Samsung SCH-A205 Manuale utente

DUALMODE(CDMA/AMPS)

PORTABLETELEPHONE

SCH-A205

SERVICEManual

1. General Instruction

2.Specification

3.CircuitDescription

4.NAMProgramming

5.TestProcedure&TestCommand

6.ElectricalPartsList

7.Block Diagram

8.PCB Diagram

9.SchematicDiagrams

10.ExplodedView&ItsPartList

DUALMODETELEPHONECONTENTS

Samsung Electronics Co.,Ltd. Dec. 99

Pinted in Korea.

Code No.: GH68-02022A

ELECTRONICS

SAMSUNG Proprietary - Contents may change without notice 1-1

1. General Instruction

The SCH-A205 cellular phone functions as both analog cellular phone working in AMPS(Advanced

Mobile Phone Service) mode and Digital cellular phone working in CDMA(Code Division Multiple

Access) mode.

CDMA type digital mode applies DSSS(Direct Sequential Spread Spectrum) mode which first came

to be used in the military.

The DSSS reduces channel cross talk and allow to use one frequency channel by multiple users in

the same specific area, resulting in increase of channel capacity to about ten times compared to that

of analog mode currently used.

Soft/Sofer Handoff, Hard Handoff, and Dynamic RF Power Control technologies are combined into

this phone to reduce the call drop while usage.

CDMA digital cellular network consists of MSO(Mobile Switching Office), BSC(Base Station

Controller), BTS (Base Station Transmission System), and MS(Mobile Station). MS meets the specifi-

cations of the below :

¥ IS-95A : Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread

Spectrum Cellular System

¥ IS-96A : Speech Service Option 1 Standard for Dual-Mode Wideband Spread Spectrum Cellular

System

¥ IS-98A : Standards for Dual-Mode Wideband Spread Spectrum Cellular Mobile System

¥ IS-126 : Mobile Station Loopback Service Options Standard

SCH-A205 is composed of main handset, one battery(800mAh), ear-microphone, and rapid DTC.

Travel adaptor(or travel charger) and HFK is optional. Hands-Free Kit is designed to be operated in

full-duplex mode taking turn-around delay between the phone and the system into account.

SAMSUNG Proprietary - Contents may change without notice 2-1

2. Specification

2-1 General

ITEM

Tx Freq. range

Rx Freq. range

Channel Bandwidth

Channel Spacing

Number of Channel

Duplex Separation

Type of Emission

In/Output Impedance

Tx Intermediate Freq.

Rx Intermediate Freq.

Tx Local Freq.

Rx Local Freq

TCXO freq.

Freq. Stability

Operating Temperature

CDMA

824 ~ 849MHz

869 ~ 894MHz

1.23MHz

30KHz

832

45MHz

40K0F8W,40K0F1D

50ohm

130.38MHz

85.38MHz

1st(260.76MHz)

2nd(FTX+130.38MHz)

1st(FRX+85.38MHz)

2nd(170.76MHz)

19.68MHz

(FRX -45MHz) ±300Hz

-30°C ~ +60°C

AMPS

824 ~ 849MHz

869 ~ 894MHz

30KHz

832

45MHz

40K0F8W,40K0F1D

50ohm

130.38MHz

85.38MHz

1st(260.76MHz)

2nd(FTX+130.38MHz)

1st(FRX+85.38MHz)

2nd(170.76MHz)

19.68MHz

±2.5ppm

-30°C ~ +60°C

Supply Voltage 3.75V

Size and Weight STD : 80mm X 43mm X 25.5mm, 85 g, 800 mA

SAMSUNG Proprietary - Contents may change without notice 2-2

2-2 Digital Mode

Waveform Quality 0.944 or more

Time Reference ±1uS or less

Rx Sensitivity and Dynamic Range -104dBm, FER=0.5% or less

-25dBm, FER=0.5% or less

Maximum TX Output Power 23dBm(200mW)

TX Frequency Deviation ±300Hz or less

Occupied Band Width 1.32MHz

TX Conducted Spurious Emission 900KHz : -42dBc / 30KHz below

1.98MHz: -54dBc / 30KHz below

Minimum TX Power Control below -50dBm

Open Loop Power Control -25dBm: -57.0dBm ~ -38.5dBm

-65dBm: -17.5dBm ~ + 1.5dBm

-104dBm: +18.0dBm ~ +30.0dBm

Standby Output Power below -61dBm

Colsed Loop TX Power Control Range Test1: ±24dB or less

Test2: 0mS ~ 2.5mS

Test3: ±24dB or more

Test4: ±24dB or more

Test5: ±24dB or more

SAMSUNG Proprietary - Contents may change without notice 2-3

2-3 ANALOG MODE

TRANSMITTER

RF output power 0.6W (+2/-4dB)

Carrier ON/OFF conditions

"ON" Condition within ±3dB of specification output (in 2mS)

"OFF" Condition below -60dBm (in 2mS)

Compressor

Compression Rate 2:1

Attack Time 3mS

Recovery Time 13.5mS

Reference Input Input level for producing a nominal ±2.9KHz peak

freqency deviation of transmitted carrier

Preamphasis 6dB/OCT within 0.3 ~ 3KHz

Maximum Freqency Deviation

F3 of G3 ±12KHz

Supervisory Audio Tone ±2KHz (±10%)

Signaling Tone ±8KHz (±10%)

Wideband Data ±8KHz (±10%)

Post Deviation Limiter Filter

3.0 ~ 5.9KHz above 40 LOG (F/3000) dB

5.9 ~ 6.1KHz above 35 dB

6.1 ~ 15KHz above 40 LOG (F/3000) dB

Over 15KHz above 28 dB

Spectrum Noise Suppression

For all modulation

f0+20KHz ~ f0+45KHz

above 26 dB

For modulation by voice and SAT

f0+45KHz

above 63 +10 LOG (PY) dB

For modulation by WBD(without SAT)

and ST (with SAT)

f0+45KHz ~ f0+60KHz above 45 dB

f0+60KHz ~ f0+90KHz above 65 dB

f0+90KHz ~ 2f0above 63 +10 LOG (PY) dB

(where f0=carrier frequency

PY=mean output power in watts)

Harmonic and conducted Spurious Emissions below 43 + 10 LOG (PY) dB

SAMSUNG Proprietary - Contents may change without notice 2-4

RECEIVER

De-Emphasis -6dB / OCT within 0.3 ~3KHz

Expander 1:2

Expander Rate within 3mS

Attack Time within 13.5mS

Recovery Time

output level to a 1000Hz tone from a carrier within

Reference Input ±2.9KHz peak frequency deviation

Sensitivity 12dB SINAD / -116dBm

Intermodulation Spurious Response Attenuation avove 65dB

RSSI Range above 60dB

Protection Against Spurious above 60dB

Response Interference

In Band Conducted Spurious Emission

Transmit Band below -60dBm

Receive Band below -80dBm

Out of Band Conducted Spurious Emissions below -47dBm

Radiated Spurious Emission

Frequency Range Maximum Allowable EIRP

25 ~ 70 MHz -45dBm

70 ~ 130MHz -41dBm

130 ~ 174 MHz -41 ~ -32dBm

174 ~ 260 MHz -32dBm

260 ~ 470 MHz -32 ~ -26dBm

470 ~ 1GHz -21dBm

SAMSUNG Proprietary - Contents may change without notice 2-5

MSC Transmitter Frequency

FA NO. CH NO. Center Frequency FA NO. CH NO. Center Frequency

1 1011 824.64MHz 11 404 837.12MHz

2 29 825.87MHz 12 445 838.35MHz

3 70 827.10MHz 13 486 839.58MHz

4 111 828.33MHz 14 527 840.81MHz

5 152 829.56MHz 15 568 842.04MHz

6 193 830.79MHz 16 609 843.27MHz

7 234 832.02MHz 17 650 844.27MHz

8 275 833.25MHz 18 697 845.91MHz

9 316 834.48MHz 19 738 847.14MHz

10 363 835.89MHz 20 779 848.37MHz

MSC Receiver Frequency

FA NO. CH NO. Center Frequency FA NO. CH NO. Center Frequency

1 1011 869.64MHz 11 404 882.12MHz

2 29 87.087MHz 12 445 883.35MHz

3 70 872.10MHz 13 486 884.58MHz

4 111 873.33MHz 14 527 885.81MHz

5 152 874.56MHz 15 568 887.04MHz

6 193 875.79MHz 16 609 888.27MHz

7 234 877.02MHz 17 650 889.27MHz

8 275 878.25MHz 18 697 890.91MHz

9 316 879.58MHz 19 738 892.14MHz

10 363 880.89MHz 20 779 893.37MHz

SAMSUNG Proprietary - Contents may change without notice 2-6

2-4 CDMA Debug Display Information (menu 9 000000 1)

IN IDLE MODE

Sxxxxx : SID (System Identification) toggle

Nxxxxx : NID (Network Identification) toggle

• SIx : Slot cycle index (lowest between the system and the

phone will be used)

• Handset Status : 0-Acquisition

1-Synchronization

2-Paging(Idle)

3-Traffic Initialization

4-Traffic Mode

5-Exit

• T-xx : Tx adjust, Value ranges from +63~-63dB

• Dxxx : sector power in dBm

• -xx : Ec/Io

• Pxxx : PN offset

• CHxxxx : channel number

• TEx : Tx vocoder rate (8 is full rate, 1 is 1/8th rate)

E : Echo canceler

• REx : Rx vocoder rate (8 is full rate, 1 is 1/8th rate)

• xx : Walsh code used in traffic channel

• SIDxxxxx : FM Home System ID

• PWRx : Power Level 0~7

• SATx : Supervisory Audio Tone code (0~3)

• x (Using Frequency Band) : A Band or B Band

• RSSIxxx : RSSI value

• CHxxx : Using Channel

S xxxxx SI x x

T-xx D xxx -xx

P xxx CH xxxx

2-5 FM Debug Display Information (menu 9 000000 1)

SID xxxxx x

PWR x RSSI xxx

SAT x CH xxxx

TE x RE x xx x

T-xx D xxx -xx

P xxx CH xxxx

IN CONVERSATION MODE

SAMSUNG Proprietary - Contents may change without notice 4-1

4. NAM Programming

NAM feature can be programmed as follows

1. Press Menu+6+0 to enter the NAM programming mode, and enter the service code.

2. If you enter the NAM programming mode, each item shows the currently stored data

Go to the next item by pressing the OK key

3. You can modify the data by entering a new data and store it by pressing the OK key

4. If you enter a wrong digit press the CLR key to delete the last digit.

Press and hold the CLR key to delete all digits

5. To scroll items backwards or forwards without changing, push the OK(scroll) key to the up or down.

6. After finishing the NAM programming, press the END key to exit the NAM pragramming mode.

LCD Display Key Input Function

Menu+6+0+

service code Enter the NAM programming mode

NAM program

1:Setup NAM1 1 Chose 'Setup NAM1'

2:Setup NAM2

NAM1 New data Phone number is displayed.

Phone # or To change the phone number, enter the new one.

3003003000 OK Press the OK key to store it.

NAM1 New data Directory number is displayed.

Directory # or To change the directory number, enter the new one.

3003003000 OK Press the OK key to store it.

NAM1 The roaming list is enabled or not.

Activate PRL OK To change sytem selection operaiton push the OK(scroll) key

No to the right or left. Press the OK key to store it.

NAM1 New data Analog home system ID, current status is displayed.

Anlg HomeSID or To change the SID, enter the new one.

32768 OK Press the OK key to store it

NAM1 New data 1st CDMA home system ID, current status is displayed.

Dgtl HomeSID or To change the SID, enter the new one.

32768 OK Press the OK key to store it

NAM1 To program the more NAM item push the OK(scroll) key to

More Prog.? OK the right or left. Press the OK key.

No If service code prompt is displayed, you have to enter the

service code.

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