Panasonic KX-FG2452CX Service Manual page 64

KX-FG2452CX
6.14.5.12. 2.4GHz Mod/Demod Circuit (RF Part)
IC901 incorporates all of the modulation and demodulation functions. TX Digital data (TX_DATA) from DSP is supplied to pin 27 of
IC901, and then 2.4GHz TX modulated signal is output from pin1. This TX signal is filtered by BPF (FL901) and supplied to
Antenna. 2.4GHz RX signal from the Antenna is filtered by BPF (FL901) and supplied to pin4 of IC901, then demodulated signal
(RX_DATA) comes out from pin 16. At the same time, RSSI (Received Signal Strength Indicator) outputs from pin 14. Reference
clock (13.824MHz) from DSP block is supplied to pin 11 of IC901. VBATT2/RF_2.5V supplies 2.5V regulated voltage.
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