Nokia NSW-5 Series

NSW-5
Disassembly and Troubleshooting Instructions
PAMS Technical Documentation
Page 26
Issue 1 10/00
 Nokia Mobile Phones Ltd.
Interface signals between RF and BB/DSP
Signal
name
From To Parameter Min Typ Max Unit Function
VBAT Battery RF Voltage 3.1 3.6 5.3 V Supply voltage for
RF and regulators
VREF CCONT EROTUS Voltage 1.485 1.500 1.522 V Reference voltage
for EROTUS
RFTE
MP
RF CCONT Voltage 0
HOT
1.4
ROO
M
TEMP
2.7
COLD
V RF temperature
sensor 47k NTC
to GND
AFC COB-
BA_D
VCTCXO Voltage 0.05 1.1 2.25 V Automatic fre-
quency control
AGC1 Cobba_D EROTUS Voltage 0.7 1.4 V Gain control for
EROTUS RX
AGC
AGC2 MAD RX LNA Voltage 0 2.85 V LNA Gain switch
“1” min 2.0 V
“0” max 0.5 V
PD1 EROTUS VHF VCO Voltage 0
1.0
2.8
1.5
3.3
4.0
2.0
3.8
V
V
V
VCO control
voltage
322.38 MHz
392.46 MHz
PD2 EROTUS 1GHz
UHF VCO
Voltage 1.3 3.5 V 1 GHz
IF2AP/
IF2AN
EROTUS COB-
BA_D
Voltage/Fre-
quency
0.2 /
450
Vpp /
kHz
Differential limiter
output to DEMO–
FM demodulator
IF2DP /
IF2DN
EROTUS COB-
BA_D
Voltage/Fre-
quency
170 /
450
1400 mVp
p /
kHz
Differential
IF2–signal to RX
A/D–converter
SENA1 MAD
EROTUS Logic high ”1” 2.0 2.85 V 1 Ghz PLL enable
Logic low ”0” 0 0.8 V
SDATA MAD
EROTUS Logic high ”1” 2.0 2.85 V Synthesizer data
Logic low ”0” 0 0.8 V
SCLK MAD
EROTUS Logic high ”1” 2.0 2.85 V Synthesizer clock
Logic low ”0” 0 0.8 V
RFC EROTUS COB-
BA_D
Voltage/Fre-
quency
0.2 0.4 /
19.44
1.0 Vpp /
MHz
Clock signal for
the logic circuits
RFCEN MAD CCONT /
PENTA
regulator
Voltage 0 2.85 V “1” min 2.0 V
“0” max 0.4 V