Nokia NSW-5 Series, Service Manual

Page: 54 / 278

NSW-5
System Module UT5U
PAMS Technical Documentation
Page 40 Issue 1 10/00
Nokia Mobile Phones Ltd.
Unit Max Typ/
Nom
Min Parameter
Conversion gain @
Rl=1.5kohm 25 33 dB
Conversion gain variation TBD dB, temp -30...+85
°
C
3rd order input intercept point 20 mV
rms
Mixer output frequency range 450 kHz
Mixer out to limiter in isolation 70 dB, @ 450 kHz
Limiter input frequency 450 kHz
Limiter input limiting range 30 uV
rms
Limiter output voltage 0.3 V
pp
Limiter output resistive load 10 k
Ω
Limiter output capacitive load 5 pF
RSSI dynamic range 65 70 dB
RSSI starting level @ LIMIN1 30 60 uVrms
RSSI voltage slope 5 10 mV/dB
RSSI voltage range 0.1 1.5 V
RSSI output capacitive load 50 pF
RSSI output resistive load 500 k
Ω
Freq. multiplier input frequency 19.44 MHz
Input signal spurious levels –10 dBc, (19.44 MHz
spurs)
Input signal level 600 1000 mV
pp
Digital IF parts
The digital IF–parts of EROTUS comprise AGC Amplifer with 57 dB con-
trol range, a mixer and a buffer amplifier for the last IF.
Parameter Min Typ/
Nom
Max Unit
Supply voltage 2.7 2.8 2.9 V
Current consumption 25.2 34.5 mA
RF input frequency range 116.19 MHz
Local frequency (6x19.44 MHz) 116.64 MHz
IF frequency 450 kHz
Max voltage gain, AGC + mixer 47 dB
Min voltage gain, AGC + mixer –10 dB
Noise figure @ max gain 8 dB
Control voltage for min gain 0.7 V
Control voltage for max gain 1.4 1.45 V
AGC gain control slope TBD 90 TBD dB/V