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Tektronix DM40
DMM top for 464/465/466/475
Tektronix DM40 on a 475

Compatible with 464

Produced from 1975 to (?)

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix DM40 is a digital multimeter module that attaches to the top of the 464, 465, 466, and 475.

It was later replaced by the DM44.