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CDMA CELLULAR
TELEPHONE
SCH-811
SERVICE Manual
CDMA CELLULAR TELEPHONE 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. PCB diagrams
10. Block & circuit diagrams
SAMSUNG PROPRIETARY-CONTENTS MAY CHANGE WITHOUT NOTICE
ELECTRONICS
Samsung Electronics Co.,Ltd.
GH68-00398A
1999. 3. REV. 1.0
1. General Description
The SCH-811 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 Systems
IS-98A : Standards for Dual-Mode Wideband Spread Spectrum Cellular Mobile Station
IS-126 : Mobile Station Loopback Service Options Standard
SCH-811 is composed of main handset, rapid charger, three batteries (1600 mAh, 1000 mAh, 550mAh), hands-
free kit, car adaptor, and travel charger. 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 1-1
2. Specification
2-1 General
Frequency Range Digital Mode Analog Mode
Transmitter : 824 ~ 849 MHz 824 ~ 849 MHz
Receiver : 869 ~ 894 MHz 869 ~ 894 MHz
Channel Spacing : 1.23 MHz 30kHz
Number of Channels : 20 FA 832CHs
Duplex Spacing : 45 MHz 45MHz
Frequency Stability :