User Guide

CCS Technical Documentation System Module and User Interface
NEM-2
Issue 1 07/03 Copyright Nokia. All rights reserved.. Page 19
VR1A UEM HELGO Voltage 4.6 4.75 4.9 V Charge pump output
for SHF VCO tuning.
Current 2 10 mA
Noise density 240 nVr
ms/
sqrt(
Hz)
VR2 UEM HELGO Voltage 2.70 2.78 2.86 V Supply for
I/Q-modulators, buff-
ers, ALS
Current 65 100 mA
Noise density
f=100Hz
f>300Hz
120 nVr
ms/
sqrt(
Hz)
VR3 UEM VCTCXO,
HELGO
Voltage 2.70 2.78 2.86 V Supply for VCTCXO,
PLL digital parts
Current 1 20 mA
Noise density 240 nVr
ms/
sqrt(
Hz)
VR4 UEM HELGO Voltage 2.70 2.78 2.86 V Supply for Helgo RX;
PA bias blocks
Noise density dec-
ades 20dB/deg from
6Hz to 600 Hz. From
f>600Hz max. noise
density nVrms/
sqrt(Hz)
Current 50 mA
Noise density
f=6Hz
f=60Hz
f>600Hz
5500
550
55
nVr
ms/
sqrt(
Hz)
VR5 UEM HELGO Voltage 2.70 2.78 2.86 V Supply for Helgo PLL;
dividers, LO-
buffers, prescaler,
Current 50 mA
Noise density
BW=100Hz...
100kHZ
240 nVr
ms/
sqrt(
Hz)