Rf Module; Environmental Specifications; Main Technical Specifications; Maximum Ratings - Nokia NSB-6 Series Technical Documentation Manual

PAMS Technical Documentation

RF Module

This RF module takes care of all RF functions of EGSM/GSM1900 dual-
band engine. RF circuitry is located on one side of the 8 layer tranceiver–
PCB. PCB area for the RF circuitry is about 15 cm2. The RF design is
based on the first dualband direct conversion RF–IC "Hagar". So there is
no intermediate frequency and that means the number of component is
much lower than before and there shall be much less interference prob-
lems than previously.
EMC emissions are taken care of using metallized plastic shield, which
screens the whole transceiver. Internal screening is realized with isolated
partitions. VCO is isolated in it's own locker. PA and some surrounding
components are covered with metal can. The baseband circuitry is lo-
cated on the same side of the same board.

Environmental specifications

Normal and extreme voltages
Lithium–ion battery ( 1 cell )
Nominal voltage:
Lower extreme voltage:
Higher extreme voltage:
Absolute maximum voltage:
Software cut–off voltage:

Main Technical specifications

Maximum Ratings

Battery voltage, idle mode
Regulated supply voltage
Voltage reference
Operating temperature range
Absolute maximum battery voltage

RF Characteristics

Receive frequency range
Transmit frequency range
Duplex spacing
Channel spacing
Number of RF channels
Power class
Number of power levels
Issue 1 06/2000
3.9 V
0.85 x 3.9 = 3.31 V
same as nominal
4.8 V
3.1 V
Parameter
Item
925 ... 960 MHz / 1930 ... 1990 MHz
880 ... 915 MHz / 1850 ... 1910 MHz
45 MHz / 80 MHz
200 kHz
174 / 299
4 (EGSM900) / 1 (GSM1900)
15 / 16
E Nokia Mobile Phones Ltd.
(during TX burst)
Rating
3.9 V
2.8 +/– 3% V
1.5 +/– 1.5% V
–10...+55 deg. C
4.8 V
Values (EGSM / GSM1900)
NSB–6
System Module
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