Nokia 8390 Manuales De Servicio
NSB-8
System Module & UI
PAMS Technical Documentation
Page 4
ãNokia Corporation
Issue 1 01/02
Transceiver NSB-8
Introduction
The NSB-8 is a single band radio transceiver unit for GSM1900 networks. The GSM1900
power class is 1. It is a true 3 V transceiver, with an internal antenna and vibra.
power class is 1. It is a true 3 V transceiver, with an internal antenna and vibra.
The transceiver has a full graphic display and the user interface is based on a Jack style
UI with two soft keys.
UI with two soft keys.
An internal antenna is used, there is no connection to an external antenna.
The transceiver has a low leakage tolerant earpiece and an omnidirectional microphone,
providing an excellent audio quality. The transceiver supports a full rate, and an
enhanced full rate speech decoding.
providing an excellent audio quality. The transceiver supports a full rate, and an
enhanced full rate speech decoding.
An integrated IR link provides a connection between two NSB-8 transceiver or a trans-
ceiver and a PC (internal data), or a transceiver and a printer.
ceiver and a PC (internal data), or a transceiver and a printer.
The small SIM (Subscriber Identity Module) card is located under the battery. SIM inter-
face supports both 1.8 V and 3 V SIM cards.
face supports both 1.8 V and 3 V SIM cards.
Electrical Modules
The radio module consists of Radio Frequency (RF) and baseband (BB). User Interface (UI)
contains display, keyboard, IR link, vibra, HF/HS connector and audio parts. UI is divided
into radio module PWB RM8 and UI PWB LK5.
contains display, keyboard, IR link, vibra, HF/HS connector and audio parts. UI is divided
into radio module PWB RM8 and UI PWB LK5.
The electrical part of the keyboard is located in separate UI PWB named LK5. LK5 is con-
nected to radio PWB through spring connectors.
nected to radio PWB through spring connectors.
The System blocks provide the MCU, DSP, external memory interface and digital control
functions in UPP ASIC (Universal Phone Processor). Power supply circuitry, charging,
audio processing and RF control hardware are in UEM ASIC (Universal Energy Manage-
ment).
functions in UPP ASIC (Universal Phone Processor). Power supply circuitry, charging,
audio processing and RF control hardware are in UEM ASIC (Universal Energy Manage-
ment).
The purpose of the RF block is to receive and demodulate the radio frequency signal from
the base station and to transmit a modulated RF signal to the base station.
the base station and to transmit a modulated RF signal to the base station.
Operation Modes
The transceiver has six different operation modes:
• power off mode
• idle mode
• active mode
• charge mode
• local mode
• test mode
• idle mode
• active mode
• charge mode
• local mode
• test mode