Panasonic KX-HCM280, Руководство по обслуживанию

Страница: 70 / 182

3. Gamma correction for R/G/B signal respectively
4. Color-Difference matrix to convert to the color-difference signal
(R-Y, B-Y signal) and to adjust chroma/phase
5. Modulation process in accordance with NTSC standard
6. D/A converts for output
Additionally, the detection process for AE (Auto Exposure), AF (Auto Focus) and AWB (Auto
White Balance) is made for automatic control. The detection data is read by the serial signal in
CAMERA CPU.
<CCD drive signal and Timing signal generation>
Outputs CCD drive signal [horizontal (H1, H2, RG) and vertical (V1~V4)] and Timing signal
[Composite Synchronization signal, CAMERA CPU interrupt timing signal (VD, EP1, EP2) and
signal for CDS IC (SP1, SP2, ADCLK, OBP)]. The signal timing is set by the serial signal in
CAMERA CPU.
- V Driver (IC802)
Power-supply voltages: -5V, +3.3V, +12V
Package: 20pin SOP
Generates CCD vertical drive signal from CCD vertical drive timing
signal in VIDEO DSP (IC803).
CCD vertical drive timing signal with +3.3Vp-p is converted to
binary (-5V~0V) and to ternary (-5V~0V~+12V), and is output as
V1~V4 signal.
- VIDEO AMP (IC804)
Power-supply voltages: +3.3V
Package: 8pin SOP
Y signal and C signal that are output from VIDEO DSP (IC803) will
input via the following route, respectively.
Y signal: IC803 46pin LPF (L808) Q801 Q803
C signal: IC803 42pin BPF (L809) Q802 Q804
Each signal is combined to take a form of composite VIDEO signal
and amp12dB, and they are output from 3pin via 75 driver.
70