User Guide

PAMS Technical Documentation 3. System Module
NSD-5
Issue 1 05/02 Nokia Corporation Page 27
Table 5: RXI, RXQ receive channel characteristics
RF/CAFE CDMA TX Interfaces
The digital transmit channel consists of two equal branches (TXI, TXQ). Each branch has
differential output and the output signal is AC coupled. Table 6 lists some of the transmit
channel characteristics. For more information, consult the CAFE design specification
(Reference 3).
Table 6: TXI, TXQ transmit channel characteristics
Power Management (CCONT) Module and Interface
CCONT Module Functional Description
Power management and distribution is handled by the CCONT ASIC. CCONT is a multi-
Max differential input voltage
range in stopband
VI
sb
1Vpp
Input impedance ZIN 10 13 16 kΩ
Symbol Parameter
Test
conditions
Min Typ Max Unit
Vout Output voltage Range (differential
to the load)
Centered on
Vref = 1.45V
0.97 1.0 1.03 Vpp
IM3 3rd order intermodulation distor-
tion
Two tone test:
430 kHz,
600 kHz
-46 dB
S/N Signal to noise ratio At passband 48 dB
ZL Load impedance 10 kΩ
CL Load capacitance 20 pF
HD Harmonic distortion -48 dB
Noise in 1.25 MHz - 10 MHz fre-
quency band
45 uVrms
F
-0.5dB
Passband 630 kHz
F
stop
Stop band 4.3 MHz
A
stop
Stop band attenuation referred to
pass band gain
35 dB
GD Group delay At passband 430 us
GDD Group delay distortion At passband 80 ns
GDM Group delay match between
branches
10 ns
For I and Q channels Symbol Min Typ Max Unit