A digital fi‘equeney meter designed with FPGA development software Q-~us 11 is introduced.The 1 Hz—l MHz input measured pulse signals of the digital ii‘equency meter can be used for measuring frequency,period,pulse width and duty ratio,etc.The test results stably display O71 3 seven—segment numeric tubes,and the measuring ranges may be switched over automatically.The measuring error is equal to or less than 0.1%.
QTP全名Quick Test Professional,是MI公司出品的一款測(cè)試工具.它的優(yōu)點(diǎn)是使用方便,功能強(qiáng)大并且可以通過與測(cè)試管理工具的互連達(dá)到自動(dòng)化功能測(cè)試的目的. QTP是專門針對(duì)B/S模式的測(cè)試工具.它具有:識(shí)別能力強(qiáng),回放精確等優(yōu)點(diǎn),是進(jìn)行B/S模式下功能測(cè)試的首選工具