Q-67107-H5236 查看數據表（PDF） - Micronas

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Q-67107-H5236

PRIMUS Powerful Scan Rate Converter including ultistandard Color Decoder

Micronas 

SDA 9402/02S(A31)

Preliminary Data Sheet 02.2001

System Description

equals 511 and means an overflow of the ADC. Other settings react for a lower level.

The gain only becomes higher when a change of the channel is detected or is manually

reset by AGCRES. AGCFRZE holds the current AGC value. With AGCADJ1 and

AGCADJ2, both ADCs are gain controlled manually.

Gain Control Characteristic

1.6

1.5

1.4

1.3

1.2

1.1

1

0.9

0.8

0.7

0.6

0.5

0.4

0

8

16

24

32

40

48

56

64

AGCADJ1, AGCADJ2 (I²C)

Figure 5-2 CVBS ADC characteristic

The conversion range (CR) is bigger than the signal range (SRY, SRC) leaving a

headroom for overshoots (Figure 5-3)

511

upper headroom

511

upper headroom

442

446

white

144

16

0

Figure 5-3

256

black

64

0

lower headroom

CVBS, Y and C amplitude characteristics

Micronas

5-18

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