User Guide

NEM-2
System Module and User Interface CCS Technical Documentation
Page 20 Copyright Nokia. All rights reserved. Issue 1 07/03
Table 2: AC and DC Characteristics of DCT4 RF-Baseband Digital Signals
VR6 UEM HELGO Voltage 2.70 2.78 2.86 V Supply for Helgo BB
and LNAs
Current 50 mA
Noise density
BW=100Hz...
100kHz
240 nVr
ms/
sqrt(
Hz)
VR7 UEM SHF VCO Voltage 2.70 2.78 2.86 V Supply for SHF VCO
Current 30 mA
Noise density
100Hz<f<2kHz
2kHz<f<10kHz
10kHz<f<30kHz
30kHz<f<90kHz
90kHz<f<3MHz
70
55
35
30
30
nVr
ms/
sqrt(
Hz)
VrefRF01 UEM HELGO Voltage 1.334 1.35 1.366 V Voltage Reference for
HELGO DCN2
op.amps.
Note: Below 600Hz
noise density is
allowed to increase
20 dB/oct
Current 100 uA
Temp Coef -65 +65 uV/C
Noise density
BW=600Hz...
100kHz
Note
60 nVr
ms/
sqrt(
Hz)
Signal name From To Parameter Input Characteristics Function
Min Typ Max Unit
TXP UPP
(GenIO5)
HELGO ”1” 1.38 1.88 V Power
amplifier
enable
”0” 0 0.4 V
Load Resistance 10 220 kΩ
Load Capacitance 20 pF
Timing Accuracy 1/4 symbol
TXA UPP
(GenIO7)
HELGO ”1” 1.38 1.88 V Power con-
trol loop
enable
”0” 0 0.4 V