as shown

at left. Soft solder the cen­ter conductor.

e Slide the connector body

on and solder it.

r Screw the coupling ring

onto the connector body.

NOTE: There are many publications covering proper an­tennas and their installation. Check with your local dealer
for more information and recommendations.

VII

QUICK REFERENCE GUIDE

MAIN

T X

MAIN

T X

M

M

MAIN

T X

MAIN

T X

M

M

Push

Push again
Push the desired band’s
[MAIN•BAND]

[M/CALL•MW]

While pushing both [M/CALL•MW], turn power ON.

[M/CALL•MW]

Set both [VOL] and [SQL] controls to 9–10 o’clock positions.

■ Your first contact

Now that you have your IC-2725E installed in your car or
shack, you are probably excited to get on the air. We would
like to take you through a few basic operation steps to make
your first “On The Air” an enjoyable experience.

1. Turning ON the transceiver

Before powering up your IC-2725E, you may want to make
sure the audio volume and squelch level controls are set in
9–10 o’clock positions.

Although you have purchased a brand new transceiver, some
settings may be changed from the factory defaults because
of the QC process. Resetting the CPU is necessary to start
from factory default.

2. Selecting the main band

The IC-2725E displays 2 frequencies on left and right bands
simultaneously. However, transmission, some switches and
microphone keys operation are accepted for the main band
only.

Quick reference guide

➥ Push the desired band’s (left or right) [MAIN•BAND] to se-

lect the main band.

•“Q” appears for the main band.

Using the HM-133

You can select the main band from the HM-133.

➥ While pushing both band’s [M/CALL•MW], push [PWR] for

1 sec. to reset the CPU.

VIII

QUICK REFERENCE GUIDE

MAIN

T X

MAIN

T X

MAIN

T X

MAIN

T X

[EXAMPLE]: Setting frequency to 145.3625 MHz.

Push

Push

Push

Push

Rotate the desired [DIAL].

MAIN

T X

MAIN

T X

M

M

Frequency band initial is displayed.

Push the desired band’s
[MAIN•BAND] for 1 sec.

[DIAL]

3. Selecting the operating frequency band

The IC-2725E has 2 m and 70 cm bands for each left and
right band. The operating band can be exchanged between
them, and the same bands, V/V and U/U settings are also
possible.

➥ Push the desired band’s (left or right) [MAIN•BAND] for

1 sec. then rotate the appropriate band’s [DIAL].

• Push the [MAIN•BAND] momentarily to return to frequency indi­cation.

4. Tune the frequency

The tuning dial will allow you to dial in the frequency you want
to operate. Pages 13 and 14 will instruct you on how to set
the tuning speed.

Using the HM-133

You can directly enter the frequency with the HM-133 keypad
for the main band.

IX

■ Repeater operation

MAIN

T X

DUP

MAIN

T X

DUP

MAIN

T X

T

Push

Push , then

Push

MAIN

T X

DUP

T

Push [TONE•DTMF].

MAIN

T X

DUP

Push [DUP•MONI].

1. Setting duplex

Push desired band’s [MAIN•BAND] to select the main band.
Push [DUP•MONI] once or twice to select minus duplex or
plus duplex.

2. Repeater tone

Push [TONE•DTMF] several times until “T” appears, if the re­peater requires a subaudible tone to be accessed.

QUICK REFERENCE GUIDE

Using the HM-133

Plus or minus duplex selection and the repeater tone setting
can be made easily via HM-133.
Push [

DUP

– 7(TONE)] for minus duplex; [

for plus duplex selection, push [FUNC] then [
to turn the repeater tone ON.

DUP

+ 8(TSQLS)]

DUP

– 7(TONE)]

Quick reference guide

X

QUICK REFERENCE GUIDE

MAIN

T X

M

Push [M/CALL•MW] for 1 sec.

■ Programming memory channels

The IC-2725E has a total of 212 memory channels (including
10 scan edges and 2 call channels) for storing often used op­erating frequency, repeater settings, etc.
Any memory channel can be recalled from either left or right
band.

1. Setting a frequency

In VFO mode, set the desired operating frequency with re­peater, tone and tuning steps, etc.

➥ Push the desired band’s [V/MHz•SCAN] to select VFO.
➥

Rotate the same band’s [DIAL] to set the desired frequency.

• Set other data, such as repeater tone, duplex information, tuning

step), if desired.

2. Selecting a memory channel

Push the same band’s [M/CALL•MW] for 1 sec., then rotate
the [DIAL] to select the desired memory channel.

•“!” indicator and memory channel number blink.

3. Writing a memory channel

Push and hold the [M/CALL•MW] for 1 sec. to program.

• 3 beeps sound

• Return to VFO mode automatically after the program.

• Memory channel number automatically increases when continuing

to push the [M/CALL•MW] after programming.

XI

Using the HM-133

MAIN

T X

M

Push ,

then

q In VFO mode, set the desired operating frequency, includ-

ing offset direction, tone settings, etc.

➥ Push [VFO/LOCK] to select VFO.
➥ Push [

w Push [FUNC] then [

•“!” indicator and memory channel number blink.

e Push [Y]/[Z] to select the desired memory channel.
r Push [FUNC] then push [

gram.

• 3 beeps sound

• Memory channel number automatically increases when continu-

ing to push [

ENT

C(T-OFF)] first, then enter the desired oper-

ating frequency via the keypad.

• Set other data, such as repeater tone, duplex information,
tuning step, if necessary.

CLR

A(MW)].

CLR

A(MW)] for 1 sec. to pro-

CLR

A(MW)] after programming.

QUICK REFERENCE GUIDE

Quick reference guide

XII

MAIN

BAND

SCAN

MW

V/MHz

M/CALL

MAIN
BAND

SCAN

V/MHz

MW

M/CALL

VOLVOL

DIALDIAL

SQLSQL

DUP
MONI

TONE
DTMF

LOW
PRIO

DUAL BAND

FM TRANSCEIVER

i2725

PWR

SET

BUSY

LOWMID

BUSY

LOWMID

MAIN

T X

DUP

T SQL

DTCS

AM

MAIN

T X

DUP

T

SQL

DTCS

AM

M

SKIP

M

SKIP

q

Function display (pgs. 3, 4)

w

ert

1

PANEL DESCRIPTION

■ Front panel— controller

*The switches w to t are

for the MAIN band only.

qPOWER SWITCH [PWR]

Turns power ON and OFF when pushed for 1 sec.

wSET•LOCK SWITCH [SET• ]

➥ Enters set mode when pushed. (p. 55)
➥ Switches the lock function ON and OFF when pushed

for 1 sec. (p. 15)

eOUTPUT POWER•PRIORITY SWITCH [LOW•PRIO]

➥ Each push changes the output power selection. (p. 20)
➥ Starts priority watch when pushed for 1 sec. (p. 46)

1

rTONE•DTMF SWITCH [TONE•DTMF]

➥ Each push selects a tone function. (pgs. 23, 51)

• Subaudible tone encoder, pocket beep (CTCSS), tone
squelch, pocket beep (DTCS), DTCS squelch or tone func­tion OFF can be selected.

➥ Turns DTMF memory encoder ON and OFF when

pushed for 1 sec. (p. 47)

tDUPLEX•MONITOR SWITCH [DUP•MONI]

➥ Push to select DUP–, DUP+ and simplex operation.

(p. 23)

➥ Push for 1 sec. to switch the monitor function ON and

OFF. (p. 16)

MAIN

BAND

SCAN

MW

V/MHz

M/CALL

MAIN
BAND

SCAN

V/MHz

MW

M/CALL

VOLVOL

DIALDIAL

SQLSQL

DUP
MONI

TONE
DTMF

LOW

PRIO

DUAL BAND

FM TRANSCEIVER

i2725

PWR

SET

o

o

Left band Right band

y

u

i

!0

y

u

i

!0

!1!1

*The same controls for both the left and

right bands are arranged in symmetry.

PANEL DESCRIPTION

1

1

yMAIN•BAND SWITCH [MAIN•BAND]

➥ Push to select the main band. (p. 11)
➥ Enters operating band select condition when pushed for

1 sec. (p. 11)

uVFO/MHz TUNING•SCAN SWITCH [V/MHz•SCAN]

➥ Selects and toggles VFO mode and 1 MHz (or 10 MHz

➥ Starts scan when pushed for 1 sec. (p. 40)

i

MEMORY/CALL•MEMORY WRITE SWITCH [M/CALL•MW]

➥ Push to select and toggle memory and call channel

for some versions) tuning when pushed. (p. 13)

• Cancels a scan when pushed during scan.

modes. (pgs. 12, 28, 37)

➥ Selects a memory channel for programming when

pushed for 1 sec. (pgs. 29, 38, 41)

oVOLUME CONTROL [VOL] (p. 16)

Adjusts the audio level for relative band.

!0TUNING DIAL [DIAL]

Selects the operating frequency (p. 13), memory channel
(p. 28), the setting of the set mode item and the scanning
direction (p. 40) for the relative band.

!1SQUELCH CONTROL [SQL]

Varies the squelch level for relative band. (p. 16)

• The RF attenuator activates and increases the attenuation when
rotated clockwise to the center position and further. (p. 17)

2

1 PANEL DESCRIPTION

BUSY

LOWMID

BUSY

LOWMID

MAIN

T X

DUP

T SQL

DTCS

AM

MAIN

T X

DUP

T

SQL

DTCS

AM

M

SKIP

M

SKIP

qwe r t

y

uio!0!1!2

y

qwe r t

uio!0!1!2

Left band Right band

■ Function display

*The same indications for both the left and right bands are arranged.

qMAIN INDICATOR (p. 11)

Indicate the main band for transmit and function control.

wTRANSMIT INDICATOR

➥ Appears while transmitting. (p. 20)
➥ Blinks while transmitting with the one-touch PTT func-

tion. (p. 21)

eDUPLEX INDICATORS (p. 23)

“DUP” appears when plus duplex, “DUP –” appears when
minus duplex (repeater) operation is selected.

3

rTONE INDICATORS

➥ “T” appears while the subaudible tone encoder is in use.

(p. 23)

➥ “T SQL” appears while the tone squelch function is in

use. (p. 51)

➥ “DTCS” appears while the DTCS squelch function is in

use. (p. 51)

➥ “S” appears with the “T SQL” or “DTCS” indicator

while the pocket beep function
use. (p. 51)

(with CTCSS or DTCS) is in

PANEL DESCRIPTION

1

tAM INDICATOR (p. 63)

Appears when AM mode is selected.

yFREQUENCY READOUT

Shows the operating frequency, set mode contents, etc.

• Frequency decimal point blinks while scanning. (p. 40)

•“d” appears in place of the 1st digit while the DTMF memory

function is in use. (p. 47)

uMEMORY CHANNEL NUMBER INDICATORS

➥ Shows the selected memory channel number. (p. 28)
➥ Shows the selected bank initial. (p. 34)
➥ “C” appears when the call channel is selected. (p. 37)
➥ “L” appears when the lock function is activated. (p. 15)

iSKIP INDICATOR (p. 43)

Appears when the displayed memory channel is specified
as a skip channel.

oMEMORY INDICATOR (pgs. 12, 28)

Appears when memory mode is selected.

!0S/RF INDICATORS

➥ Shows the relative signal strength while receiving sig-

nals. (p. 16)

➥ Shows the output power level while transmitting. (p. 20)

!1OUTPUT POWER INDICATORS

“LOW” appears when low output power; “MID” appears
when middle output power is selected.
No indicator appears when high output power is selected.

!2BUSY INDICATOR

➥ Appears when a signal is being received or the squelch

is open. (p. 16)

➥ Blinks while the monitor function is activated. (p. 16)

1

4

1 PANEL DESCRIPTION

■ Main unit

qwe

qDATA SOCKET [DATA]

Connects a TNC (Terminal Node Controller), etc. for data
communications.

• See p. 6 for connection information.

5

wMICROPHONE CONNECTOR [MIC]

e CONTROLLER CONNECTOR [CONTROLLER] (p. V)

rCOOLING FAN

rtyu

tANTENNA CONNECTOR [ANT]

i

ANTENNA INFORMATION

For radio communications, the antenna is of critical impor­tance, to maximize your output power and receiver sensi­tivity. The transceiver accepts a 50 Ω antenna and less
than 1:1.5 of Voltage Standing Wave Ratio (VSWR). High
SWR values not only may damage the transceiver but also
lead to TVI or BCI problems.

Connects the supplied or an optional microphone.

q +8 V DC output (Max. 10 mA)
w Channel up/down
e 8 V control IN
r PTT

i

Connects the controller unit with the supplied cable.

Rotates while transmitting.
Also rotates while receiving depending on the setting in ini­tial set mode. (p. 60)

Connects a 50 Ω antenna with a PL-259 connector and a
50 Ω coaxial cable.

t GND (microphone ground)

q

y MIC (microphone input)
u GND
i Data IN

PANEL DESCRIPTION

Front panel view

w

y

r

q

e

t

1

yEXTERNAL SPEAKER JACK 1 [SP-1]

Connects an 8 Ω speaker. Outputs both left and right
bands audio when no external speaker is connected to
[SP-2]. See the table below for details.

• Audio output power is more than 2.4 W.

uEXTERNAL SPEAKER JACK 2 [SP-2]

Connects an 8 Ω speaker. Outputs right band’s audio only.

• Audio output power is more than 2.4 W.

iPOWER RECEPTACLE [DC13.8V]

Accepts 13.8 V DC ±15% with the supplied DC power
cable.

☞ NOTE: DO NOT use a cigarette lighter socket as a

power source when operating in a vehicle. The plug
may cause voltage drops and ignition noise may be su­perimposed onto transmit or receive audio.

DD

Speaker information

Connected

speaker

No external

speakers

[SP-1] only External speaker (mixed audio)

[SP-2] only Internal speaker External speaker

2 external External speaker via External speaker via
speakers [SP-1] [SP-2]

Left band audio Right band audio

Internal speaker (mixed audio)

D DATA JACK PIN ASSIGNMENT

qDATA IN

Input terminal for data transmit. See p. 67 for details on
how to toggle data speed between 1200 (AFSK) and
9600 bps (G3RUH, GMSK).

wGND

Common ground for DATA IN, DATA OUT and AF OUT.

ePTT P

PTT terminal for packet operation only. Connect ground to
transmit data.

rDATA OUT

Data out terminal for 9600 bps operation only.

tAF OUT

Data out terminal for 1200 bps operation only.

yP SQL

Becomes high (+5 V) when the transceiver receives a sig­nal which opens the squelch.

• To avoid unnecessary TNC transmission, connect squelch to the
TNC to inhibit transmission when receiving signals.

• Keep audio output at a normal level, otherwise a “P SQL” signal
will not be output.

1

6

1 PANEL DESCRIPTION

■ Microphone (HM-133*)

q
w
e

r

t

*

A different microphone
may be supplied de­pending on version.

qVFO/LOCK SWITCH [VFO/LOCK]

➥ Push to select VFO mode. (p. 12)
➥ Push for 1 sec. to switch the lock function ON and OFF.

(p. 15)

wPTT SWITCH

➥ Push and hold to transmit; release to receive.
➥ Switches between transmitting and receiving while the

one-touch PTT function is in use. (p. 21)

eUP/DOWN SWITCHES [Y]/[Z]

➥ Push either switch to change operating frequency,

memory channel, set mode setting, etc.

➥ Push either switch for 1 sec. to start scanning. (p. 40)

7

!1
!0
o
i

u
y

Mic element

(pgs. 13, 28, 55)

rACTIVITY INDICATOR

➥ Lights red while any key, except [FUNC] and [DTMF-S],

is pushed, or while transmitting.

➥ Lights green while the one-touch PTT function is in use.

tKEYPAD (pgs. 8, 9)
yFUNCTION INDICATOR

➥ Lights orange while [FUNC] is activated—indicates the

secondary function of switches can be accessed.

➥ Lights green when [DTMF-S] is activated—DTMF sig-

nals can be transmitted with the keypad.

u2nd FUNCTION SWITCH [FUNC]
iDTMF SELECT SWITCH [DTMF-S] (p. 48)
oFUNCTION SWITCHES [F-1]/[F-2] (p. 64)

Program and recall your desired transceiver conditions.

!0BAND SWITCH [BAND] (p. 11)

Push to switches main band between left and right bands.

!1MEMORY/CALL SWITCH [MR/CALL]

➥ Push to select memory mode. (p. 12)
➥ Push for 1 sec. to select call channel. (p. 37)

✔

Important!

All keys on the microphone function for the main band only.

PANEL DESCRIPTION

1

■ Microphone keypad

KEY FUNCTION SECONDARY FUNCTION ( +key) OTHER FUNCTIONS

Switches between opening and closing the
squelch. (p. 16)

Starts and stops scanning. (p. 40)

Starts and stops priority watch. (p. 46)

Selects high output power. (p. 20)

Selects mid. output power. (p. 20)

Selects low output power (p. 20)

Selects minus duplex operation. (p. 24)

Selects plus duplex operation. (p. 24)

Selects simplex operation. (p. 24)

Increases audio output level. (p. 16)

In VFO mode enters operating band select­ing condition. (p. 12)
In memory mode enters bank selecting
condition. (p. 34)

Starts and stops tone scanning. (p. 54)

Turns the one-touch PTT function ON and
OFF. (p. 21)

Turns the DTCS squelch ON. (p. 52)

Turns the DTCS pocket beep function ON.

(p. 52)

Turns the DTMF memory encoder function
ON. (p. 48)

Turns the subaudible tone encoder ON.

(p. 24)

Turns the CTCSS pocket beep function
ON. (p. 52)

Turns the tone squelch function ON.

(p. 52)

Sends a 1750 Hz tone signal while pushing
and holding. (p. 26)

After pushing :
Transmits the appropriate
DTMF code. (pgs. 26, 50)
When the DTMF memory en­coder is activated, push [0] to
[9] to transmit the appropriate
DTMF memory contents .

1

(p. 49)

8

1 PANEL DESCRIPTION

KEY FUNCTION SECONDARY FUNCTION ( +key) OTHER FUNCTIONS

➥ Cancels frequency entry. (p. 13)
➥ Cancels the scan or priority watch.

(pgs. 40, 46)

➥ Exit set mode. (p. 55)

➥ Enters set mode (p. 55)
➥ Advances the set mode selection order

after entering set mode. (p. 55)

➥ Sets the keypad for numeral input.

(p. 13)

➥ Reverses the set mode selection order

after entering set mode. (p. 55)

Adjusts the squelch level increments.

(p. 16)

Decreases audio output level. (p. 16)

Adjusts the squelch level decrement.

(p. 16)

9

➥ Selects a memory channel for program-

ming. (p. 30)

➥ Advances the memory channel number

when continuously pushed after pro­gramming is completed. (p. 30)

DTMF memory encoder function OFF.

(p. 49)

Turns the subaudible tone encoder, pocket
beep or CTCSS/DTCS tone squelch OFF.

(pgs. 24, 52)

Mutes the audio. (p. 21)

• Mute function is released when any oper­ation is performed.

Sends a 1750 Hz tone signal for 0.5 sec.

(p. 26)

Locks the digit keys on the keypad (includ­ing the A to D, # and M keys. (p. 15)

After pushing :
Transmits the appropriate
DTMF code. (pgs. 26, 50)

PANEL DESCRIPTION

w

q

ON

OFF

e

w

r

q

ON

OFF

e

• HM-118N

• HM-118TN

(DTMF)

1

■ Optional Microphones

(HM-118N/TN)

1

qPTT SWITCH

➥ Push and hold to transmit; release to receive.

wUP/DOWN SWITCHES [UP]/[DN]

➥ Push either switch to change operating frequency,

memory channel, set mode setting, etc.

➥ Push either switch for 1 sec. to start scanning.

eUP/DN LOCK SWITCH

Slide to toggle [UP]/[DN] switches function ON and OFF.

rKEYPAD (HM-118TN only)

While pushing [PTT], push the desired key to send the
DTMF code.

10

2

MAIN

T X

MAIN

T X

M

M

Frequency band initial is displayed.

Push the desired band’s
[MAIN•BAND] for 1 sec.

[DIAL]

BAND

Push the desired band’s
[MAIN•BAND]

Push [PWR] for 1 sec.

SETTING A FREQUENCY

■ Preparation

D Turning power ON/OFF

➥ Push [PWR] for 1 sec. to turn power ON and OFF.

D MAIN band

The IC-2725E can receive 2 m and 70 cm band signals si­multaneously. To activate all functions access or to change
frequency via the microphone, you must designate one band
as the main band. The transceiver transmits a signal on the
main band only.

➥ Push the desired band’s [MAIN•BAND] to select the main

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band.

•“Q” indicates the main band.

➥ Push [BAND] to toggle the main band between

left and right bands.

D Operating frequency band selection

In the default condition, or after resetting the CPU, 2 m band
is assigned in the left band, 70 cm band is assigned in the
right band. However, the 2 m band can also be assigned into
the right, and 70 cm band can also be assigned into the left
band.

qPush the desired band’s [MAIN•BAND] for 1 sec.

• Frequency band initial appears.

wRotate the same band’s [DIAL] to select the desired fre-

quency band.

• Pushing [Y]/[Z] on the microphone also selects the band.

ePush the [MAIN•BAND] to return to frequency indication in

the selected frequency band.

Note that in this manual, sections beginning with a micro­phone icon (as at left), designate operation via the HM-133
microphone.

VFO/LOCK

MAIN

T X

MAIN

T X

M

M

Push [M/CALL•MW]
to select memory mode

VFO mode is selected

“!” indicator appears when
memory mode is selected

Push [V/MHz•SCAN]
to select VFO mode

BANK

[Y]/[Z]

z Push [BAND] to select main band.

x Push [FUNC], the push [

BANK

1(MONI)] to se-

lect frequency band selecting condition.

• The frequency band initial is displayed.

c Push [Y]/[Z] to select the desired frequency

band.

v Push [

CLR

A(MW)] to exit the condition, and re-

turn to frequency indication.

SETTING A FREQUENCY

2

D VFO and memory modes

The transceiver has 2 basic operating modes: VFO mode and
memory mode. Select VFO mode first to set an operating fre­quency.

➥ Push the desired band’s [V/MHz•SCAN] to select VFO

mode.

• When VFO mode is already selected, the digit below 10 MHz
(the digit below 1 MHz or 100 kHz disappear depending on ver­sions) disappear. In this case, push [V/MHz•SCAN] again (or
twice or 3 times depending on version).

➥ Push [M/CALL•MW] to select memory mode.

•“!” indicator appears when memory mode is selected.

➥ Push [VFO/LOCK] to select VFO mode.
➥ Push [MR/CALL] to select memory mode.

• The microphone controls the main band only. Push
[BAND] to toggle the main band, then push
[VFO/LOCK] or [MR/CALL], if necessary.

2

12