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X381: Difference between revisions
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→Rotary Optical Encoder
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Tektronix X381 optical encoder values are an interleaving of three sequences, each in increments of approximately 1.5% per step. | Tektronix X381 optical encoder values are an interleaving of three sequences, each in increments of approximately 1.5% per step. | ||
(Colored lines added to emphasize the three-way interleaving.) | (Colored lines added to emphasize the three-way interleaving.) | ||
The bulb used for illuminating the encoder wheel is marked "6.3V" and has an integral lens. | |||
See photo below. | |||
Two of these bulb are used, side by side. | |||
It is possible that they are energized independently to select different tracks on the encoder disk, | |||
e.g., the "SEC"-mode numeric encodings versus the "Hz"-mode numeric encodings. | |||
==Motorized TIME/DIV== | ==Motorized TIME/DIV== | ||