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{{Oscilloscope Sidebar |manufacturer=Tektronix |designers= |series=560-series scopes|
{{Oscilloscope Sidebar
model= 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
* [[Media:070-269.pdf|Tektronix 565 Manual (PDF)]]
|discontinued=1974
|manuals=
* [[Media:070-269.pdf|Tektronix 565 Manual]]
* [[Media:Tek 565 preliminary 070-269.pdf|Tektronix 565 Preliminary Manual]]
* [[Media:Tek 565 preliminary 070-269.pdf|Tektronix 565 Preliminary Manual]]
* [[Media:Tek 565 irb.pdf|Tektronix 565 Instrument Reference Book (PDF, OCR)]]
* [[Media:Tek 565 irb.pdf|Tektronix 565 Instrument Reference Book]] (OCR)
* [[Media:Tek 565 fcp no ocr.pdf|Tektronix 564 Factory Calibration Procedure (PDF, needs OCR)]]
* [[Media:Tek 565 fcp no ocr.pdf|Tektronix 564 Factory Calibration Procedure]] (needs OCR)
}}
}}
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]].
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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).
{{Spec|Sweep delay| 10 μs to 50 seconds}}
The sweep delay can be adjusted over a range from 10 μs to 50 seconds.
{{Spec|Power|600 W max. including plug-ins}}
 
{{Spec|Calibrator|1 kHz square wave, 1 mV to 100 V in decade steps}}
Power consumption, including plug-ins, is about 600 watts, maximum.
{{Spec|CRT| [[T5650]], cathode at −3.9 kV, no post-deflection acceleration}}
 
{{EndSpecs}}
The internal calibrator produces a 1 kHz square wave with amplitude selectable in decade steps from 1 mV to 100 V.


==Circuits==
==Circuits==
The 565 uses the [[T5650]] CRT.
CRT acceleration voltage is produced by a transformer driving a single [[1X2]] rectifier tube.
There is no post-deflection acceleration.
The CRT cathode is at −3.9 kV, which is produced by a transformer driving a single [[1X2]] rectifier tube.


===Vertical Signal Path===
===Vertical Signal Path===
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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]]
The 565 is also unusual in that it employs a [[tunnel diodes|tunnel diode]]
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=== Auxiliary Power Jack ===
=== Auxiliary Power Jack ===
The 565 has an [[Amphenol 165 series connectors|Amphenol 165 series connector]] (J780) on the rear panel,
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.
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.
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