Functional Description - Panasonic EB-G60 Service Manual

5.2.3. Functional Description

Txin Txqn
Txip Txqp
ÖÖ . Ö
Tx-VCO
UHF-VCO
(LO)
Transceiver
CX74017
PCO1
PCO2
TXENA
RXENA
SXENA
Rxin
Rxip
Rxqn
Rxqp
G60 is model using DCR (Direct Conversion Receiver) in it that eliminates the need for IF components (IF SAW), the
transceiver also integrates TXVCO and LO, and PA module integrate PAC.
1.
PCO1
0
0
1
2.
TXENA
1
0
X
3.
VC1 (Pin2)
0
0
0
TxGSM
Dual-band
PA
TxDCS
PA-
Fref
Controller
VCTCXO
13MHz
U106
APC
AFC
LE
CLK
Data
U100
Figure 5.3. : Functional Description
PCO2
0
0
0
RXENA
0
1
X
VC2 (Pin4)
1
0
0
Table 5.3
TxGSM
TxDCS
Dual-band
TR switch
PA module
RF3140
U104
VC1 VC2 VC3
Select
No action
EGSM
DCS
SXENA ACTION
1 TX
1 RX
0 RF off
VC3 (Pin8)
0
1
0
– 5–7 –
ANT
U111
ACTION
EGSM TX
DCS
EGSM/DCS RX