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50
KX-TG2560B/KX-TG2560S
51.76MHz
SS signal
SS signal
51.76MHz
FM signal
FM signal
PN code
IC920
IC920
19
RXVCO
850MHz
850MHz
3. RF Amp, 1st Mixer
4. Despreader
The receiving signal (spread signal) input from antenna (RXANT1) is passed through FL730 and amplified at Q730,
then led to pin 26
then led to pin 26
of IC750.The signals from pin 26
is mixed internally with RXVCO signal (pin19 of IC750),and
generate the 1st IF signal of 51.76MHz, then it is output from pin 23. The 1st IF signal is limited at Q830 and led to IC800.
The 1st IF signal (spread signal) of 51.76MHz is input to pin 28
of IC800. PN code output from pin 19
of IC920 is input to pin 1
of IC800.
This PN code despreads, and the 1st IF signal (FM signal) is output from pin 26
This PN code despreads, and the 1st IF signal (FM signal) is output from pin 26
of IC800.
Circuit Diagram
Circuit Diagram
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