E-TECH Co., Ltd 1/24
▶ Table of Contents◀
1. Introduction
2. Description of Unit
3. Technical Specifications
4. Features and operation
5. Antenna Installation
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1. Introduction
IM401 has a compact size with a various features in the range of 403~470MHz.
Has a various features shown as below.
IM401 constructed with a microprocessor controlled, temperature compensated Phase Locked
Loop(PLL) frequency synthesizer. The radio features a double conversion receiver and a direct FM
transmitter modulator. A special integrated circuit provides support to sub-audible signaling(CTCSS & DCS)
and most of the receiving parts are switched off periodically in the power save mode to reduce battery current
drain during standby.
2. Description of Unit
Supplied
Package
Accessories
Items Model
Radio IM 401
User manual
Items Model
Hand Microphone
Battery Cable
Pedestal
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3. Technical Specifications
3-1 General
1) Frequency range : 403~470 MHz
2) Channels : 255 Channels
3) Channel spacing : 12.5 kHz/25 kHz
4) Communication method : Simplex
5) Antenna Impedance : 50 ohm
6) Power supply voltage : DC 13.6V
7) Current Drain : When Transmitting(40W) - < 9A
When Receiving(3W) - < 1A
Transmit standby - < 150mA
8) Microphone : External Condenser Mic
9) Operating temperature range: -30 +60℃∼ ℃
10) Size : 178(W)x49(H)x195(D)
11) Weight : 1600g
3-2 Transmitter
1) Power Output : HIGH – 40W, LOW - 5W
2) Modulation : 8K50F3E/16K0F3E
3) Oscillator method : PLL
4) Frequency Stability : less than ±0.00025% (±2.5PPM)
5) Maximum frequency deviation: ±2.5 kHz(Narrow)/ ±5 kHz(Wide)
6) Audio Distortion : less than 5% (1 kHz 60%)
7) SPURIOUS Emission : -75 [dBc]
8) FM Hum & Noise : -40 / -45 [dB] (HP8920A 300Hz 3kHz BP∼ F)
9) BAND SPREAD : 67[MHz]
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3-3 Receiver
1) Receiver Type : Double Super Hetero type
2) Sensitivity : -0.25uV e.m.f ( 12dB SINAD )
3) Frequency Stability : ±0.00025%(±2.5PPM)
4) SPURIOUS Rejection : -70 dB
5) Adjacent Channel Selectivity: -65 dB (Narrow) , -70 dB (Wide)
6) Distortion : 5% (1 kHz 60%)
7) Hum & Noise : -40 / -45 dB(HP8920A 300Hz 3kHz BPF)∼
8) Audio output : Normal 3W ( Max 5W )
9) BAND SPREAD : 67MHz
10) Speaker size : 58 * 35 Oval
4. Features and Operation
EXTERNAL VIEW
1)POWER ON/OFF
& Volume control
7)Mic Jack &
PC-Programming
Jack
2) LED
8)Squelch
level
3)TX POWER
LOW
HIGH
9)DOWN button
4)LCD
10)Menu Button
5)SCAN Button
11)UP button
6)SPEAKER
12) Monitor
Key
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4-1 Features & Operation
1. Monitor
Press the Monitor key momentarily to disable the Tone squelch.
2. Radio Call
By using Various 5Tone, individual / Group call is available.
16 Receiving codes are available as well as open call.
3. Missed calls list
16 Missed calls can be listed. If a call remains unanswered, the call will be stored
by the radio.
4. contact list
During a call, the contact list may be used to give access to up to 16 preprogrammed
numbers accessed via the m enu.
5. status list
A status is a code for transmitting prearranged messages, e.g. status “05” may indicate
“launch”. Status list contains up to 30 entries.
6. Channel : 255 channel
7. Scan ON/off
8. Power level : Power level is adjustable in each channel respectively.
9. Talkaround on/off
10. Emergency :
11. Lone Worker
12. Tx Tone select : In the menu, tx dcs /ctcss tone is adjustable.
13. Rx Tone select : In the menu, rx dcs /ctcss tone is adjustable.
14. Group : Defines group tone. You can select tone code for group, and it is used as a default value
. 0~9 and a, b, c, d available. And “A” is used as a basic value..
15. BEEP ON/OFF : BEEP sound ON/OFF.
16. KEY LOCK : LOCK/UNLOCK Button KEY.
17. SQUELCH : Squelch level is adjustable
18. AUTO SQUELCH : Squelch level is adjustable automatically by surroundings.
19. DTMF ON/OFF : DTMF function is available.
20. VOX : VOX LEVEL is adjustable by pushing up and down button.
21. AUTO VOX : VOX level is adjustable automatically by surroundings.
22. P - SCAN : Priority Scan
23. POWER SAVE : Power save mode is available.
24. PASS WORD : This function is useful for security reason.
25. Dimmer : Control back light
26. SCRMABLE : Internal Voice Scrambler is available.
27. STUN / UNSTUN : For added security and to avoid abuse of the radio system in which you operate
a feature known as Stun/Unstun is included in your radio.
28. BACK LIGHT : Lamp is lighting when you check LCD status.
29. Reset : Radio Data Reset.
30.MIC GAIN: Mic sensitivity control
31.Vari Call :Variable Call
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4-2 LCD Display and Icons
1.ANT GAZE ; Shows the received signal strength.
2.TX POWER HIGH: Indicate power level
3.KEY LOCK: Appears during key lock function is ON.
4.ALART(BEEP) ON/OFF: Appears when beep sound is turned ON.
5.VOX ON/OFF: Appears when VOX function is turned On.
6.SCAN: Appears when Scan function is activated.
7.SCRAMBLE: Appears while the voice scrambler function is activated.
8.TALK AROUND Indicator.
4-3 Features
1. Channel
This radio offers up to 255 channels
1). By using
2. Missed calls list
Up to 16 calls can be stored. If the same radio calls more than once, only the most recent call is stored.
When fifteen calls have been stored by the radio, depending on the radio programming the sixteenth call
received may overwrite the first or not be stored by the radio.
1).
2) Display shows
3)
to select
to enter Menu Mode.
or button, you can select the desired cha nnel.
4)
5)
or to scroll list
to exit
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3. Contact list
1). to enter Menu Mode.
2)
3)
or to scroll list
4)
5)
to exit
4. Status call list
4-1. Making STATUS call
1)
2)
or to until
to select
to enter Menu Mode.
or to until
3)
4)
5) Push PTT KEY for sending message on the LCD.
to select
or to scroll list
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4-2 Make STATUS Message
1) to enter Menu Mode.
or to until
2)
to select
3)
4)
to SELECT
5)
5. Lone work
to enter Menu Mode.
1).
or to until
2)
3)
4)
or to scroll list
to select
or to select ON/OFF
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6. Tx power
.1) . to enter Menu Mode.
2)
3)
4)
5)
7. Tx Tone
Selecting Transmitting TONE(CTCSS/DCS).
1). to enter Menu Mode.
2)
or to until
to select
or to select HIGH / LOW POWER
to select
or to until
3)
4)
0= NON TONE
1-38 CTCSS
101 – 183 DCS TONE
5)
to select
or to Select TONE을 either CTCSS or DCS.
to select exit
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8. Rx Tone
Changing Receiving TONE(CTCSS/DCS).
1).
2) or to until
3)
4)
0= NON TONE
1-38 CTCSS
101 – 183 DCS TONE.
5) to select exit
9. Group
Changing GROUP Tone.
to enter Menu Mode.
to select
or to select TONE either CTCSS or DCS.
1). to enter Menu Mode.
2)
3)
4)
5)
or to until
to select
or to select scroll list
to select exit
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10. Beep on/off
1). to enter Menu Mode.
2)
3)
4)
5)
11. Key lock
1).
2)
3)
or to until
to select
or to select on off .
to select
to enter Menu Mode.
or to until
to select
4)
5)
or to select key lock /unlock.
to select
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12. Squelch level
16 level is available. 0 = terminate sq function
1).
2)
3)
4)
5)
13. Auto Squelch
1).
to enter Menu Mode.
or to until
to select
or to the scroll list
to select exit
to enter Menu Mode.
2)
3)
4)
5)
or to until
to select
or to select on /off .
to select
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14. Scan
1). to enter Menu Mode.
2)
3)
4) Push PTT for exit
15. DTMF
1).
2)
3)
4)
or to until
to scan.
to enter Menu Mode.
or to until
to select
or to select ON /OFF.
5)
to select
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16. Vox on/off
1). to enter Menu Mode.
2) or to until
3)
4)
5)
17. Vox Level
1).
2)
3)
to select
or to select ON /OFF.
to select
16 level is available..
to enter Menu Mode.
or to until
to select
4)
5)
or to scroll list
to select for exit
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18. Auto Vox
1). to enter Menu Mode.
2) or to until
3)
4)
5)
19. Priority Scan
1).
2)
3)
to select
or to select ON /OFF.
to select
to enter Menu Mode.
or to until
to select
4)
5)
or to select ON /OFF.
to select
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20. Priority scan CH
1). to enter Menu Mode.
2)
3)
4)
5)
21. Power save
1).
2) or to until
or to until
to select
or to scroll list
to select for exit
to enter Menu Mode.
3)
4)
5)
to select
or to select ON /OFF.
to select
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22. Talkaround
1). to enter Menu Mode.
2)
3)
4)
5)
23. Password
1).
or to until
to select
or to select ON /OFF.
to select
to enter Menu Mode.
2) or to until
3)
4) or to select ON /OFF.
5)
to select
to select
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24. Password CH
1).
2) or to until
3)
4) ---- will display on the LCD( enter old password)
5) Enter new password by 4 digit.
25. Dimmer
Back light Control
to enter Menu Mode.
to select
or by pushing up and down KEY to change password.
by pushing enter KEY to change digit of password.
1).
2)
3)
4)
5)
to enter Menu Mode.
or to until
to select
or to select level
to select
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26. Scramble
1). to enter Menu Mode.
2)
3)
4)
5)
27. Status call Send
1).
2)
3)
or to until
to select
or to select ON /OFF.
to select
to enter Menu Mode.
or to until
to select
4)
5)
or to select ON /OFF.
to select
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28. Misscall List Delete
1). to enter Menu Mode.
2)
3)
4)
5)
29. Radio Reset
1).
2) or to until
or to until
to select
or to select ON /OFF.
to select
to enter Menu Mode.
3)
4)
5)
to select
or to select ON /OFF.
to select
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30. Variable call
1). to enter Menu Mode.
2)
3)
4)
5)
or to until
to select
or to select 1,2,3~A,B,C,D,E
to select
31. Mic Sensitivity Level (Mic Gain Control)
1).
2)
to enter Menu Mode.
or to until
3)
4)
“HIGH “is high sensitivity and “LOW” is normal sensitivity
to select
or to select HIGH/LOW.
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-Connector of Operation
①
⑤
ⓐ
ⓑ
Antenna
⑥
⑩
ⓒ
10PIN CONNECTOR DESCRIPTION
Connection Pin NO Function Remark
GND ① Ground GND
CPU_INT_PTT ② Push To Talk GND Enable
5V ③ Internal 5 Volt Regulator 5 Volt
FLAT_AUDIO_IN/OUT ④ Constant Audio Signal Level
S/W_BATT ⑤ Switched Battery 13.6V Enable
CPU_RSSI_DET ⑥ Received Signal Strength Indication
CPU_RX_PATH ⑦ Busy Rx
MIC ⑧ MIC Input
CPU_SP_MUTE ⑨ Speaker ON/OFF
CPU_TX_PATH ⑩ MIC MUTE
5V Enable
(Rx Signal Open)
0V Enable
(Speaker Close)
0V Enable
(MIC Input Close)
Power Supply & External Speaker Jack
Connection Pin NO Function Remark
13.6V ⓐ Power Cable 13.6V
GND ⓑ Ground
Speaker OUT ⓒ External Speaker Jack
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5. Antenna Installation
5-1 Antenna Installation and Compliance with Radio Frequency(RF) Energy Safety
Standards
[IMPORTANT NOTE]
To assure optimum performance and compliance with RF Energy Safety standards, this
antenna installation guidelines and Instructions are limited to metal-body vehicles with
appropriate ground planes and take into account the potential exposure of backseat
passengers and bystanders outside the vehicle.
[NOTE]
For mobile radios with rated power of 7 watts or less, the only installation restrictions are
to use only E-tech approved antennas and install the antenna externally on metal body
vehicles. For mobile radios with rated power greater than 7 watts, always adhere to all
the guidelines and restrictions in 5.2 below.
5-2 Selecting an Antenna Site/Location on a Metal Body Vehicle
1. External installation – Check the requirements of the antenna supplier and install the vehicle
antenna external to a metal body vehicle in accordance with those requirements.
2. Roof top – For optimum performance and compliance with RF Energy Safety standards, mount
the antenna in the center area of the roof.
3. Trunk lid – On some vehicles with clearly defined, flat trunk lids, the antenna of some radio
models (see restrictions below) can also be mounted on the center area of the trunk lid. For
vehicles without clearly defined, flat trunk lids (such as hatchback autos, sport utility vehicles, and
pick-up trucks), mount the antenna in the center area of the roof.
Before installing an antenna on the trunk lid.
• Be sure that the distance from the antenna location on the trunk lid will be at least 60cm (24
inches) from the front surface of the rear seat-back to assure compliance with RF Energy Safety
standards.
• Ensure that the trunk lid is grounded by connecting grounding straps between the trunk lid and
the vehicle chassis.
If these conditions can not be satisfied, then mount the antenna on the roof top !
4. Mounting restrictions for certain radio models
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For more than 40 Watt VHF models, the 1/4 wave antenna should be mounted only in the
center area of the roof, not on the trunk lid, to assure compliance with RF Energy Safety
standards.
5. Ensure that the antenna cable can be easily routed to the radio. Route the antenna cable as
far away as possible from any vehicle electronic control units and associated wiring.
6. Check the antenna location for any electrical interference.
7. Make sure any other mobile radio antenna on this vehicle is at least 30.48 cm (1 foot) away from
this antenna.
[NOTE]
Any two metal pieces rubbing against each other (such as seat springs, shift levers, trunk
and hood lids, exhaust pipes, etc.) in close proximity to the antenna can cause severe
receiver interference.
5-3 Antenna Installation Procedure
1. Mount the antenna according to the instructions provided with the antenna kit. Run the coaxial
cable to the radio mounting location. If necessary, cut off the excess cable and install the cable
connector.
2. Connect the antenna cable connector to the radio antenna connector on the rear of the radio.
5-4 Completing the Installation
1. Mount the microphone clip to a convenient spot near your radio.
2. Your microphone has a telephone-type connector at the end of is cord. Plug the microphone
into the control head connector.
3. To complete your radio installation, plug the power cable into the radio power connector.
FILE: IM401 service manual.doc 2006.01.10
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