User Guide

PAMS Technical Documentation System Module
NSB-5
Issue 1 03/01 Nokia Mobile Phones Ltd. Page 65
Receiver Blocks
LNA in CRFU_2a
GSM1900 Receive Interstage Filter
Table 19: LNA requirements
Parameter Minimum
Typical/
Nominal
Maximum Unit/Notes
Frequency range 1930 1990 GHz
Gain 15.5 16.5 17.5 dB
NF 2.0 dB
HP3 -10 -8 dBm
1dB input compression
point (AGC=H)
-18 -12 dBm
Absolute gain reduction
@ 1900...2000MHz
34 dB
Relative step accuracy -2 +2 dB/over temp. range
NF, when AGC-L approxi-
mately 1.8
dB
AGC settling time 1 us
Reverse isolation 18 21 dB
Table 20: Electrical charactistics
Parameter Min Typ Max Unit/notes
Center frequency; fo 1960 MHz
Operating temperature range -30...+85 deg. C
Passband 1930...1990 MHz
Terminating impedance 50 ohms
Insertion loss in passband 2.5 3.0 dB
Amplitude ripple in passband 1.0 dB
Return loss in passband 10 dB
Attenuation relative to fo
DC...900MHz
20 dB
Attenuation relative to fo
900...1100MHz
45 dB
Attenuation relative to fo
1100...1700MHz
20 dB