NSB–6
System Module
PAMS Technical Documentation
Page 40
Issue 1 06/2000
E
Nokia Mobile Phones Ltd.
RF Frequency Plan
HAGAR
PLL
26 MHz
VCTCXO
f/2
f
3520–
3980
MHz
925–960
MHz
880–915
MHz
I–signal
1930–1990
MHz
f
f/2
f
f/2
f
f/2
1850–1910
MHz
Q–signal
I–signal
I–signal
I–signal
RX
TX
I–signal
Q–signal
f
f/2
13 MHz
DC characteristics
Regulators
Transceiver has a multi function power management IC at baseband sec-
tion, which contains among other functions, also 7 pcs of 2.8 V regulators.
All regulators can be controlled individually with 2.8 V logic directly or
through control register. In GSM direct controls are used to get fast
switching, because regulators are used to enable RF–functions.
VREF_2 from CCONT IC and RXREF from COBBA IC are used as the
reference voltages for HAGAR RF–IC, VREF_2 (1.5V) for bias reference
and RXREF (1.2V) for RX ADC’s reference.
Control signals (typical current consumption in different modes)
VXCOPWR
SYNTHPWR
RXPWR TXPWR TXP
Typ. cur-
rent cons.
Notes
L
L
L
L
L
<10 uA
Leakage current ( PA )
H
H
L
L
L
28 mA
Synthesizer
H
H
H
L
L
81 mA
RX active
H
H
L
H
L
138 mA
TX active except PA
H
H
L
H
H
1900 mA TX active, full power
