User Guide

6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
System Module Nokia Customer Care
Page 32 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
Synthesizer
Figure 13 illustrates all three synthesizers and how they interconnect in the system.
Figure 13: Synthesizer system block diagram
RX UHF LO Synthesizer
The RX UHF LO synthesizer generates the first RX LO frequency for the receiver. The
synthesizer has a selectable, dual-modulus 32/33 and 16/17 prescaler (up to 2.5GHz) and
utilizes a phase-frequency detector with a charge pump that sinks or sources currents,
which depends on the phase and frequency differences.
RF_BUS_CLK
RF_BUS_DATA
RF_BUS_EN1X
Reference
Divider
Charge
Pump
4 mA
13-Bit B
Counter
UHF VCO
UHF Synthesizer
LMX2310U
Prescaler
32/33
5-Bit A
Counter
Reference
Divider
Charge
Pump
2 mA
Prescaler
32/33
5-Bit A
Counter
9-Bit B
Counter
Tank
RX VHF VCO
RX VHF Synthesizer
Batman
Charge
Pump
UHF Synthesizer
JUPITER D1
UHF RX LO
SYNTH_LE
VCTCXO
19.2 MHz
AFC
UPP
UEM
ALFRED
PCS_Cell
Prescaler
Serial Control Logic&Registers
Phase
Detector
B counter
A counter
LD
R
counter
Phase
Detector
Phase
Detector
Band
sel
AMPS
Charge
Pump
Charge
Pump
AutoCAL
VCO_CAL
CDMA
VDD BUS
VDD PLL