3T77: Difference between revisions

393 bytes added ,  24 December 2023
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|type=3T77  
|type=3T77  
|summary=Sampling sweep plug-in  
|summary=Sampling sweep plug-in  
|image=Tek 3t77 front.JPG
|image=Tek 3t77 front.jpeg
|caption=Tektronix 3T77 front
|caption=Tektronix 3T77 Front
|designers=Bob Webb; Jim Geddes; Cliff Moulton  
|designers=Bob Webb; Jim Geddes; Cliff Moulton  
|introduced=1962  
|introduced=1962  
|discontinued=1973  
|discontinued=1973  
|manuals=
|manuals=
* [http://w140.com/tek_3t77_sn2642.pdf Tektronix 3T77 Manual (sn#2642, PDF)]
* [[Media:070-333.pdf | Tektronix 3T77 Manual with 3T77A-related Appendix]]
* [http://bama.edebris.com/download/tek/3t77/3t77.djvu  Tektronix 3T77 Manual (sn#4256, DjVu)]
* 3T77A manual 070-0546-00 needed
* [[Media:050-0419-00.pdf|Modification Note Documenting Replacement of 152-0074-00 Tunnel Diode with 152-0381-00 (PDF)]]
<small>
* [[Media:Tek 3t77 cal outline.pdf|Tektronix 3T77 Calibration Outline (PDF, OCR)]]
'''Modifications'''
* [[Media:050-0419-00.pdf|Replacement of 152-0074-00 Tunnel Diode with 152-0381-00]]
'''Calibration'''
* [[Media:Tek 3t77 cal outline.pdf | Tektronix 3T77 Calibration Outline]] (OCR)
}}
}}
The '''Tektronix 3T77''' is a [[sampling_oscilloscope|sampling]] sweep plug-in for [[560-series scopes]].
The '''Tektronix 3T77''' is a [[sampling_oscilloscope | sampling]] sweep plug-in for [[560-series scopes]].
It was [[introduced in 1962]], along with the [[567]] and [[3S76]].
It was [[introduced in 1962]], along with the [[567]] and [[3S76]].


[[Bob Webb]] and maybe [[Jim Geddes]] and possibly [[Cliff Moulton]] designed the Type 77, later named the 3T77.
[[Bob Webb]] and maybe [[Jim Geddes]] and possibly [[Cliff Moulton]] designed the a plug-in called "Type 77" (not to be confused with the identically named but totally different non-sampling sweep plug-in also called [[77|Type 77]]). The "Type 77" sampling sweep evolved into the 3T77.


It triggers on either the internal trigger pick-off from the vertical plug-in or from an external trigger signal input.   
The '''Tektronix 3T77A''' made its first appearance in the 1966 catalog.
 
Both versions trigger on either the internal trigger pick-off from the vertical plug-in or from an external trigger signal input.   
Triggering is faster and more sensitive with an external input.   
Triggering is faster and more sensitive with an external input.   


The 3T77 can operate in any of four modes: external sweep, manual sweep, normal, or single sweep.   
The 3T77/3T77A can operate in any of four modes: external sweep, manual sweep, normal, or single sweep.   
In external sweep mode, an external control voltage is applied to a BNC connector on the front panel of the 3T77.   
In external sweep mode, an external control voltage is applied to a BNC connector on the front panel of the 3T77.   
This voltage determines the X-position of the spot on the CRT and, correspondingly, the delay from the trigger event to the sampling point.   
This voltage determines the X-position of the spot on the CRT and, correspondingly, the delay from the trigger event to the sampling point.   
Manual mode is the same as external sweep mode, but the control voltage is generated internally based on the position of a potentiometer on the front panel of the 3T77.   
Manual mode is the same as external sweep mode, but the control voltage is generated internally based on the position of a potentiometer on the front panel of the 3T77.   
In normal mode, an internal ramp generator produces the control voltage, repeatedly redrawing the trace on the CRT.   
In normal mode, an internal ramp generator produces the control voltage, repeatedly redrawing the trace on the CRT.   
In single sweep mode, the internal ramp generator is started by a button on the front panel, makes on horizontal trace, and then waits for the  
In single sweep mode, the internal ramp generator is started by a button on the front panel, makes one horizontal trace, and then waits for the button to be pressed again.
button to be pressed again.
 
{{MissingSpecs}}


==Internals==
==Internals==
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===Difference of 3T77 and 3T77A===
===Difference of 3T77 and 3T77A===
Time-Postiton instead Delay-Knob, with more range of delaying by slow sweep rate.
TIME POSITION knob instead of a DELAY knob, with more range of delay by slow sweep rate.
Recovery-Time-Knob can be pulling for HF-sync.  


==Specifications==
The RECOVERY TIME knob can be pulled for HF-sync.
[[Category:Specifications needed]]''please add''


==Pictures==
==Pictures==
====3T77 Photos====
<gallery>
<gallery>
Tek 3t77 front.JPG|3T77 front
Tek 3t77 front.JPG|3T77 Front
3t77 1.jpg|3T77
3t77 1.jpg|3T77
3t77 2.jpg|3T77
3t77 2.jpg|3T77
Line 56: Line 62:
3t77 8.jpg|3T77
3t77 8.jpg|3T77
3t77 9.jpg|3T77
3t77 9.jpg|3T77
3t77a trig.jpg|3T77A Trigger Board
3t77 trigger schem.png|Trigger schematic
3t77 block diagram.png|Block Diagram
3t77 connector and ps schem.png|Connector and Power Supply
3t77 horizontal amp schem.png|Horizontal Amp Schematic
3t77 staircase schem.png|Staircase Schematic
3t77 fast ramp schem.png|Fast Ramp Schematic
Tek 3t77a front.jpg|3T77A
Tek 3t77a left.jpg|3T77A
Tek 3t77a right.jpg|3T77A
Tek 3t77a triggerboard.jpg|3T77A
Tek 3t77a top.jpg|3T77A
Tek 3t77a rear.jpg|3T77A
</gallery>
</gallery>


====3T77 Schematics====
<gallery>
3t77 trigger schem.png | Trigger Schematic
3t77 block diagram.png | Block Diagram
3t77 connector and ps schem.png | Connector and Power Supply
3t77 horizontal amp schem.png | Horizontal Amp Schematic
3t77 staircase schem.png | Staircase Schematic
3t77 fast ramp schem.png | Fast Ramp Schematic
</gallery>
====3T77A Photos====
<gallery>
Tek 3t77a front.jpeg | 3T77A Front
Tek 3t77a left.jpg | 3T77A Left
Tek 3t77a right.jpg | 3T77A Right
3t77a trig.jpg | 3T77A Trigger Board
Tek 3t77a triggerboard.jpg | 3T77A Trigger Board
Tek 3t77a top.jpg | 3T77A Top
Tek 3t77a rear.jpg | 3T77A Rear
</gallery>
==Components==
{{Parts|3T77}}
{{Parts|3T77A}}


[[Category:Sampling plugins]]
[[Category:Sampling plugins]]
[[Category:560 series plugins]]
[[Category:560 series plugins]]