DOWNLOAD Panasonic KX-TC1868B / KX-TC1871B / KX-TC1872B Service Manual ↓ Size: 2.77 MB | Pages: 87 in PDF or view online for FREE

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KX-TC1868B KX-TC1871B KX-TC1872B
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87
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2.77 MB
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Service Manual
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Device
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kx-tc1868b-kx-tc1871b-kx-tc1872b.pdf
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Panasonic KX-TC1868B / KX-TC1871B / KX-TC1872B Service Manual ▷ View online

9.2. Test mode flow chart for Handset
(*1) See 9.5. Handset Reference Drawing
(*2) Special check method for Handset individually.
37
KX-TC1868B / KX-TC1871B / KX-TC1872B
9.3. Adjustment X101
IN case of SS system, Carrier signal frequency directly by Frequency counter, can not be measured because sending signal is
spread by PN code.
So, the confirmation and adjustment is made under the Continuous Send mode of TEST MODE.
Adjust the TX carrier(CW) frequency on the RF unit.
Equipment: Frequency counter
TP for adjustment: TP_ANT
Adjustment point: VC101 (RF unit)
Adjustment range: 906.000 ± 0.002 MHz (1ch)
9.4. Base Unit Reference Drawing
(COMPONENT VIEW)
ANT GND
ANT
Line A
Line B
VC101
10ch
1ch
TEST
38
KX-TC1868B / KX-TC1871B / KX-TC1872B
9.5.
 Handset
Reference
Drawing
HANDSET
(COMPONENT VIEW)
ANT GND
100
MIC
MIC
TEST 
PULL UP
10
10
ANT
VC101
SP
SP
+   -
+   -
39
KX-
TC186
8B
/
KX-TC
1871B
/
KX-
TC187
2B
10 DESCRIPTION
9.6. FREQUENCY TABLE
10.1. Frequency
The frequency range of 906.00 MHz ~ 923.25 MHz is used. Transmitting and receiving channel between base unit and handset is
same frequency. Refer to the Frequency Table.
10.2. Time Division Duplex (TDD) operation
Transmission/reception between the base unit and handset is performed by time-sharing as shown in Fig. 7. 1 slot time of
transmission and reception is 1mS.Same frequency is used in transmitting and receiving. The figure shows an example; the
frequency of 3ch is used in transmitting between the base unit and handset.
Fig. 7
40
KX-TC1868B / KX-TC1871B / KX-TC1872B
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