565: Difference between revisions
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Two trigger and sweep modules are contained in the mainframe. The 565 is similar to the [[556]], but with much | Two trigger and sweep modules are contained in the mainframe. The 565 is similar to the [[556]], but with much | ||
less bandwidth and without tunnel diode triggering. A rackmount version, the RM565, was also produced. | less bandwidth and without tunnel diode triggering. A rackmount version, the RM565, was also produced. | ||
The triggering signal passes through a 6DJ8-based differential amplifier and then is discriminated by a | The triggering signal passes through a [[6DJ8]]-based differential amplifier and then is discriminated by a | ||
[[6DJ8]]-based Schmitt trigger. As is usual for 560-series scopes, the vertical deflection plates of the CRT | [[6DJ8]]-based Schmitt trigger. As is usual for 560-series scopes, the vertical deflection plates of the CRT | ||
are driven directly by the vertical plug-in. Aside from being dual-beam, the 565 is unusual among the | are driven directly by the vertical plug-in. Aside from being dual-beam, the 565 is unusual among the | ||
Revision as of 13:40, 1 July 2010
The Tektronix Type 565 is a dual-beam scope that takes two 2-series or 3-series vertical plug-ins. Two trigger and sweep modules are contained in the mainframe. The 565 is similar to the 556, but with much less bandwidth and without tunnel diode triggering. A rackmount version, the RM565, was also produced. The triggering signal passes through a 6DJ8-based differential amplifier and then is discriminated by a 6DJ8-based Schmitt trigger. As is usual for 560-series scopes, the vertical deflection plates of the CRT are driven directly by the vertical plug-in. Aside from being dual-beam, the 565 is unusual among the other 560-series models in the fact that it has built-in trigger, sweep and horizontal amplifier circuits. It is also unusual in that it employs a tunnel diode in the trace intensification circuit. The tunnel diode forms as a bistable multivibrator: kick it one way and it turns on and stays on, kick it the other way and it turns off and stays off.