参数资料
型号: TB1274BFG
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封装: 10 X 14 MM, 0.80 MM PITCH, QFP-48
文件页数: 24/37页
文件大小: 839K
代理商: TB1274BFG
TB1274BFG
2005-08-18
30
NOTE
ITEM
MEASURING METHOD
LUMINANCE SECTION
COMMON TEST CONDITION FOR LUMINANCE SECTION
Set the BUS data as Y1/C1 input is selected.
Y1
Chroma trap attenuation
Set the BUS data as C TRAP is ON.
Input signal 1(f0=3.58MHz(NTSC), V0=0.5V, VS=0V) to pin 1(CVBS1/Y1-IN).
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)
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
Input PAL Black Burst signal to pin 1(CVBS1/Y1-IN).
Monitor Cb or Cr out (pin 22 or 23), and measure voltage between blanking period and picture period as
Offs1MAIN.
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
Set YS1(pin 24)=2V and Cb2, Cr2-in : no-signal input.
Monitor Cb or Cr-OUT(pin 22 or 23), and measure voltage between blanking period and picture period as
Offs2.
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