Panasonic KX-TCD650RUC / KX-TCD650RUF Service Manual ▷ View online
Fig. 27
25
KX-TCD650RUC / KX-TCD650RUF
88..22.. R
RFF S
SE
EC
CTTIIO
ON
N
88..22..11.. B
BLLO
OC
CK
K D
DIIA
AG
GR
RA
AM
M R
RFF S
SE
EC
CTTIIO
ON
N ((H
HA
AN
ND
DS
SE
ETT))
Fig. 28
Loop
filter
CHP
VCO
x2
PD
:R
:N/A
32/33
PLL &
control logic
S&H
Demodulator
Printed
balun
Printed
balun
Printed
PMB6819
Power amp.
PAON
RXON
RX Part
TX Part
voltage
regulator
voltage
regulator
VCC1
VCC
VCC2
Low IF
band pass
filter
VCC
VCC1
TXDA
SYRI
SYDA
SYCL
SYCL
RXDSG
RXDA
RSSI
SYEN
3.6V
PMB6610
DECT transceiver
DRON
PAON
The RF section consists of two main components: The PMB6610 transceiver and the PMB6618 power amp.
In the transceiver the 10.368MHz clock signal SYCL is multiplied to around 1.9GHz using PLL (Phase Locked Loop) control.
The TXDA signal is used to control the modulation of this frequency to 1.87GHz to 1.93GHz.
Received signals are demodulated, filtered and sent to the BBIC via the RXDA line.
In the transceiver the 10.368MHz clock signal SYCL is multiplied to around 1.9GHz using PLL (Phase Locked Loop) control.
The TXDA signal is used to control the modulation of this frequency to 1.87GHz to 1.93GHz.
Received signals are demodulated, filtered and sent to the BBIC via the RXDA line.
26
KX-TCD650RUC / KX-TCD650RUF
99 C
CH
HE
EC
CK
K P
PR
RO
OC
CE
ED
DU
UR
RE
E ((B
BA
AS
SE
E U
UN
NIITT))
99..11.. E
EQ
QU
UIIP
PM
ME
EN
NTT R
RE
EQ
QU
UIIR
RE
ED
D
99..22.. IIN
NIITTIIA
ALL P
PO
OW
WE
ER
R TTE
ES
STTS
S
1. Turn on the 6V supply.
2. DEACTMAC.BAT and CONTTX.BAT check for supply current of 130mA.
3. Check the 3.3V supply rail at TP91. It must be 3.3V ± 0.2V.
4. Check the 2.65V supply rail at TP95. It must be 2.65V ± 0.1V.
2. DEACTMAC.BAT and CONTTX.BAT check for supply current of 130mA.
3. Check the 3.3V supply rail at TP91. It must be 3.3V ± 0.2V.
4. Check the 2.65V supply rail at TP95. It must be 2.65V ± 0.1V.
27
KX-TCD650RUC / KX-TCD650RUF
99..33.. S
SE
ETT TTH
HE
E C
CLLO
OC
CK
K FFR
RE
EQ
QU
UE
EN
NC
CY
Y
1. Turn on the 6V supply.
2. Enter "DEACTMAC" from the PC to switch off the RF unit.
3. Enter "CONTTX 0" to start continuous RF transmission.
4. Enter "RDEEPROM 00 00 0F" to display the first 15 hexadecimal bytes of the EEPROM.
2. Enter "DEACTMAC" from the PC to switch off the RF unit.
3. Enter "CONTTX 0" to start continuous RF transmission.
4. Enter "RDEEPROM 00 00 0F" to display the first 15 hexadecimal bytes of the EEPROM.
The frequency adjustment value is displayed in the first two locations with the most significant byte (MSB) first.
5. Connect the frequency counter probe to TP101, or pin12 of the RF module, to measure the SYRI signal from the BBIC.
6. The clock frequency should be within 10,368,000Hz ± 20Hz. If not then enter "SETFREQ nn nn" where nn nn are the clock
6. The clock frequency should be within 10,368,000Hz ± 20Hz. If not then enter "SETFREQ nn nn" where nn nn are the clock
frequency adjustment values. An increase in the value will lower the clock frequency and vice versa. The maximum value is 01
FF.
FF.
7. Switch off the 6V supply.
99..44.. LLO
OO
OP
PB
BA
AC
CK
K TTE
ES
STTS
S
1. Switch on the 6V supply.
2. Set the CMD60 to MANUAL TEST mode.
3. Set the CMD60 TRAFFIC CARRIER to 0.
4. Invoke the "TESTMODE" batch file from the PC.
5. Press ACCEPT RFPI and SETUP CONNECT on the CMD60.
6. Check the power (NTP): it must be between 20 and 25dBm.
7. Press MODULATION.
8. Set DATA TYPE to FIG 31.
9. Check frequency drift: must be 0 ± 35 kHz/ms.
10. Check frequency offset: must be 0 ± 40 kHz.
11. Check deviation or modulation (max ± B field) with data type "FIG 31": must be 340kHz to 380kHz.
12. Press Menu Up "
2. Set the CMD60 to MANUAL TEST mode.
3. Set the CMD60 TRAFFIC CARRIER to 0.
4. Invoke the "TESTMODE" batch file from the PC.
5. Press ACCEPT RFPI and SETUP CONNECT on the CMD60.
6. Check the power (NTP): it must be between 20 and 25dBm.
7. Press MODULATION.
8. Set DATA TYPE to FIG 31.
9. Check frequency drift: must be 0 ± 35 kHz/ms.
10. Check frequency offset: must be 0 ± 40 kHz.
11. Check deviation or modulation (max ± B field) with data type "FIG 31": must be 340kHz to 380kHz.
12. Press Menu Up "
↑
" on the CMD60.
13. Press POWER RAMP.
14. Check that the burst fits the mask.
15. Press Menu Up "
14. Check that the burst fits the mask.
15. Press Menu Up "
↑
" on the CMD60.
16. Press BER.
17. Obtain the sensitivity by slowly reducing RF LEVEL until the BER falls below 1000ppm. The sensitivity is the RF LEVEL reading
17. Obtain the sensitivity by slowly reducing RF LEVEL until the BER falls below 1000ppm. The sensitivity is the RF LEVEL reading
at this point. It must be < -88dBm.
18. Press Menu Up "
↑
" on the CMD60.
19. Press BEARER RELEASE and switch off the 6V supply.
N
N
Noottee::
These tests can also be repeated on TRAFFIC CARRIERS 5 and 9.
28
KX-TCD650RUC / KX-TCD650RUF
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