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12
KX-UDT111RU
4.2.11. RF Circuit
Reception
A digital voice signal from LAN is received as "TX_DATA" (*1) by DMW in a cell station.
Then TX_DATA goes to RF part, and it's modulated to 1.9 GHz RF signal. The RF signal is amplified and fed to a selected
antenna by antenna diversity .
Then TX_DATA goes to RF part, and it's modulated to 1.9 GHz RF signal. The RF signal is amplified and fed to a selected
antenna by antenna diversity .
As for a portable station, RF signal of cell station is received in two antennas.
RFIC(IC1) of portable station compares RF signal levels from cell station and selects the antenna to be used.
RX signal in the selected antenna is amplified and down-converted to 864 kHz IF signal, then demodulated to digital data
"RX_DATA".
RFIC(IC1) converts RX_DATA into a voice signal and outputs it to speaker.
RFIC(IC1) of portable station compares RF signal levels from cell station and selects the antenna to be used.
RX signal in the selected antenna is amplified and down-converted to 864 kHz IF signal, then demodulated to digital data
"RX_DATA".
RFIC(IC1) converts RX_DATA into a voice signal and outputs it to speaker.
Transmission
A voice signal from microphone is encoded to digital data "TX_DATA" by RFIC(IC1) in a portable station.
TX_DATA goes to RF part, and it's modulated to 1.9 GHz RF signal. The RF signal is amplified and fed to a selected antenna by
antenna diversity.
TX_DATA goes to RF part, and it's modulated to 1.9 GHz RF signal. The RF signal is amplified and fed to a selected antenna by
antenna diversity.
As for a cell station, RF signal is received in two antennas.
RFIC of cell station compares RF signal levels from portable station and selects the antenna to be used.
RX signal in the selected antenna is amplified and down-converted to 864 kHz IF signal, then demodulated to digital data
"RX_DATA".
DMW is received RX_DATA (*1) as a voice signal from portable station and outputs it to LAN.
RFIC of cell station compares RF signal levels from portable station and selects the antenna to be used.
RX signal in the selected antenna is amplified and down-converted to 864 kHz IF signal, then demodulated to digital data
"RX_DATA".
DMW is received RX_DATA (*1) as a voice signal from portable station and outputs it to LAN.
Note:
(*1) TX_DATA and RX_DATA are bundled to one signal as "RXTXDATA" of DMW in cell station.
TX_RF
RX_RF
Antenna diversity
TX_RF
RX_RF
VBAT
LNA_INN
ANT2
ANT1
RX_SW
TX_SW
BAL_OUT1
C3
BAL_OUT2
GND
LNA_INP
VCC_PA
ATSTN
ATSTP
C1
RSTN
38
TEST
39
RX_SW
40
LNA_INN
30
VCC_FE_IF
31
VCC_PA
32
BAL_OUT2
33
BAL_OUT1
41
LNA_INP
42
ATST_N
43
ATST_P/EXT_LNA
44
RSTN
45
VCC_VCO
46
ON_OFF
47
ON_OFF_OUT
48
IF_T_DATA
49
IF_MLSE
50
IF_RX1
51
IF_NPORST
36
GND_RF
37
ANT2
34
TX_SW
35
ANT1
TO RF BLOCK
IC1
GND
RX_SW
LNA_INP
TX_SW
BAL_OUT2
LNA_INN
GND
GND
GND
GND
GND
GND
GND
GND
ANT2
ANT1
GND
GND
GND
GND
ANT_TP2
1
2
ANT_TP1
1
2
BAL_OUT1
GND
GND
VCC_PA
GND
GND
GND
C36
L32
C55
GND
CL1
C39
C43
C48
C50
C31
C33
GND
GND
D50
GND
D51
GND
L38
L42
C52
GND
GND
L30
L46
GND
GND
L44
R50
C32
L33
C47
L31
C41
C42
L35
L36
L45 10p
L43
C30
C38
C53
C37
C35
C34
L34
C46
C45
C44
ANT2(Main)
GAP
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