Nokia NHM-7 series, Руководство по обслуживанию

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NHM–7
System Module & UI
PAMS Technical Documentation
Page 32 Issue 1 10/2001
Nokia Corporation
RF characteristics
Item Values (E–GSM / GSM1800)
Receive frequency range 925 ... 960 MHz / 1805...1880 MHz
Transmit frequency range 880 ... 915 MHz / 1710...1785 MHz
Duplex spacing 45 MHz / 95 MHz
Channel spacing 200 kHz
Number of RF channels 174 / 374
Power class 4 (2 W) / 1 (1 W)
Number of power levels 15 / 16
Transmitter characteristics
Item Values (E–GSM/GSM1800)
Type Direct conversion, nonlinear, FDMA/TDMA
LO frequency range 3520...3660 MHz / 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
Receiver characteristics
Item Values, E–GSM/GSM1800
Type Direct conversion, Linear, FDMA/TDMA
LO frequencies 3700...3840 MHz / 3610...3760 MHz
Typical 3 dB bandwidth +/– 91 kHz
Sensitivity min. – 102 dBm (GSM1800 norm.cond. only)
Total typical receiver voltage gain ( from antenna
to RX ADC ) 86 dB
Receiver output level ( RF level –95 dBm ) 230 mVpp, single–ended I/Q signals to RX ADCs
Typical AGC dynamic range 83 dB
Accurate AGC control range 60 dB
Typical AGC step in LNA 30 dB GSM1800 25 dB EGSM
Usable input dynamic range –102 ... –10 dBm
RSSI dynamic range –110 ... –48 dBm
Compensated gain variation in receiving band +/– 1.0 dB