NHM–7
System Module & UI
PAMS Technical Documentation
Page 13
Issue 1 10/2001
Nokia Corporation
AC and DC Characteristics of RF–BB voltage supplies
Signal
name
From
To
Parameter
Min
Typ
Max
Unit
Function
VBAT
Battery
PA & UEM
Voltage
2.95
3.6
4.2
V
Battery supply.
Cut–off level of
DCT4 regulators is
Current
2000
mA
DCT4 regulators is
3.04V. Losses in
pcb tracks and
ferrites are taken
Current drawn by
PA when ”off”
0.8
2
uA
ferrites are taken
account to minimum
battery voltage
level.
VR1A
UEM
VCP
Voltage
4.6
4.75
4.9
V
Supply for varactor
f
UHF VCO
Current
2
10
mA
for UHF VCO
Current
2
10
mA
tuning.
Noise density
240
nVrms/
sqrt(Hz)
tuning.
VR2
UEM
VRF_TX
Voltage
2.70
2.78
2.86
V
Supply for part of
t
it t i
Current
65
100
mA
transmit strip.
Supply for TX
Noise density
f=100Hz
f>300Hz
120
nVrms/
sqrt(Hz)
Su
ly for TX
I/Q–modulators.
VR3
UEM
VCTCXO
Voltage
2.70
2.78
2.86
V
Supply for VCTCXO
Current
1
20
mA
Noise density
240
nVrms/
sqrt(Hz)
VR4
UEM
VRF_RX
Voltage
2.70
2.78
2.86
V
Supply for Hagar
RX; preamp., mixer,
Current
50
mA
DTOS
Noise density
d
d
20dB/d
Noise density
f = 6 Hz
f = 60 Hz
f
600Hz
5500
550
55
nVrms/
sqrt(Hz)
decades 20dB/dec
from 6Hz to 600Hz.
From f >600Hz
maximum noise
density
55nV
RMS
/
√
Hz.
VR5
UEM
VDIG,
VPRE
Voltage
2.70
2.78
2.86
V
Supply for Hagar
PLL di id
LO
VPRE,
VLO
Current
50
mA
PLL; dividers, LO–
buffers, prescaler,
VLO
Noise density
BW=100Hz...
100kHZ
240
nVrms/
sqrt(Hz)
buffers, rescaler,
VR6
UEM
VBB
Voltage
2.70
2.78
2.86
V
Supply for Hagar
BB
d LNA
Current
50
mA
BB and LNA
Noise density
BW=100Hz...
100kHz
240
nVrms/
sqrt(Hz)
Summary of Contents for NHM-7 series
Page 212: ......