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SERVICE MANUAL
7-9-2-2. Check the Operating Voltage of the QPSK Demodulator IC as follows.
7-9-2-3. Check whether I2C Control of the QPSK Demodulator works properly
figure 7-9-2-2. SDA, SCL signal wave form
7-9-2-3. Check the TP107, ADC Sampling Clock as follows.
figure 7-9-2-3. ADCLK signal wave form
S-00-005(96.03.27)
3.3VD
: Pin 2 of U104
3.3VA
: Pin 2 of U105
as follows
SDA
: TP108
SCL
: TP106
REV.1
Document No
Date of Origin
Date of REV
Vp-p : 3.3V
200us
20ns
PAGE REV.
0
51-L-DSR004
98-10-21
SDA
SCL
ADCLK
PAGE
37/102
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