Communication cables. Specifications for test methods - Electrical test methods. Characteristic impedance, input impedance, return loss1 Scope This part of EN 50289 details the test methods to determine characteristic impedance, input impedance and return loss of cables used in analogue and digital communication systems. It is to be read in conjunction with EN 5028911, which contains essential provisions for its application.

2 Polymerized material

Particular requirements for basic safety and essential performance

Part removal direction

and for service users with both short- and long-term needs

If no ambiguity is likely to occur

• Inner surfaces of metallic container structures

This International Standard specifies the characteristics of hexagon socket button head screws with threads from M3 up to and including M16

BS EN 1504-10 gives requirements for:

air-break circuit-breakers for operation at 50 Hz

Guidelines present in BS EN 16230-1+A1 consist of safety test methods for karts

in order to improve the quality of the work and productivity

the loss of energy as the test foot passes over the test surface is measured by the reduction in length of the upswing using a calibrated scale