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File:Tek7104-superluminal-beam.jpg | [https://web.archive.org/web/20110926020847/http://www.oregonlive.com/silicon-forest/index.ssf/2011/09/a_tektronix_oscilloscope_that.html Faster-than-light] beam on 7104? Using a [[067-0587-02]] calibration fixture at maximum amplitude produces this trace spanning 1.2 Div horizontally at 200 ps/Div and 8 Div vertically. Trace length is (1.2² + 8²)<sup>½</sup> × 8.5 mm = 68.8 mm, travelled in 1.2 × 200 ps = 240 ps. Apparent speed is therefore 68.8×10<sup>-3</sup> / 240×10<sup>-12</sup> m/s or 2.86×10<sup>8</sup> m/s. '''Very''' near miss ... | |||
File:Tek7104-ristetime-100hz.jpg | Rise time measurement. 150 ps risetime pulse from [[067-0587-02]] at 100 Hz repetition rate. Measured 240 ps (corrected for 150 ps fixture rise time: 190 ns = 1.8 GHz) | File:Tek7104-ristetime-100hz.jpg | Rise time measurement. 150 ps risetime pulse from [[067-0587-02]] at 100 Hz repetition rate. Measured 240 ps (corrected for 150 ps fixture rise time: 190 ns = 1.8 GHz) | ||
File:Tek7104-ristetime-1000hz.jpg | Rise time measurement as before, 1000 Hz repetition rate at same brightness settings. | File:Tek7104-ristetime-1000hz.jpg | Rise time measurement as before, 1000 Hz repetition rate at same brightness settings. |