Panasonic KX-TGP500B09 / KX-TPA50B09 (serv.man2) Service Manual ▷ View online
9
KX-TGP500B09/KX-TPA50B09
4.2.4.
Signal Flowchart in the Radio Parts
Reception
A voice signal from TEL line is encoded to digital data "TXDATA" (*1) by DSP (IC504) 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.
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"(*1).
DSP (IC504) converts RXDATA into a voice signal and outputs it to speaker.
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"(*1).
DSP (IC504) 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.
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.
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.
Note:
(*1) TXDATA and RXDATA are bundled to one signal as "RXTXDATA" of DSP(IC504) in base unit.
10
KX-TGP500B09/KX-TPA50B09
4.3.
Explanation of Link Data Communication
4.3.1.
Calling
4.3.2.
To Terminate Communication
4.3.3.
Ringing
11
KX-TGP500B09/KX-TPA50B09
4.4.
Block Diagram (Base Unit_Main)
PHY
X501
DC-jack
13
.824
M
H
z
PD
N
RE
S
E
T
IC
701
IC
504
KX-TGP500 BLOCK DIAGRAM
(Base Unit_Main
)
LED
SPI
DECT
RF
KEY
4M
Atmel
128M
SD_RAM
64Mbit
Program Flash
IC
503
IC
502
IC
501
Reset
1.3V
Reg
IC
301
IC
505
VDD
25M
Hz
IC
401
X
401
PDN
3.3V
DCDC
IC
303
D305
MII
RJ45
with Trans
JK401
VCC
12
KX-TGP500B09/KX-TPA50B09
4.5.
Block Diagram (Base Unit_RF Part)
V_PA
V_RF
DVCC
Note:
(*1) A
ntenna Type: wired dipole antenna
K
X-TGP500 BLOCK DIAGRAM (Base Unit_RF Part)
PLL
13.
824 MHz
IC701
ANT1 (
*1)
ANT2 (
*1)
Cont
ro
l
Logi
c
Mi
x
e
r
A/
D
Demodulator
delta-sigma Modulator
D781
D771
BCLK
SYN_OUT
SY
N_EN
SY
N_CLK
SY
N_DATA
SLOT_CTROL
RADI
O_EN
RXTX
DATA
RF_RSTN
Divider
1.5
DSP
IC504
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