Radio-Relay System Design Objectives for Noise at the Far End of a Hypothetical Reference Circuit with Reference to Telegraphy Transmission - International Analogue Carrier Systems (Study Group XV) 1 pp
Use of a measuring instrument having a 5-ms time constant (integrating time) is recommended
so as to detect, in particular, the presence of short high-level noise bursts, such as those caused by power supplies and by the equipment. Administrations should