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公司出品的一款測試工具.它的優(yōu)點是使用方便,功能強大并且可以通過與測試管理工具的互連達到自動化功能測試的目的. QTP是專門針對B/S模式的測試工具.它具有:識別能力強,回放精確等優(yōu)點,是進行B/S模式下功能測試的首選工具
