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