Tektronix S-4 Sampling Head for 7000 Series Oscilloscopes

<p>The S4 Sampling Head has a 25 ps risetime, DC to 14GHz, 50 ohm input impedance
Variable DC Offset allows signals between +1 V and -1 V limits to be displayed at 2 mV/div
Displayed noise is &gt;/= 5 mV unsmoothed, 2.5 mV smoothed (includes 90% dots)</p>