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DB51/T 2322-2017 安防视频监控系统 视频指标通用检测方法

本标准规定了安防视频监控系统视频指标的术语和定义、测试设备、测试条件、检测方法。 本标准适用于各类安防视频监控系统的视频性能指标的检测。

General detection method for video index of security video surveillance system

ITU-R SM.1269-1997 方向定位轴承的分类

that direction finding measurements have great significance in the investigation of harmful interference and efficient use of the radio spectrum

Classification of Direction Finding Bearings

ITU-T Q.138-1989 勘测设备和测量信号的工具

For local checks of correct equipment and for readjusting the equipment, international exchanges should

Instruments for Checking Equipment and Measuring Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 1 pp

ITU-T Q.164-1989 勘测设备和信号的测试设备

Note on items a) to m) - As part of the comprehensive tests it may, in certain circumstances such as fault localization, be desirable to test the frequency, level, and duration of received signals. Normally, however, it may be assumed that each Administra

Test Equipment for Checking Equipment and Signals - Specifications of Signalling Systems Nos. 4 and 5 (Study Group XI) 2 pp

ITU-T Q.331-1989 勘测设备和信号的测试设备

In regard to measuring time intervals a recorder having a minimum of two input channels may be useful. The recorder characteristic should conform with the accuracy requirements quoted in 1) and 2) above and be easily connected to the circuit under test. T

Test Equipment for Checking Equipment and Signals - Specifications of Signalling Systems R1 and R2 (Study Group XI) 3 pp