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{{Plugin Sidebar | designers=|
{{Plugin Sidebar
manufacturer=Tektronix | type=Type M|
|manufacturer=Tektronix
summary=20 MHz quad channel amplifier|
|series=500-series scopes
image=Type m front.jpg |  
|type=Type M
caption=Type M front view|
|summary=20 MHz quad-channel amplifier
introduced=1962 |
|image=Type m front.jpg
discontinued=1973 |
|caption=Type M front view
series=500-series scopes|
|introduced=1962
manuals=
|discontinued=1973
* [http://w140.com/mmm/tek-m.pdf Tektronix Type M Manual (PDF)]
|designers=Oz Svehaug;Glenn Parks
* [http://bama.edebris.com/manuals/tek/m/ Tektronix Type M Manual (BAMA)]
|manuals=
<!-- * [http://w140.com/tek_fcp/tek_type_m_factory_cal_proc.pdf Tektronix Type M Factory Calibration Procedure (PDF)] -->
* [[Media:070-295.pdf|Tektronix Type M Manual]] (OCR)
 
* [[Media:tek_type_m_fcp.pdf|Tektronix Type M Factory Calibration Procedure]] (OCR)
* [[Media:070-295.pdf|Tektronix Type M Manual (PDF, OCR, bad-OCR)]]
* [[Media:Tek type m cal outline.pdf|Tektronix Type M Calibration Outline]] (OCR)
* [[Media:tek_type_m_fcp.pdf|Tektronix Type M Factory Calibration Procedure (PDF, OCR)]]
<small>
* [[Media:Tek type m cal outline.pdf|Tektronix Type M Calibration Outline (PDF, OCR)]]
'''Alternate copies'''
* [https://bama.edebris.com/manuals/tek/m/ Tektronix Type M Manual]] (DjVu @ BAMA)
</small>
}}
}}
The '''Tektronix Type M''' is a four-channel plug-in for [[500-series scopes]].
The '''Tektronix Type M''' is a four-channel plug-in for [[500-series scopes]] that was [[introduced in 1962]], along with the [[O|Type O]], and dropped after 1972.
It was designed by [[Oz Svehaug]] and [[Glenn Parks]].
It was designed by [[Oz Svehaug]] and [[Glenn Parks]].
Early versions had [[UHF connector]]s for the inputs. 
Later versions have [[BNC connector]]s for the inputs.


Type M was [[introduced in 1962]], along with the [[O|Type O]], and dropped after 1972.
Early versions had [[UHF connector]]s, later versions have [[BNC connector]]s for the inputs.


{{MissingSpecs}}
{{BeginSpecs}}
 
{{Spec | Bandwidth | DC to 20 MHz }}
The risetime is 17 nanoseconds, bandwidth is DC to 20 MHz.
{{Spec | Rise time | 17 ns }}
Maximum sensitivity is 20 mV/div.
{{Spec | Deflection | 20 mV/div to 10 V/div, 1–2–5 }}
Each channel can be AC or DC coupled, inverted or straight, or disabled entirely.
{{Spec | Modes | Each channel can be AC or DC coupled, inverted or straight, or disabled entirely. The enabled channels can operate in CHOP or ALT mode. }}
The enabled channels can operate in CHOP or ALT mode.
{{EndSpecs}}


==Internals==
==Internals==
Each input goes through a step attenuator,  
Each input goes through a step attenuator, is clamped by a neon bulb, and then is fed to the grid of a cathode follower made with a [[7586]] Nuvistor tube.   
is clamped by a neon bulb,  
and then is fed to the grid of a cathode follower  
made with a [[7586]] Nuvistor tube.   
Next, the signal goes to a PNP differential amplifier.   
Next, the signal goes to a PNP differential amplifier.   
Diodes in series with the collector signal  
Diodes in series with the collector signal of this differential amplifier are used for input channel switching.
of this differential amplifier are used for input channel switching.
An internal differential signal bus connects the switched outputs of each of the input channels and feeds the signal to the output amplifier,  
An internal differential signal bus connects  
the switched outputs of each of the input channels  
and feeds the signal to the output amplifier,  
which drives pins 1 and 3 of the [[500-series plug-in connector]].   
which drives pins 1 and 3 of the [[500-series plug-in connector]].   
The output amplifier is two [[12AU6]] pentodes  
The output amplifier is two [[12AU6]] pentodes connected as a differential amplifier,  
connected as a differential amplifier,  
followed by a [[12AT7]] dual triode acting as a cathode follower to drive the output with a relatively low impedance.
followed by a [[12AT7]] dual triode acting  
as a cathode follower to drive the output  
with a relatively low impedance.


==Pictures ==
==Pictures ==
<gallery>
<gallery>
Type_m_front.jpg|Late Type M Front view.
Type_m_front.jpg|Late Type M Front view
Type_m_left.jpg|Late Type M Left view.
Type_m_left.jpg|Late Type M Left view
Type_m_right.jpg|Late Type M Right view
Type_m_right.jpg|Late Type M Right view
Tek_early_m_front.jpg|Early Type M Front
Tek_early_m_front.jpg|Early Type M Front
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Tek m 501 6.jpg
Tek m 501 6.jpg
Tek m mod210d.jpg|Type M Mod 210D
Tek m mod210d.jpg|Type M Mod 210D
Type m chan switching low sn.png|Channel Switching Schematic, sn 824 and below
Type m chan switching low sn.png|Channel Switching Schematic, SN 824 and below
Type m chan switching sn 825-up.png|Channel Switching Schematic, sn 825 and above
Type m chan switching sn 825-up.png|Channel Switching Schematic, SN 825 and above
Type m 4 chan switched amp low sn.png|Four Channel Switched Amplifier Schematic, sn 2759 and below
Type m 4 chan switched amp low sn.png|Four Channel Switched Amplifier Schematic, SN 2759 and below
Type m 4 chan switched amp sn 2760-up.png|Four Channel Switched Amplifier Schematic, sn 2760 and above
Type m 4 chan switched amp sn 2760-up.png|Four Channel Switched Amplifier Schematic, SN 2760 and above
tek_type_m_in_556.jpg|Type M in [[556]]
tek_type_m_in_556.jpg|Type M in [[556]]
</gallery>
</gallery>
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/72958"

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