Nokia NHM-7 series, Service Manual, Page: 28 / 212

NHM–7
System Module & UI
PAMS Technical Documentation
Page 16 Issue 1 10/2001
Nokia Corporation
Function Unit Max Typ Min Parameter To From Signal name
TXIP / TXIN UEM RF–IC Differential voltage
swing (static) 2.23 2.48 Vpp Programmable
voltage swing.
Programmable
DC level 1.17 1.20 1.23 V
Programmable
common mode
voltage
Source
Impedance 200 ohm
voltage.
Between
TXIP–TXIN
TXQP /
TXQN UEM RF–IC Same spec as for TXIP / TXIN Differential
quadrature phase
TX baseband
signal for the RF
modulator
AFC UEM VCTCXO Voltage Min
Max 0.0
2.4 0.1
2.6 V Automatic
frequency control
i l f
Resolution 11 bits
signal for
VCTCXO
Load resistance
and capacitance 1
100
kohm
nF
Step settling time 0.2 ms
Aux_DAC
(TxC) UEM RF Voltage Min
Max
2.4
0.1 V Transmitter power
control
Source
Impedance 200 ohm
Resolution 10 bits
Noise density
BW=100Hz...
100kHz 800 nVrms/
sqrt(Hz)
NOTE; Assumed
power control
opamp G=1
Temp Coef –65 +65 uV/C
o am G 1
RFTemp RF UEM Voltage at –20
o
C 1,57 V Temperature
f RF
Voltage at +25
o
C 1,7
sensor of RF.
Voltage at +60
o
C 1,79
Vbase RF UEM Voltage 2.7 V Detected voltage
from PA power
level sensing unit
External Signals and Connections
UI (board–to–board) connector
Pin Signal Min Nom Max Condition Note
1 SLOWAD(2) 1.5V
0.1V 2.7V
1.0V Flip closed
Flip open used for flip
identification
2 VBAT 3.0V 3.6V 4.2V Battery voltage
for leds
3 ROW(4) 0.7xVIO
0 1.8V
0.3xVIO High
Low Keyboard ma-
trix row 4