NSW-5
System Module UT5U
PAMS Technical Documentation
Page 39
Issue 1 10/00
Nokia Mobile Phones Ltd.
Parameter Min Typ/
Nom
Max Unit
Gain, (LNA + filter + mixer) 19 21 24 dB
Gain, LNA gain disabled 4 dB
Gain step 14 17 dB
Supply Voltage 2.7 2.8 2.9 V
Supply Current (LNA + Mixer) 17 22 mA
TDMA 1900MHz RX Front End
Receiver front end is integrated in the IC. It has RF amplifier with a gain
step and an active mixer. RX interstage filter is a dielectric filter.
Parameter Min Typ/
Nom
Max Unit
Gain, (LNA + filter + mixer) 19 21 23 dB
Gain, LNA gain disabled 4 dB
Gain step 14 17 dB
Supply Voltage 2.7 2.8 2.9 V
Supply Current (LNA + Mixer) 28 33 mA
1st IF Amplifier
The 1st IF filter is a SAW filter. The function of the filter is to provide at-
tenuation for the intermodulating signals
Analog IF parts
Analog mode IF–parts are included in EROTUS. Functional blocks: IF1
amplifier, a 2x–multiplier for LO signal, a mixer and a limiter amplifier
with RSSI. Specifications for analog mode IF–parts are in table 5. IF2
filter is a double 450 kHz ceramic filter.
Parameter Min Typ/
Nom
Max Unit
Supply voltage 2.7 2.8 2.9 V
IF1 amp + mixer current cons. 6.5 8 mA
(+0.6 mA in d–mode)
6x freq. multipl. current cons. 1.8 2 mA
Limiter + RSSI current cons. 1.4 2.5 mA
Power up time 3.5 ms
RF input impedance single end 3.5 4//tbd 5 kohm//pF
RF input frequency range 116.19 MHz
Noise figure, IF1 amp + mixer 8 dB, RF = 116 MHz
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