User Guide

NSW-4
Disassembly & Troubleshooting
PAMS Technical Documentation
Page 20
Issue 1 Final
Draft 08/00
 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 regu-
lators
VREF CCONT EROTUS Voltage 1.478 1.500 1.523 V Reference volt-
age for EROTUS
RFTEMP 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 0.5 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 0.7 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
MODE MAD 1Ghz PA
bias
switch
Voltage 0 2.85 V “0” AMPS
“1” TDMA
IF2AP/
IF2AN
EROTUS COB-
BA_D
Voltage/Fre-
quency
0.6 /
450
Vpp /
kHz
Differential limit-
er output to
DEMO–FM de-
modulator
IF2DP /
IF2DN
EROTUS COB-
BA_D
Voltage/Fre-
quency
170 /
450
1400 mVpp
/ kHz
Differential
IF2–signal to RX
A/D–converter
SENA1 MAD EROTUS Logic high ”1” 2.0 2.85 V 1 Ghz PLL en-
able
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