IPC - Association Connecting Electronics Industries
Scope
This test method describes the test procedures required to measure propagation delay in flat cables. This test method is an alternative to IPC-TM-650@ Method 2.5.19. Propagation delay is defined as the time required for a pulse to traverse a unit length of cable. Excessive propagation delay will result in the malfunction of critical circuits due to the late arrival of pulses. Propagation delay is directly proportional to the effective dielectric constant of the insulation.