Rf Module; Maximum Ratings; Rf Characteristics - Nokia NSM-3 Series Technical Documentation Manual

PAMS Technical Documentation

RF Module

This RF module takes care of all RF functions of EGSM/DCS1800 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 lover than before and there shall be much less interference prob-
lems than previously.
EMC emissions are taken care of using metallized plactic shield, which
screens the whole transceiver. Internal screening is realized with isolated
partitions. At least the VCO is isolated. The baseband circuitry is located
on the same side of the same board.

Maximum Ratings

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

RF Characteristics

Receive frequency range
Transmit frequency range
Duplex spacing
Channel spacing
Number of RF channels
Power class
Number of power levels
Issue 4 02/2002
Parameter
Item
925 ... 960 MHz / 1805 ... 1880 MHz
880 ... 915 MHz / 1710 ... 1785 MHz
45 MHz / 95 MHz
200 kHz
174 / 374
4 (EGSM900) / 1 (DCS1800)
15 / 16
E Nokia Corporation
Rating
3.9 V
2.8 +/– 3% V
1.5 +/– 1.5% V
–10...+55 deg. C
4.8 V
Values (EGSM / DCS1800)
NSM–3/3D
System Module
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