參數(shù)資料
型號(hào)： TB1274BFG
元件分類(lèi)： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： 10 X 14 MM, 0.80 MM PITCH, QFP-48
文件頁(yè)數(shù)： 24/37頁(yè)
文件大?。?/td> 839K
代理商： TB1274BFG
TB1274BFG
2005-08-18
30
NOTE
ITEM
MEASURING METHOD
LUMINANCE SECTION
COMMON TEST CONDITION FOR LUMINANCE SECTION
①
Set the BUS data as Y1/C1 input is selected.
Y1
Chroma trap attenuation
①
Set the BUS data as C TRAP is ON.
②
Input signal 1(f0=3.58MHz(NTSC), V0=0.5V, VS=0V) to pin 1(CVBS1/Y1-IN).
③
Measure the amplitude at pin 21(Y-OUT) with the chroma trap being turned on(VTon) and off(VToff).
Calculate the attenuation value as following equation.
Gtr3=20log(VToff / VTon)
④
Calculate the following value in the same way as② to ③.
Gtr4 : f0=4.43MHz(PAL)
GtrS : f0=4.43MHz(SECAM)
GtrSD : f0=5.0MHz(SECAM, S-D TRAP = ON)
Y2
Cb, Cr offset level 1
①
Input PAL Black Burst signal to pin 1(CVBS1/Y1-IN).
②
Monitor Cb or Cr out (pin 22 or 23), and measure voltage between blanking period and picture period as
Offs1MAIN.
③
Set the BUS data as RGB SELECT is YcbCr1 (or RGB1), and measure Offs1YcbCr1(or OffsRGB1) in the
same way as ②.
Y3
Cb, Cr offset level 2
①
Set YS1(pin 24)=2V and Cb2, Cr2-in : no-signal input.
②
Monitor Cb or Cr-OUT(pin 22 or 23), and measure voltage between blanking period and picture period as
Offs2.
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