Uhf Pll; Uhf Vco - Nokia 9000i Service Manual

RAE/RAK–1N
RF
Parameter
Supply voltage
Control voltage
Supply current GSM
PCN
Operation frequency GSM
PCN
Output power level
Control voltage sensitivity
GSM
PCN
Phase noise, GSM/PCN
f +/– 25 kHz
0
f +/– 200 kHz
0
f +/– 1600 kHz
0
f +/– 3000 kHz
0
Harmonics

UHF PLL

The UHF PLL consists of a UHF VCO, divider, PLL circuit and a loop
filter. The output signal is used for the 1st mixer of the receiver and the
upconversion mixer of the transmitter. In PCN the VCO changes the
frequency according to the RX/TX mode change.
Parameter
Start up settling time
Phase error
Settling time +/– 93 MHz
GSM
PCN
Sidebands offset from carrier
+/– 200 kHz
+/– 400 kHz
+/– 600 kHz
+/– 1.4 MHz...3.0
MHz
> 3.0 MHz

UHF VCO

The UHF VCO uses a bipolar transistor as a active element and a
combination of a chip coil and a varactor diode as a resonance circuit.
Page 3– 24
Table 18. VHF VCO + buffer specification
Minimum Typical /
Nominal
4.2
0.5
Table 19. UHF PLL specification
Minimum Typical /
Nominal
GSM
–80
–87
<–90
<–90
Technical Documentation
Maximum
4.5 4.8
4.0
2.5 5.0
3.5
232
400
170
12
17
–123
–133
–143
–32 –30
Maximum
5
4
800
525
450
PCN
–74 –60
–81 –65
<–90 –70
<–90 –80
–80
Amendment 1 04/97
After Sales
Unit / Notes
V
V
mA
mA
MHz
MHz
mV / 1 kohm
rms
MHz/V
MHz/V
dBc/Hz
dBc/Hz
dBc/Hz
dBc
Unit / Notes
ms
deg. rms
ms
ms
ms
dBc
dBc
dBc
dBc
dBc