SD-22
The Tektronix SD-22 is a low-noise sampling head for 11800 series digital sampling scopes.
From the Tektronix site:
The SD22 is a dual-channel, 12.5 GHz sampling head specifically 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. With smoothing, noise levels are 180 µVRMS.
In order to precisely capture and display the switching characteristics of high-speed communications circuits, to make accurate statistical measurements of signal noise and signal timing jitter, or to obtain stable timing measurements of fast digital ICs, the noise floor of the test equipment must be kept to a minimum. The SD22 is the ideal instrument for these low-noise applications.
Key Specifications
| Rise time | 28 ps |
|---|---|
| Bandwidth | 12.5 GHz |
| Sampling repetition rate | 100 Hz to 200 kHz |
| Time coincidence | 10 ps between channels |
| Maximum input voltage | 1 Vp-p, 1.6 Vp-p operating, ±3 V non-destructive |
| Noise | 800 μVRMS max., 400 μVRMS typ. (400/180 μV with smoothing) |
| Time coincidence | 10 ps between channels |
| Input | 3.5 mm connector |
