7M11

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Tektronix 7M11
Dual Delay Line
7M11 front panel

Compatible with 7000-series scopes

Produced from 1970 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 Tek originally made a carrying enclosure to hold a 7M11 for desk use.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.

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