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The Tektronix Type 81 is a plug-in adapter so that letter-series and 1-series plug-ins can | The Tektronix Type 81 is a plug-in adapter so that letter-series and 1-series plug-ins can | ||
be used in 580-series scopes. | be used in 580-series scopes. The Type 81 contains a two-stage amplifier. The letter-series | ||
plug-in drives the input stage of the Type 81 which is a high impedance, similar to the input | |||
of a 530-, 540-, or 550-series scope. The second stage of the Type 81 is a cathode-follower, | |||
which drives the 580-series scope using a low impedance, as is required by 580-series scopes. | |||
<gallery> | <gallery> | ||
Image:Type-81-schem.png | Image:Type-81-schem.png | ||
</gallery> | </gallery> | ||