The Tektronix S1 is a low-noise, 350 ps risetime unit with 50 ohms input impedance.
? Bandwidth is equivalent to DC to 1GHz and displayed noise is <2 mV unsmoothed and 1 mV smoothed

Designed for use with the type 3S2, 3S5, and 3S6 Dual Trace Sampling Units, 7S11 Sampling Unit, and the 7S12 TDR Unit.