Clock Distribution; Rfclk (19.2 Mhz Analog) - Nokia RH-17 Series Troubleshooting - Bb

RH-17
Troubleshooting — BB
Maximum
Regulator
current [mA]
VR1A 10
VR1B 10
VR2 100
VR3 20
VR4 50
VR5 50
VR6 50
VR7 45
A charge pump used by VR1A is constructed around UEM. The charge pump works with
Cbus (1.2 MHz Clk) and gives a 4.75 V regulated output voltage to RF.

Clock Distribution

RFClk (19.2 MHz Analog)

The main clock signal for the baseband is generated from the voltage and temperature
controlled crystal oscillator VCTCXO (G501). This 19.2 MHz clock signal is generated at
the RF and fed to RFCLK pin of UPP.
Page 12
Table 2: RH-17 RF Regulators
Vout [V]
4.75
4.75
2.78
2.78
2.78
2.78
2.78
2.78
Nokia Corporation
CCS Technical Documentation
Notes
Enabled when the receiver is on
Enabled when the transmitter is on
Enabled when the transmitter is on
Enabled when SleepX is high
Enabled when the receiver is on
Enabled when the receiver is on
Enabled when the transmitter is on
Enabled when the receiver is on
Confidential Issue 1 04/2003