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The Tektronix Type 565 is a [[dual-beam scopes|dual-beam scope]] that takes two [[2-series or 3-series vertical plug-ins]]. | {{Oscilloscope Sidebar | | ||
title=Tektronix 565 | | |||
image=Wellenkino 565.jpg | | |||
caption=Tektronix 565 | | |||
years=1963 — ? | | |||
summary=Dual-beam scope | | |||
manuals= | |||
* [http://bama.edebris.com/download/tek/565/565.djvu Tektronix 565 Manual (DjVu)] | |||
* [http://w140.com/tek_565.pdf Tektronix 565 Manual (PDF)] | |||
}} | |||
The '''Tektronix Type 565''' is a [[dual-beam scopes|dual-beam scope]] that takes two [[2-series or 3-series vertical plug-ins]]. | |||
It was [[introduced in 1963]]. | It was [[introduced in 1963]]. | ||
A rackmount version, the RM565, was also produced. Aside from being dual-beam, the 565 is unusual among the | |||
other [[560-series scopes]] in the fact that it (the mainframe) has built-in trigger, sweep, and horizontal amplifier circuits. | |||
==Specifications== | |||
''please add'' | |||
==Circuits== | |||
The 565 uses the [[T5650]] CRT. | |||
== Vertical Signal Path == | ===Vertical Signal Path=== | ||
As is usual for [[560-series scopes]], the vertical deflection plates of the CRT | As is usual for [[560-series scopes]], the vertical deflection plates of the CRT | ||
are driven directly, differentially, by pins 17 and 21 of the vertical plug-in. | are driven directly, differentially, by pins 17 and 21 of the vertical plug-in. | ||
The left plug-in bay is for the lower beam and the right plug-in bay is for the upper beam. | The left plug-in bay is for the lower beam and the right plug-in bay is for the upper beam. | ||
A 0. | |||
A 0.7—3 pF trimmer capacitor is connected immediately behind each of the plug-in connectors, and allows | |||
for the mainframe to be calibrated so that plug-ins can be interchanged without requiring the | for the mainframe to be calibrated so that plug-ins can be interchanged without requiring the | ||
high-frequency compensation of the system to be readjusted. | high-frequency compensation of the system to be readjusted. | ||
The capacitance seen by the plug-in driving the scope should be 14. | The capacitance seen by the plug-in driving the scope should be 14.3 pF for either beam. | ||
There is no trigger pickoff in the vertical signal path of the 565. That function is performed by the plug-ins. | There is no trigger pickoff in the vertical signal path of the 565. That function is performed by the plug-ins. | ||
=== Trigger and Sweep === | |||
== Trigger and Sweep == | |||
The triggering signal comes from pin 11 on the plug-ins, is amplified by a [[12AT7]]-based cathode follower, | The triggering signal comes from pin 11 on the plug-ins, is amplified by a [[12AT7]]-based cathode follower, | ||
and sent to "TRIGGER" switches. From there, the trigger signal is sent through a [[6DJ8]]-based differential amplifier | and sent to "TRIGGER" switches. From there, the trigger signal is sent through a [[6DJ8]]-based differential amplifier | ||
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The sweep delay can be adjusted over a range from 10 microseconds to 50 seconds. | The sweep delay can be adjusted over a range from 10 microseconds to 50 seconds. | ||
The 565 is also unusual in that it employs a [[tunnel diodes|tunnel diode]] in the trace intensification circuit. The tunnel diode | The 565 is also unusual in that it employs a [[tunnel diodes|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 | ||
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. | it turns off and stays off. | ||
=== Calibrator === | |||
== Calibrator == | The internal calibrator produces a 1 kHz square wave with amplitude selectable in decade steps from 1 mV to 100 V. | ||
The internal calibrator produces | |||
in decade steps from | |||
It is an astable multivibrator formed by one half of a [[12AT7]] and a [[6AU6]]. | It is an astable multivibrator formed by one half of a [[12AT7]] and a [[6AU6]]. | ||
The other half of the 12AT7 serves as the output cathode follower for the calibrator. | The other half of the 12AT7 serves as the output cathode follower for the calibrator. | ||
== Comparison with the [[556]] == | == Comparison with the [[556]] == | ||
The 565 appears similar to the [[556]], but is different in many ways. | The 565 appears similar to the [[556]], but is different in many ways. | ||
The 556 uses tunnel diodes for triggering, while the 565 uses tubes. | The 556 uses tunnel diodes for triggering, while the 565 uses tubes. | ||
The 556 uses [[letter-series and 1-series plug-ins]] while the 565 uses 560-series plug-ins. | |||
while the 565 uses 560-series plug-ins. | Moreover, the bandwidth of the 556 is specified as 50 MHz, while the bandwidth of the 565 is specified as 10 MHz. | ||
Subjectively, the trace of the 565 is very sharp, sharper than the trace of the 556. | |||
while the bandwidth of the 565 is specified as | |||
Subjectively, the trace of the 565 is very sharp, | |||
sharper than the trace of the 556. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
File:Rm565_1.jpg|Front from RM565 | |||
File:Rm565_2.jpg | |||
File:IMG 1213.JPG| Open 565 | |||
File:Wellenkino 565.jpg | File:Wellenkino 565.jpg | ||
File:RM565_P7.jpg|RM565 with P7 CRT | |||
</gallery> | </gallery> | ||
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[[Category:Specifications needed]] | [[Category:Specifications needed]] | ||
[[Category:Introduced in 1963]] |