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The Type M is a four-channel plug-in for [[500-series scopes]]. | {{Plugin Sidebar 2 | | ||
Early versions had UHF | title=Tektronix Type M| | ||
Later versions have BNC | summary=20 MHz quad channel amplifier| | ||
The risetime is 17 nanoseconds, bandwidth is DC to | image=Type m front.jpg | | ||
Each input goes through a step attenuator, is clamped by a neon bulb, | caption=Type M front view| | ||
and then is fed to the grid of a cathode follower made with a [[7586]] Nuvistor tube. | introduced=1962 | | ||
discontinued=1973 | | |||
series=[[500-series scopes]]| | |||
manuals= | |||
* [http://w140.com/mmm/tek-m.pdf Tektronix Type M Manual (PDF)] | |||
* [http://bama.edebris.com/manuals/tek/m/ Tektronix Type M Manual (BAMA)] | |||
<!-- * [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 (PDF, OCR, bad-OCR)]] | |||
* [[Media:tek_type_m_fcp.pdf|Tektronix Type M Factory Calibration Procedure (PDF, OCR)]] | |||
* [[Media:Tek type m cal outline.pdf|Tektronix Type M Calibration Outline (PDF, OCR)]] | |||
}} | |||
The '''Tektronix Type M''' is a four-channel plug-in for [[500-series scopes]]. | |||
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. | |||
{{MissingSpecs}} | |||
The risetime is 17 nanoseconds, bandwidth is DC to 20 MHz. | |||
Maximum sensitivity is 20 mV/div. | |||
Each channel can be AC or DC coupled, inverted or straight, or disabled entirely. | |||
The enabled channels can operate in CHOP or ALT mode. | |||
==Internals== | |||
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. | |||
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 of this differential amplifier are used for input channel switching. | Diodes in series with the collector signal | ||
An internal differential signal bus connects the switched outputs of each of the input channels | of this differential amplifier are used for input channel switching. | ||
and feeds the signal to the output amplifier, which drives | An internal differential signal bus connects | ||
The output amplifier is two [[12AU6]] pentodes connected as a differential amplifier, | the switched outputs of each of the input channels | ||
followed by a [[12AT7]] dual triode acting as a cathode follower to drive the output with a relatively low impedance. | and feeds the signal to the output amplifier, | ||
which drives pins 1 and 3 of the [[500-series plug-in connector]]. | |||
The output amplifier is two [[12AU6]] pentodes | |||
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. | |||
==Pictures == | |||
<gallery> | <gallery> | ||
Type_m_front.jpg|Late Type M Front view. | |||
Type_m_left.jpg|Late Type M Left view. | |||
Type_m_right.jpg|Late Type M Right view | |||
Tek_early_m_front.jpg|Early Type M Front | |||
Tek early m left.jpg|Early Type M Left | |||
Tek early m right.jpg|Early Type M Right | |||
Tek m 501 1.jpg | |||
Tek m 501 2.jpg | |||
Tek m 501 3.jpg | |||
Tek m 501 4.jpg | |||
Tek m 501 5.jpg | |||
Tek m 501 6.jpg | |||
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 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 sn 2760-up.png|Four Channel Switched Amplifier Schematic, sn 2760 and above | |||
tek_type_m_in_556.jpg|Type M in [[556]] | |||
</gallery> | </gallery> | ||
[[Category:500 series plugins]] |