Panasonic KX-TG9341T Service Manual - Page 8
Signal Flowchart in the Radio Parts
UPC - 037988479504
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KX-TG9341T/KX-TG9342T/KX-TG9343S/KX-TG9343T/KX-TG9344T/KX-TGA931S/KX-TGA931T 4.1.3. Signal Flowchart in the Radio Parts Reception A voice signal from TEL line is encoded to digital data "TXDATA" by DSP (IC501) in a base unit. Then TXDATA goes to RF PART, and it's modulated to 1.9 GHz. The RF signal is amplified and fed to a selected antenna. As for a handset RF, RF signal is received in two antennas. RFIC (IC701) compares RF signal levels and selects the antenna to be used. Then RFIC down-converts to 864 kHz IF signal from RX signal in the selected antenna, and demodulates it to digital data "RXDATA". DSP (IC501) converts RXDATA into a voice signal and outputs it to speaker. Transmission A voice signal from microphone is encoded to digital data "TXDATA" by DSP (IC501) in a handset. Then TXDATA goes to RF PART, and it's modulated to 1.9 GHz. The RF signal is amplified and fed to a selected antenna. As for a base unit RF, RF signal is received in two antennas. RFIC (IC701) compares RF signal levels and selects the antenna to be used. Then RFIC down-converts to 864 kHz IF signal from RX signal in the selected antenna, and demodulates it to digital data "RXDATA". DSP (IC501) converts RXDATA into a voice signal and outputs it to TEL line. 8