Tektronix SD22

The Tektronix SD22 is a Low-noise Sampling Head.
It is a dual-channel, 12.5 GHz sampling head designed for low-noise measurement in digital communications and device characterization applications. It provides an acquisition rise time of 28 ps, and typically 450 µVRMS of displayed noise. And with smoothing, noise levels are 180 µVRMS.

To capture and display the switching characteristics of the high-speed communications circuits, to make accurate statistical measurements of signal noise and of signal timing jitter, or to get stable timing measurements of fast digital ICs, the noise floor of the test equipment has to be kept to a minimum. The SD22 is the instrument for these low-noise applications.