Samsung SCH-A105 Manuale utente

SERVICE

CDMA Cellular Phone

SCH-A105

Manual

CDMA Cellular Phone CONTENTS

1. General Introduction

2. Specification

3. Installation

4. NAM Programming

5. Product Support Tools

6. Troubleshooting

7. Exploded view and its Part List

8. Electrical Parts List

9. Block diagram

10. PCB diagrams

11. Circuit diagrams

OK/

. ‘

©Samsung Electronics Co.,Ltd. July. 2000

Printed in Korea.

Code No.: GH68-01246A

BASIC.

ELECTRONICS

1. General Description

The SCH-A105 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/Softer 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 specifications 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 Station

•IS-126 : Mobile Station Loopback Service Options Standard

SAMSUNG Proprietary-Contents may change without notice

1-1

SAMSUNG Proprietary-Contents may change without notice

2-1

2. Specification

2-1 General

Frequency Range Digital Mode Analog Mode

Transmitter : 824.64 ~ 848.37 MHz 824 ~ 849 MHz

Receiver : 869.64 ~ 894.37 MHz 869 ~ 894 MHz

Channel Spacing : 1.23 MHz 30 kHz

Number of Channels : 20 EA 832 CHs

Duplex Spacing : 45 MHz 45 MHz

Frequency Stability : ±2.5 ppm (-20˚C ~ +50˚C, -4˚F ~ +122˚F)

Operating Temperature : -20˚C~+50˚C (-4˚F ~ +122˚F)

Operating Voltage

HHP : 3.6V DC (±10%)

Hands-free : 13.7V DC (±10%)

Operating Time

(Digital Mode)

Item Size (mm) Weight (g)

Including slim battery 80 x 42 x 22 93

Including standard battery 80 x 42 x 24 116

Item Standby Time Talk Time

Slim battery up to 100 hours up to 150 min

Standard battery up to 170 hours up to 250 min

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2-2

Specification

2-2 Digital Mode

Waveform Quality 0.944 or more

Time Reference ±1uS or less

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

-25 dBm, FER=0.5 % or less

Tx Output Power 280 mW (24.5 dBm)

Tx Frequency Deviation ±300 Hz or less

Occupied Band Width 1.32 MHz

Tx Conducted Spurious Emission 900 kHz : -42 dBc / 30 kHz below

1.98 MHz: -54 dBc / 30 kHz below

Minimum Tx Power Control below -50 dBm

-25 dBm: -57.0 dBm ~ -38.5 dBm

Open Loop Power Control -65 dBm: -17.5 dBm ~ + 1.5 dBm

-104 dBm: +18.0 dBm ~ +30.0 dBm

Standby Output Power below -61 dBm

Test1: ±24 dB or less

Test2: 0 mS ~ 2.5 mS

Closed Loop Tx Power Control Range Test3: ±24 dB or more

Test4: ±24 dB or more

Test5: ±24 dB or more

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2-3

Specification

2-3 ANALOG MODE

TRANSMITTER

RF output power

Carrier ON/OFF conditions

“ON” Condition

“OFF” Condition

Compressor

Compression Rate

Attack Time

Recovery Time

Reference Input

Preamphasis

Maximum Freqency Deviation

F3 of G3

Supervisory Audio Tone

Signaling Tone

Wideband Data

Post Deviation Limiter Filter

3.0 ~ 5.9KHz

5.9 ~ 6.1KHz

6.1 ~ 15KHz

Over 15KHz

Spectrum Noise Suppression

For all modulation

f0+20KHz ~ f0+45KHz

For modulation by voice and SAT

f0 +45KHz

For modulation by WBD(without SAT)

and ST (with SAT)

f0+45KHz ~ f0+60KHz

f0+60KHz ~ f0+90KHz

f0+90KHz ~ 2f0

Harmonic and conducted Spurious Emissions

0.6W (+2/-4dB)

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

below-60dBm (in 2mS)

2:1

3mS

13.5mS

Input level for producing a nominal ±2.9KHz

peak freqency deviation of transmitted carrier

6dB/OCT within 0.3 ~ 3KHz

±12KHz

±2KHz (±10%)

±8KHz (±10%)

above 40 LOG (F/3000) dB

above 35 dB

above 40 LOG (F/3000) dB

above 28 dB

above 26 dB

above 63 +10 LOG (PY) dB

above 45 dB

above 65 dB

above 63 +10 LOG (PY) dB

(where f0=carrier frequency

PY=mean output power in watts)

below 43 + 10 LOG (PY) dB

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2-4

Specification

RECEIVER

De-Emphasis

Expander

Expander Rate

Attack Time

Recovery Time

Reference Input

Sensitivity

Intermodulation Spurious Response Attenuation

RSSI Range

Protection Against Spurious Response

Interference

In Band Conducted Spurious Emission

Transmit Band

Receive Band

Other Band

Radiated Spurious Emission

Frequency Range

25 ~ 70 MHz

70 ~ 130MHz

130 ~ 174 MHz

174 ~ 260 MHz

260 ~ 470 MHz

470 ~ 1GHz

-6dB / OCT within 0.3 ~3KHz

1:2

within 3mS

within 13.5mS

output level to a 1000Hz tone from a carrier

within ±2.9KHz peak frequency deviation

12dB SINAD / -116dBm

avove 65dB

above 60dB

below -60dBm

below -80dBm

below -47dBm

Maximum Allowable EIRP

-45dBm

-41dBm

-41 ~ -32dBm

-32dBm

-32 ~ -26dBm

-21dBm

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2-5

Specification

2-4 CDMA Debug Display Information (menu 8)

IN IDLE MODE

IN CONVERSATION MODE

1 : Sxxxxx : SID (System ldentification) toggle

Nxxxxx : NID (Network Identification) toggle

2 : SIx : Slot cycle index (lowest between the system and the phone will be used)

3 : Handset Status : 0 - Acquisition

1 - Synchronization

2 - Paging (Idle)

3 - Traffic Initialization

4 - Traffic Mode

5 - Exit

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

5 : Dxxx : sector power in dBm

6 : -xx : Ec/Io

7 : Pxxx : PN offset

8 : CHxxxx : channel number

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

E : EVRC

V : 13k or 8k

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

11 : xx : Walsh code used in traffic channel

64 Sxxxx

TEx

T-xx Dxxx -xx

CHxxxxPxxx

REx xx x

T-xx Dxxx -xx

CHxxx

Pxxx

SIx x

91011

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3-1

3. Installation

3-1 Installing a Battery Pack

Push up and hold the catch above the battery on the back of

the phone (➀) and lift the battery away. (➁ ~ ➂)

Insert the saw-toothed end on the bottom of the battery into the slots

on the bottom of the phone (➀), then slide the battery down (➁).

➀➁➂

➁➀

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3-2

Installation

3-2 For Desk Top Use

1. Choose a proper location to install the charger for Desk Top use.

2. Plug the power cord of the charger into an appropriate wall socket. When the power is connected correctly,

the lamps turn on briefly.

3. To charge the battery pack, insert the battery pack into the rear slot of the charger. The lamp marked BAT on

the front panel of the charger lights up red.

4. If you do not wish to use the phone while charging the battery, insert the phone with the battery pack

attached into the front slot of the charger. The lamp marked PHONE on the front panel of the charger lights

up red.

Figure 3-1 Charging the Phone and Battery

SPECIFICATIONS USING “DTCA10”

Battery Type Slim Battery Standard Battery

(Li-ion, 500 mAh) (Li-ion, 1000 mAh)

Model Name BTIA10AA BTSA10AA

BTIA10AD BTSA10AD

SEC Code GH43-00173B GH43-00174B

GH43-00179B GH43-00180B

Charging Time 4 hours 4 hours

STANDARD

BATTERY

SLIM

BATTERY

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