User Guide

CCS Technical Documentation System Module LG4 and Grip Module LS4
Issue 2 11/02 ¤Nokia Corporation Page 41
Voltage Supplies and References
Signal
name
From To Parameter Min Typ Max Unit Function
VBAT Bat-
tery
PA &
UEM
Voltage 2.95 3.5 5.15 V Battery supply. Cut-off
level of DCT4 regulators
is 3.04V. Losses in PWB
tracks and ferrites are
taken account to mini-
mum battery voltage
level.
Current 200
0
mA
Current drawn by
PA when ”off”
0.8 2 mA
VR1 UEM VCP Voltage 4.6 4.75 4.9 V Supply for varactor for
UHF VCO tuning.
Current 2 10 mA
Noise density 200 nVrms/
sqrt(Hz
)
VR2 UEM VRF_TX Voltage 2.70 2.78 2.86 V Supply for part of trans-
mit strip. Supply for TX
I/Q-modulators.
Current 65 100 mA
Noise density
f=100Hz
f>300Hz
80
55
nVrms/
sqrt(Hz)
VR3 UEM VCTCXO Voltage 2.70 2.78 2.86 V Supply for VCTCXO
Current 1 20 mA
Noise density 200 nVrms/
sqrt(Hz
)
VR4 UEM VRF_RX Voltage 2.70 2.78 2.86 V Supply for Hagar RX;
preamp., mixer,
DTOS
Noise density should
have -20dB/G slope after
10kHz corner frequency
Current 50 mA
Noise density
f=100..10kHz
f=100kHz
200
20
nVrms/
sqrt(Hz)
VR5 UEM VDIG,
VPRE,
VLO
Voltage 2.70 2.78 2.86 V Supply for Hagar PLL;
dividers, LO-
buffers, prescaler,
Current 50 mA
Noise density
BW=100Hz to
100kHZ
200 nVrms/
sqrt(Hz
)
VR6 UEM VBB Voltage 2.70 2.78 2.86 V Supply for Hagar BB and
LNA
Current 50 mA
Noise density
BW=100Hz to
100kHz
200 nVrms/
sqrt(Hz
)