In time domain measurements of repetitive pulses there are situations when a signal delay line cannot be tolerated and a signal pretrigger is not available. In such situations, a random sampling oscilloscope system must be used. In the course of recent research activities, the author encountered the need to employ a remote, 50 Ω feedthrough, 28 psec transition time, wide‐band sampling head with a random sampling oscilloscope system. Because the sampling head and the random sampling system were incompatible units from different manufacturers, an interfacing system was required to connect the two units. Presented here are a working design for the interface and operating results.