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{{Oscilloscope Sidebar |
{{Oscilloscope Sidebar
title=Tektronix 565 |
|manufacturer=Tektronix
image=Rm 565 cal signal.jpg |
|series=560-series scopes
caption=Tektronix RM 565 |
|model=565
introduced=1962 |
|summary=10 MHz dual-beam scope
discontinued=1974 |
|image=Rm 565 cal signal.jpg
summary=10 MHz dual-beam scope |
|caption=Tektronix RM 565
manuals=
|introduced=1962
* [http://bama.edebris.com/download/tek/565/565.djvu Tektronix 565 Manual (DjVu)]
|discontinued=1974
* [http://w140.com/tek_565.pdf Tektronix 565 Manual (PDF)]
|manuals=
* [[Media:070-269.pdf|Tektronix 565 Manual]]
* [[Media:Tek 565 preliminary 070-269.pdf|Tektronix 565 Preliminary Manual]]
* [[Media:Tek 565 irb.pdf|Tektronix 565 Instrument Reference Book]] (OCR)
* [[Media:Tek 565 fcp.pdf|Tektronix 564 Factory Calibration Procedure]]
}}
}}
The '''Tektronix Type 565''' is a [[dual-beam scopes|dual-beam scope]] that takes two [[560-series plug-ins|560-series vertical plug-ins]].
The '''Tektronix Type 565''' is a [[dual-beam scopes|dual-beam scope]] that takes two [[560-series plug-ins|560-series vertical plug-ins]].
It was [[introduced in 1963]].
It was [[introduced in 1962]].
The 1974 catalog was the last one that included the 565.
The 1974 catalog was the last one that included the 565.


A rackmount version, the RM565, was also produced. Aside from being dual-beam, the 565 is unusual among the  
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.
other [[560-series scopes]] in the fact that it (the mainframe) has built-in trigger, sweep, and horizontal amplifier circuits.


==Specifications==
{{BeginSpecs}}
The vertical characteristics are mostly determined by the vertical plug-ins
{{Spec|Bandwidth|up to 10 MHz  determined by vertical plug-ins}}
 
{{Spec|Sweep|1 μs/div to 5 s/Div, 1−2−5, ×10 magnifier, and variable }}
The fastest sweep is 1 μs/div (100 ns/div with 10x horizontal magnification enabled).  The sweep delay can be adjusted over a range from 10 μs to 50 seconds.
{{Spec|Sweep delay| 10 μs to 50 seconds}}
 
{{Spec|Power|600 W max. including plug-ins}}
Power consumption, including plug-ins, is about 600 watts, maximum.
{{Spec|Calibrator|1 kHz square wave, 1 mV to 100 V in decade steps}}
 
{{Spec|CRT| [[T5650]], cathode at −3.9 kV, no post-deflection acceleration}}
The internal calibrator produces a 1 kHz square wave with amplitude selectable in decade steps from 1 mV to 100 V.
{{EndSpecs}}


==Circuits==
==Circuits==
The 565 uses the [[T5650]] CRT.
CRT acceleration voltage is produced by a transformer driving a single [[1X2]] rectifier tube.


===Vertical Signal Path===
===Vertical Signal Path===
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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 0.7—3 pF trimmer capacitor is connected immediately behind each of the plug-in connectors, and allows
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.
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In all other [[560-series scopes]], those functions are performed by the horizontal plug-in.
In all other [[560-series scopes]], those functions are performed by the horizontal plug-in.


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 then is discriminated by a [[6DJ8]]-based Schmitt trigger.
and sent to "TRIGGER" switches.  From there, the trigger signal is sent through a [[6DJ8]]-based differential amplifier  
and then is discriminated by a [[6DJ8]]-based Schmitt trigger.
    
    
The 565 is also unusual in that it employs a [[tunnel diodes|tunnel diode]] (D845, a [[TD4]], which is equivalent to the [[1N3718]]) in the trace intensification circuit.   
The 565 is also unusual in that it employs a [[tunnel diodes|tunnel diode]]
(D845, a [[TD4]], which is equivalent to the [[1N3718]]) in the trace intensification circuit.   
The tunnel diode forms a bistable multivibrator: kick it one way and it turns on and stays on,  
The tunnel diode forms 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. The tunnel diode is DC-coupled to the base-emitter junction of Q843,  
kick it the other way and it turns off and stays off.
which is a 2N404 germanium PNP transistor. Because the tunnel diode and transistor are DC-coupled, the transistor needs
The tunnel diode is DC-coupled to the base-emitter junction of Q843,  
to be germanium. This is one of the rare cases when a failed germanium transistor cannot be replaced with a silicon part.
which is a 2N404 germanium PNP transistor.
Contrast this with the timebase A trigger of the [[585|585A]], which uses a tunnel diode AC-coupled to a transistor, which
Because the tunnel diode and transistor are DC-coupled, the transistor needs to be germanium.
makes the forward voltage of the transistor's base-emitter junction irrelevant.
This is one of the rare cases when a failed germanium transistor cannot be replaced with a silicon part.
Contrast this with the timebase A trigger of the [[585|585A]], which uses a tunnel diode AC-coupled to a transistor,
which makes the forward voltage of the transistor's base-emitter junction irrelevant.


=== Calibrator ===
=== Calibrator ===
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=== Auxiliary Power Jack ===
=== Auxiliary Power Jack ===
The 565 has a connector on the rear panel, J780, which allows to 565 to provide power to external devices.
The 565 has an [[Amphenol 165 series connectors|Amphenol 165 series connector]] (J780) on the rear panel, which allows the 565 to provide power to external devices.
The pinout and specs are shown below.
The pinout and specs are shown below.


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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.
The 556 uses [[letter-series and 1-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.
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.
Subjectively, the trace of the 565 is very sharp, sharper than the trace of the 556.


== Mechanical ==
== Mechanical ==
Benchtop (565) and rackmount versions (RM565) were made. The benchtop version has the following dimensions:
Benchtop (565) and rackmount versions (RM565) were made.
The benchtop version has the following dimensions:
* Width: 17 inches
* Width: 17 inches
* Height: 13.5 inches
* Height: 13.5 inches
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Tek rm565 gray8.jpg|Gray RM565
Tek rm565 gray8.jpg|Gray RM565
Tek rm565 gray9.jpg|Gray RM565
Tek rm565 gray9.jpg|Gray RM565
Tek 565 j780.jpg|J780 on rear panel
Tek 565 j780 specs.png|J780 Specs
Tek 565 j780 specs.png|J780 Specs
Tek 565 j780 pinout.png|J780 Pinout
Tek 565 j780 pinout.png|J780 Pinout
Tek rm565 top inside.jpg
Tek rm565 hvps.jpg
Tek rm565 hv rectifier.jpg
Tek rm565 intensifier circuit.jpg
Rm565 two trace2.jpg
Tek rm565 top internal.jpg|top internal
Tek rm565 right cover off.jpg|LV power supply tubes on the bottom, HV on the top, fan in the rear
Tek rm565 bottom internal.jpg|bottom internal
Tek rm565 rear.jpg|rear
</gallery>
</gallery>
==Components==
{{Parts|565}}


[[Category:560 series scopes]]
[[Category:560 series scopes]]
[[Category:Dual beam scopes]]
[[Category:Dual beam scopes]]


[[Category:Introduced in 1963]]
[[Category:Introduced in 1962]]