Panasonic EB-X100, Service Manual, Page: 20 / 92

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5.1.3. Functional Description
5.1.4. Transmitter
■
Introduction
This section provides a technical description of the transmitter circuits of the Main PCB. A circuit diagram of the whole system is
provided in the Service Manual.
■
Frequency Plan
The frequency plan is shown below:
Figure 5.2. Synthesizer Block Diagram
TX Frequency TX IF TX UHF LO
E-GSM 900 880 MHz - 915 MHz 98.3 MHz - 114.4 MHz 1474.3 MHz -1543.8 MHz
GSM 1800 1710 MHz - 1785 MHz 90.3 MHz - 104.8 MHz 1354.7 MHz - 1414.5 MHz
GSM 850 824 MHz - 849 MHz 82.42 MHz - 105.55 MHz 1359.93 MHz - 1424.922 MHz
GSM 1900 1850 MHz - 1910 MHz 97.37 MHz - 112.34 MHz 1460.68 MHz - 1516.606 MHz
RX RX LO
E-GSM 900 925 MHz - 960 MHz 925.2 MHz -959.8 MHz
GSM 1800 1805 MHz - 1880 MHz 1805.2 MHz - 1879.8 MHz
GSM 850 869 MHz - 894 MHz 869.2 MHz - 839.8 MHz
GSM 1900 1930 MHz - 1990 MHz 1930.2 MHz - 1989.8 MHz
PFD
PFD
R div.
M div.
26 MHz
I
Q
MAIN PLL
TX LB VCO
= TX GSM850 / GSM900
TX HB VCO
= TX GSM1800 / GSM1900
toward PA
PAD
L
divider
N divider
MAIN VCO 2
@3.80 GHz
MAIN VCO 1
@3.37 GHz
Programmable
Main loop filter
90
°
toward RX mixers