SELECTION LEVEL MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a selection level measuring apparatus capable of widening a dynamic range of effective value detection compared with conventional ones. SOLUTION: A gain control means 2 with varying gain by a control voltage 11 is provided in the front step of an effective value detection part 3. The gain control means 2 controls a signal level inputted to the effective value detection part 3 to be constant, and signal level of a measured signal is measured and displayed from the control voltage 11. Thus, this selection level measuring apparatus performing effective value detection can secure a dynamic range for a variable capacity of the gain control means 2. Therefore, the dynamic range of the effective value detection can be widened compared to the conventional ones.