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彩色电视测试卡是一种以直观方式评价彩色电视接收机质量的测试信号.我们以Z80微处理机为核心,组成了彩色电视同步信号和彩色测试卡发生装置。将微机技术、数字技术和模拟技术结合在一起,并发挥微机软件的作用,使原先需要使用大量组合和时序逻辑电路才能产生的各种信号(如复合同步、复合消隐等同步信号和圆、彩条、灰条、时钟等测试卡信号)尽可能地用软件直接产生或用软件简化控制电路,通过“以软代硬”来实现整个系统的小型化、高可靠、低成本。所有软件均固化于EPROM中,通过改变软件即可方便地改变测试卡图形的排列和图案的内容而不必大量地改变硬件结构。同样,只需修改软件中同步信号形成程序,便可按需要产生各种非广播电视标准的同步信号和测试卡。
Color TV test card is an intuitive way to evaluate the quality of color television receiver test signal.We Z80 microprocessor as the core, composed of color TV synchronization signal and color test card generator. The computer technology, digital technology and analog technology together, and play the role of computer software, the original need to use a large number of combinations and timing logic circuit can generate a variety of signals (such as composite synchronization, composite blanking and other synchronization signals and circles, Color bars, gray bars, clocks and other test card signals) as much as possible with the software directly generated or software to simplify the control circuit, through the “soft generation hard” to achieve the entire system of small, high reliability and low cost. All software is solidified in the EPROM, by changing the software can easily change the test card graphics arrangement and pattern content without having to change the hardware structure. Similarly, simply modify the synchronization signal in the software to form a program, you can generate a variety of non-broadcast television standard synchronization signals and test cards as needed.