User Guide

CCS Technical Documentation 7 - System Module & UI
Company Confidential NMM-3
Issue 1 (11/2003) Copyright  2003 Nokia Corporation Page 7-41
Company Confidential
WCDMA FUNCTIONAL DESCRIPTION
WCDMA synthesizers
TEX and REX have there own synthesizers. The PLL designs are basically the same and are
copied from HELGO. The loop filters are optimized separately so that the RX synthesizer is
faster than the TX.
The 19.2MHz VCTCXO frequency is used as the reference signal for both synthesizers.
The buffer inside of HELGO is used between baseband and the VCTCXO.
NF (max gain) 9.0 dB (max)
IQ level (differential) 400 mV
ppms
(nominal)
BB 3 dB bandwidth 10 kHz … 2 MHz (tunable)
Table 9: RX main characteristics
Item Value