Not all signal paths were created equal. With complex location linkups, spanning thousands of kilometers, audio and video signals don't always follow the same route. Internet, microwave, broadband, telephone, satellite or undersea cable may be a factor. Typically, quality is not a problem, but synchronisation often is. The Kamesan Lip Checker has been developed to measure and quantify these delays, providing the engineer with precisely calculated offsets to calibrate signal delay equipment.

No special signal is required. For example, the system can typically extract information from any naturally occuring audio and video event such as a closeup of a presenter speaking (point probe at mouth) or someone clapping their hands on camera. However, for increased accuracy and ease of use the Video Kachinko unit is available. This utilises a high output LEDs for light pulsing timing while at the same time emitting a tone for audio signal timing. The camera is pointed at the reflector and the audio connected via na XLR. With such a distinct, controlled source, the various feeds from the location link can be synchronised within seconds.