analog framing造句

:: : : : In countries using the NTSC television system, such as the United States, a color bar test signal is still used as a reference to adjust analog frame synchronizers to fine tune four basic video levels to match the transmitted NTSC signal : Video level ( contrast on home receivers ), black level ( brightness ), chroma saturation ( color ) and chroma phase ( hue or tint ).
It's difficult to find analog framing in a sentence. 用analog framing造句挺难的