E TECH IS400 Users Manual
E-TECH Co., Ltd 1/16
▶ Table of Contents◀
1. Introduction
2. Description of Unit
3. Technical Specifications
4. Theory of Operation
5. Circuit Descriptions
6. Parts List
7. Block Diagram
8. CONTROL Layout (Upper Side)
9. CONTROL Layout (Bottom Side)
10. RF Layout (Upper Side)
11. RF Layout (Bottom Side)
12. Circuit Diagram
FILE: IS 400 service manual.doc 2004.05.07
E-TECH Co., Ltd 2/16
1. Introduction
IS400 has a compact size with a various features in the range of 405~490MHz. IS400
Has a various features shown as below.
IS400 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
Items Model
Radio IS400
Supplied
1700mAh Li-Ion battery pack BL 1700
Package
External / Speaker Microphone ES-1
Accessories
Antenna IA-444
Desktop rapid charter IC-170
Adaptor
User manual
Items Model
Earpiece Microphone EP-1
Earpiece VOX Microphone EV-1
VOX & PTT Headset VP-1
FILE: IS 400 Service manual.doc 2005.11.29
E-TECH Co., Ltd 3/16
3. Technical Specifications
3-1 General
1) Frequency range : 405~490 MHz
2) Channels : 255 Channels
3) Channel spacing : 12.5 kHz/25 kHz
4) Communication method : Simplex
5) Antenna Impedance : 50 ohm
6) Antenna : Helical Antenna
7) Power supply voltage : LI-1700mAh Li-Ion battery pack(Voltage: 7.4V DC)
8) Current Drain : When Transmitting(4W) - < 2A
When Receiving(0.5W) - < 300mA
Transmit standby - < 60mA
Receiver standby(PSC MODE) - < 50mA
9) Microphone : Internal Condenser Microphone(External Speaker Micro
phone is available)
10) Operating temperature range: -30 +℃～ 60℃
11) Size : 56(W)x100(H)x34(D)
12) Weight : 285g
3-2 Transmitter
1) Power Output : HIGH –4W, LOW - 1W
2) Modulation : 8K5OF3E/16KOF3E
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 : -36 [dBm]
8) FM Hum & Noise : -40 [dB] (HP8920A 300Hz 3kHz BP～ F)
9) BAND SPREAD : 85 [MHz]
FILE: IS 400 Service manual.doc 2005.11.29
E-TECH Co., Ltd 4/16
3-3 Receiver
1) Receiver Type : Double Super Hetero type
2) Sensitivity : -0.25uV 이하(12dB SINAD 시)
3) Frequency Stability : ±0.00025%(±2.5PPM)
4) SPURIOUS Rejection : -70 dB
5) Adjacent Channel Selectivity: -60 dB (Narrow) , -70 dB (Wide)
6) Distortion : 5% (1 kHz 60%)
7) Hum & Noise : -40 dB(HP8920A 300Hz 3kHz ～ BPF)
8) Audio output : 1000 mW
9) BAND SPREAD : 85MHz
10) Speaker size : 45 pi
4. Theory of Operation
EXTERNAL VIEW
13)Emergency key
1)Antenna
8)Power ON/OFF
& Volume control
9)Ear/Mic JACK
10) Menu Button
11)Mic
12)SPEAKER
3) PTT Button
4) TX POWER
HIGH/LOW
5)Monitor Button
6) UP button
2)LCD
7)DOWN Button
FILE: IS 400 Service manual.doc 2005.11.29
E-TECH Co., Ltd 5/16
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 menu.
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. LOCATION INDICATE : Indicate where the radio is located by blinking green light every 7 seconds.
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. BACKLIGHT : Lamp is lighting when you check LCD status.
FILE: IS 400 Service manual.doc 2005.11.29
E-TECH Co., Ltd 6/16
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.Battery level indicator: Indicates reaming battery power.
6.VOX ON/OFF: Appears when VOX function is turned On.
7.SCAN: Appears when Scan function is activated.
8.SCRAMBLE: Appears while the voice scrambler function is activated.
9.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
to enter Menu Mode.
button, you can select the desir ed channel.
3)
4)
5)
to select
or to scroll list
to exit
FILE: IS 400 Service manual.doc 2005.11.29
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