Difference between revisions of "7M11"

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7M11 is a plug-in which contains two independent 50 Ohm analog delay lines with 75nS each. Risetime is specified as max. 175pS and attenuation is fixed at two. A separate trigger output is available to eliminate an external power splitter and it is attenuated by a factor of five. The connections are 50-ohm
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{{Plugin Sidebar 2 |
[[Connectors#GR-874|GR-874]].
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title=Tektronix 7M11 |
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summary=Dual Delay Line |
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image=Tek-7m11-front.jpg |
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caption=7M11 front panel |
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introduced=1969 |
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discontinued=1988 |
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series=[[7000-series scopes]]|
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manuals=
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* [[Media:7M11-Instruction-OCR.pdf|7M11 Manual]] (OCR PDF, 2.5MB)
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}}
  
Max. signal allowed is +-5V. Mass is about 2.5kg, so be careful when sliding it into the slot. Generally Tektronix specifies not to ship mainframes with
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The '''Tektronix 7M11''' is a plug-in which contains two independent 50 Ω, 75 ns analog delay lines.  
inserted plug-ins, to protect the bus connectors!
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Rise time is specified as 175 ps maximum, and attenuation is fixed at 2:1.  
 +
 
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Delay line connections are 50 Ω [[GR-874]].
  
Because it is completely passive and has no bus contacts, it can be operated outside of the mainframe on the desk, giving free an additional slot for another plug-in.
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To eliminate an external power splitter, a separate trigger output is available through a [[BNC connector]]
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at 5:1 attenuation (line 1 or 2 switch selectable).
  
[[Image:7M11.jpg|200px|thumb|left|Connectors were changed to BNC with adequately quality]]
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The maximum signal allowed is ±5 V.
 +
The mass of the 7M11 about 2.5 kg (5.5 lb), so one must be careful when sliding it into the slot.
 +
(Generally, Tektronix specifies not to ship mainframes with inserted plug-ins, to protect the bus connectors!)
 +
 
 +
Because it is completely passive and has no bus contacts, the 7M11 can be
 +
operated outside of the mainframe on the desk, freeing a slot for another plug-in.
 +
Tek originally made a carrying enclosure (437-0106-00) to hold a 7M11 for desk use.
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The interface between the GR-874 input connector and the trigger pickoff board is described in [https://www.google.com/patents/US3426311 US Patent 3,426,311], and is similar to the ones in the [[S-1]] and [[S-2]] samplers.
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{{BeginSpecs}}
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{{Spec | Delay | 75 ns (each channel) }}
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{{Spec | Delay difference | max. ±30 ps between channels}}
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{{Spec | Rise time | 185 ps }}
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{{Spec | Attenuation | 2:1 (6 dB) on main outputs, 5:1 (14 dB) on trigger pick-off }}
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{{Spec | Input voltage | ±5 V, max. }}
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{{Spec | Weight | 2.6 kg (!) }}
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{{EndSpecs}}
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==Links==
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* [[Media:Tekscope 1970 V2 N1 Feb 1970.pdf | Tekscope Vol. 2 No. 1, Feb 1970]]
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* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/7M11.html Tek 7M11 @ amplifier.cd]
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* [http://www.barrytech.com/tektronix/tek7000/tek7m11.html Tek 7M11 @ barrytech.com]
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* [http://www.analogdesign.be/vintage-gear/tektronix-7m11-delay-line Tek 7M11 @ analogdesign.be]
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==Pictures==
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<gallery>
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Tek-7m11-front.jpg | Front
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Tek-7m11-right.jpg | Right side
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Tek-7m11-fr.jpg    | front components detail, right side
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Tek-7m11-fl.jpg    | front components detail, left side
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7M11.jpg          | In this specimen, the GR874 connectors were replaced by BNC connectors of adequate quality
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7m11-circuit.png  | 7M11 circuit diagram
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7M11_schem_corr.jpg | Correction R33 value
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</gallery>
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[[Category:7000 series special-function plugins]]
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[[Category:Delay lines]]
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[[Category:GR874]]

Revision as of 03:38, 24 March 2021

Tektronix 7M11
Dual Delay Line
7M11 front panel

Compatible with 7000-series scopes

Produced from 1969 to 1988

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 7M11 is a plug-in which contains two independent 50 Ω, 75 ns analog delay lines. Rise time is specified as 175 ps maximum, and attenuation is fixed at 2:1.

Delay line connections are 50 Ω GR-874.

To eliminate an external power splitter, a separate trigger output is available through a BNC connector at 5:1 attenuation (line 1 or 2 switch selectable).

The maximum signal allowed is ±5 V. The mass of the 7M11 about 2.5 kg (5.5 lb), so one must be careful when sliding it into the slot. (Generally, Tektronix specifies not to ship mainframes with inserted plug-ins, to protect the bus connectors!)

Because it is completely passive and has no bus contacts, the 7M11 can be operated outside of the mainframe on the desk, freeing a slot for another plug-in. Tek originally made a carrying enclosure (437-0106-00) to hold a 7M11 for desk use.

The interface between the GR-874 input connector and the trigger pickoff board is described in US Patent 3,426,311, and is similar to the ones in the S-1 and S-2 samplers.

Specifications

Delay 75 ns (each channel)
Delay difference max. ±30 ps between channels
Rise time 185 ps
Attenuation 2:1 (6 dB) on main outputs, 5:1 (14 dB) on trigger pick-off
Input voltage ±5 V, max.
Weight 2.6 kg (!)

Links

Pictures