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7J20: Difference between revisions
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To provide a linear nm/div horizontal display on the 7000-series mainframe, | To provide a linear nm/div horizontal display on the 7000-series mainframe, | ||
the vidicon horizontal scan signal is passed through a function generator IC, | the vidicon horizontal scan signal is passed through a function generator IC, | ||
the [[155-0106-00]], | the [[155-0106-00]] (U1550 and U1590), | ||
which implements an interpolated lookup table. | which implements an interpolated lookup table. | ||
Inside the 7J20, there are 40 trimmer potentiometers that allow the lookup function to be tweaked | Inside the 7J20, there are 40 trimmer potentiometers that allow the lookup function to be tweaked | ||