【名词&注释】
成本低(low cost)、效率高(high efficiency)、水平分解力(horizontalcutter forage harvester defin ...)、串联型稳压电源(stabilized power supply in series)、稳定性和可靠性(stability and reliability)、垂直分解力(vertical resolution)、开关式稳压电源、PAL解码器(pal decoder)
[单选题]PAL解码器(pal decoder)中PAL开关信号的频率为()。
A. A.4.43MHz
B. B.358MHz
C. C.15.625kHz
D. D.约7.8kHz