QP-650 Plus Circuit Description
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Circuit Description
1. Power Supply
Power supply of the radio is derived from the battery, which supplies battery B+ through power
switch. U608 supplies 5V (5M) voltage for the control circuit. U607 supplies 3V voltage for the PLL circuit.
And U200 supplies voltage for the transmit(V_TX), receive(V_RX) and vco(V_SAVE) circuit.
Fig. 1 Power Supply Block Diagram
2
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PLL frequency synthesizer
PLL circuit generates the first local oscillator signal for reception and RF signal for transmission.
Fig.2 PLL Block Diagram
Содержание QP-650 Plus
Страница 1: ... 1 QP 650 Plus Service Manual Quantun Electronics LLC ...
Страница 2: ... 2 Revised History No Date Decription Version Note 1 2010 3 9 Issue V0 1A ...
Страница 60: ...QP 650 Plus PC Board View 60 PC Board View QP 650U Plus PCB Top Layer View 1 ...
Страница 61: ...QP 650 Plus PC Board View 61 QP 650 Plus PCB Top Layer View 2 ...
Страница 62: ...QP 650 Plus PC Board View 62 QP 650 Plus PCB Bottom Layer View 1 ...
Страница 63: ...QP 650 Plus PC Board View 63 QP 650 Plus PCB Bottom Layer View 2 ...
Страница 64: ...QP 650 Plus Block Diagram 64 Block Diagram ...
Страница 65: ...QP 650 Plus Schematic Diagram 65 Schematic Diagram RF Section ...
Страница 66: ...QP 650 Plus Schematic Diagram 66 AF Section ...
Страница 67: ...QP 650 Plus Schematic Diagram 67 MCU Section ...
