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Tektronix 3S7
Sampling plug-in
Tektronix 3S7 front

Compatible with 560-series scopes

Produced from 1971 to 1973

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

The Tektronix Type 3S7 is a sampling plug-in, introduced in 1971, for 560-series scopes such as the 561 and 564.

Used with the 3T7, a TDR system is formed. The 3S7/3T7 are seen on the front cover of the Tektronix TDR Measurement Concepts book. Like the 1S2, the connectors on the 3S7/3T7 are 50 Ω GR-874 connectors. A short coaxial cable carries the pulse from the front panel output of the 3T7 to the front panel input of the 3S7, where it passes through the sampling gate and out to the cable or network under test.

The interface between the GR-874 connector and the printed circuit board is described in US Patent 3,426,311.


please add


Custom ICs used in the 3S7

Page Model Part nos Description Designers Used in
155-0035-00 M053B 155-0035-00 155-0116-00 quad op-amp Mike Metcalf 3110 3S7 3T7 492 492A 492AP 492P 494 494P 496 496P 4010 4011 4012 4013 7L5 7L12 7L13 7L14 7L18 7S11 7T11 7S12 S-6 1461 4602 P7001 613 653