KX-UDS124CE - Panasonic PBX Service Manual (repair manual). Page 10

10

A digital voice signal from LAN is received as "TX_DATA" (*1) by DMW (IC101) 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 .

As for a portable station, RF signal is received in two antennas.
RFIC 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 converts RX_DATA into a voice signal and outputs it to speaker.

A voice signal from microphone is encoded to digital data "TX_DATA" by RFIC 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.

As for a cell station, RF signal is received in two antennas.
RFIC(IC401) 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 (IC101) is received RX_DATA (*1) as a voice signal from portable station and outputs it to LAN.

(*1) TX_DATA and RX_DATA are bundled to one signal as "RXTXDATA" of DMW(IC101) in cell station.

RA401

33

1

2

3

4

5
6
7
8

V_RF

005

ZA1

1

2

3

4

V_PA

005

RF_SLOT_CTRL

003

C419

RF_SYN_DATA

003

C423

RF_TR_DATA

003

C424

C418

R403

33

RF_SYN_OUT

003

C415

L404

RF_RADIO_EN

003

C429

C413

C422

RF_SYN_EN

003

C420

RF_RSTN

003

C426

C417

RF_BCLK

003

C416

RF_SYN_CLK

003

DG

DG

DG

DG

L407

C425

C407

C402

L406

L405

L409

L410

L413

L412

L411

1n

C436

R404

L408

C421

L403

C412

CL404

CL403

CL406

CL405

CN401

1

2

CN402

1

2

C439

L402

L401

C403

C404

C408

C409

C438

C405

C410

C414

C411

C427

C428

C430

C435

C431

C437

C432

C433

C434

C406

C401

IC401

1

VCC_VCO

2

PAEN

9

TX_p

3

ATST_p

4

ATST_n

5

ANT_n

6

TRSW

7

Rxp

8

Rxn

10

TX_n

11

TRSW_n

12

ANT

13

VCC_FE

14

VDD_IF

15

VCC_IF

16

VDD_DIG_b

17

VCC_DIG

18

RSTN

19

VCC_IO

20

TR_DATA

21

RADIOEN

22

SLOT_CTRL

23

SYN_DAT

24

SYN_CLK

25

SYN_EN

26

SYN_OUT

27

VDD_DIG_t

28

DTEST

29

DTST1

30

REF_IN

31

VCC_DIV

32

VCC_PLL

33

PGND

W0.2mm

L10.3mm

W0.3mm

L4.975mm