Nokia NSB-9 Service Manual page 31

CCS Technical Documentation
Table 9: AC and DC Characteristics of RF-Baseband Analogue Signals
Signal name From
VCTCX
VCTCXO
O
VCTCXOGnd VCTXO
RXI/RXQ HAGAR
TXIP / TXIN UEM
TXQP / TXQN UEM
AFC UEM
Issue 1 04/03
To Parameter
UPP Frequency
Signal
amplitude
Input
Impedance
Input
Capacitance
Duty Cycle
UPP DC Level
UEM Differential volt-
age swing
(static)
DC level
HAGAR Differential volt-
age swing
(static)
DC level
Source Imped-
ance
HAGAR Same spec as for TXIP / TXIN
VCTCXO Voltage Min
Max
Resolution
Load resistance
and capacitance
Nokia Corporation
System Module and User Interface
Min Typ Max Unit
13 26 MHz
0.2 0.8 2.0 Vpp
10 kohm
10 pF
40 60 %
0 V
1.35 1.4 1.45 Vpp
1.3 1.35 1.4 V
2.23 2.48 Vpp
1.17 1.20 1.23 V
200 ohm
0.0 0.1 V
2.4 2.6
11 bits
1 kohm
100 nF
NSB-9
Function
High stability
clock signal for
the logic circuits,
AC coupled.
Distorted
sinewave eg.
sawtooth.
Ground for refer-
ence clock
RX baseband sig-
nal.
Programmable
voltage swing.
Programmable
common mode
voltage.
Between TXIP-TXIN
Differential quad-
rature phase TX
baseband signal for
the RF modulator
Automatic fre-
quency control sig-
nal for
VCTCXO
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