DB51/T 2322-2017 安防視頻監控系統 視頻指標通用檢測方法

本標準規定了安防視頻監控系統視頻指標的術語和定義、測試設備、測試條件、檢測方法。 本標準適用于各類安防視頻監控系統的視頻性能指標的檢測。

General detection method for video index of security video surveillance system

ITU-R SM.1269-1997 方向定位軸承的分類

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 勘測設備和測量信號的工具

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 勘測設備和信號的測試設備

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 勘測設備和信號的測試設備

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