7M11

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

A separate trigger output is available to eliminate an external power splitter. Signal through the trigger pick-off output is attenuated by a factor of five. Delay line connections are 50 Ω GR-874, trigger pickoff is through a BNC connector at 5:1 attenuation (line 1 or 2 switch selectable).

The maximum signal allowed is +/- 5V. The mass of the 7M11 about 2.5 kg (5.5 lb), so 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.

Key Specifications

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

Links

• Tekscope Vol. 2 No. 1, Feb 1970
• Tek 7M11 @ amplifier.cd
• Tek 7M11 @ barrytech.com
• Tek 7M11 @ analogdesign.be

Pictures

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  Front

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  Right side

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  front components detail, right side

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  front components detail, left side

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  In this specimen, the GR874 connectors were replaced by BNC connectors of adequate quality