User Guide

NSM–5
System Module
PAMS Technical Documentation
Page 45
Issue 1 02/2002
 Nokia Corporation
comes in system clock has to be settled into +/– 0.1 ppm frequency accu-
racy. The VCTCXO–module requires also 5 ms to settle into final frequen-
cy. Amplitude rises into full swing in 1...2 ms, but frequency settling time is
higher so this oscillator must be powered up early enough.
DC–compensation
DC compensation is made during DCN1 and DCN2 operations (controlled
via serial bus). DCN1 is carried out by charging the large external capaci-
tors in AGC stages to a voltage which cause a zero dc–offset. DCN2 set
the signal offset to constant value (RXREF 1.2 V).
Receiver characteristics
Item Values
Type Direct conversion, Linear, DualBand, FDMA/TDMA
LO frequencies 3700 ... 3840 MHz / 3610 ... 3760 MHz
Typical 3 dB bandwidth +/– 104 kHz
Sensitivity min. – 102 / – 102 dBm (EGSM/PCN) , S/N >8 dB
Total typical receiver voltage gain ( from
antenna to RX ADC )
90 dB
Receiver output level ( RF level –95 dBm ) 350 mVpp , single ended I/Q–signals to RX ADCs
Typical AGC dynamic range 80 dB
Accurate AGC control range 50 dB
Typical AGC step in LNA 30 dB
Usable input dynamic range –102 ... –10 dBm
RSSI dynamic range –110 ... –48 dBm
Compensated gain variation in receiving
band
+/– 1.0 dB
Transmitter characteristics
Item Values
Type Direct conversion, dualband, non–linear,
FDMA/TDMA
LO frequency range 3520 ... 3660 / 3420 ... 3570 MHz
Output power 2 W / 1 W peak
Gain control range min. 30 dB
Maximum phase error ( RMS/peak ) max 5 deg./20 deg. peak