Nokia 6265 Rf Description And Troubleshooting page 51

Nokia Customer Care
VCTCXO:
VCTCXO:
19.2 MHz clocks: 19.2 MHz clocks:
-9 dBm -9 dBm
to UHF PLL to UHF PLL
CLK19M2_TIKU CLK19M2_TIKU
to BB to BB
F_REF_RX F_REF_RX to RX to RX
Back-End IC Back-End IC
F_REF_TX F_REF_TX
to TX IC to TX IC
F_REF_TX F_REF_TX to to
Bluetooth Bluetooth
UHF PLL IC
VPLL:
VR1A: VR3:
2.8 V
4.8 V
2.8 V
Issue 1 11/2005
VCTCXO
VR4:
2.8 V
UHF LO: UHF LO:
PCS_CEL_LO input to RX Front-End IC PCS_CEL_LO input to RX Front-End IC
CELL CH 384: 1009.62MHz > CELL CH 384: 1009.62MHz >
PCS CH 600: 2088.1MHz : > PCS CH 600: 2088.1MHz : >
Figure 41: VCTCXO and UHF Synthesizer test points
©2005 Nokia Corporation
6265/6265i/6268 (RM-66)
RF Description and Troubleshooting
Lock voltage:
DC between 0.8 and 3.4 V,
S/B 1.2V @ center frequency
Dual band VCO
–9 dBm –9 dBm
-16 dBm -16 dBm
Company Confidential
AFC voltage:
DC between 1 and 3 V
1.3 V for PDM 0
0.8 V for PDM –1024
2.5 V for PDM 1023
BAND_SEL_VCO
0 VDC
Cell
2.8 VDC
PCS
PCS_CEL_LO return to UHF PLL
–11 dBm; PCS –18 dBm
Cell
Page 51