The main purpose of this Recommendation is to define means by which interface impedance may be measured@ rather than to describe precise procedures for pre-processing@ stabilizing and operating the tubes or valves to be measured@ although the tube or valve operating conditions@ under which the measurement of interface impedance may be made@ are known to have a substantial effect on the results obtained. It is also an objective of this Recommendation to describe means for evaluating the performance of interface impedance measuring equipment with respect to : Accuracy as a function of the transconductance of the tube or valve being measured. Accuracy as a function of the resistance of the interface. Accuracy as a function of the time constant of the equivalent interface network. The measuring methods and procedures described in this Recommendation are designed to provide information on the following cathode-interface impedance characteristics of tubes or valves : The presence of cathode-interface impedance. The equivalent resistance of cathode-interface impedance. The equivalent capacitance of cathode-interface impedance. Clause 7 outlines precautions to be taken and results to be expected under certain conditions of operation of the tubes or valves being measured for interface impedance characteristics.
60151-9-1966由IEC - International Electrotechnical Commission 发布于 1966-01-01,并于 1969-12-31 实施。
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