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Tektronix 3S3
Sampling plug-in
3S3 front view

Compatible with 560-series scopes

Produced from 1963 to (?)

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

The Tektronix Type 3S3 is a sampling plug-in for 560-series scopes.

It requires P6038 probes which contain miniature sampling gates. Risetime is rated at 350 picoseconds.

The sampling gates use four GaAs sampling diodes. The sampling pulse is produced by the Gate Generator module in the plug-in using a blocking oscillator driving a 152-115 step recovery diode and a 6.5 cm clipping line. Balanced pulses are sent up the cable to the sampling gate. The output of the sampling gate returns to the plug-in through the same cable, and enters the preamp. The same blocking oscillator that generates the sampling pulses also generates the strobe for the memory circuit. The sampling efficiency is specified to be 2%.

The 3S3 is recommended in the Type 111 manual for checking the output pulse risetime.

The 3S3 has a main chassis and sub-chassis that plug into it. There is a sub-chassis extension, part number 012-077, that allows maintenance of the sub-chassis.

Key Specifications

Rise time 350 ps
Bandwidth 1 GHz

please extend


Some Parts Used in the 3S3

Page Class Description Used in
8056 Vacuum Tube (Triode) low-voltage Nuvistor triode 422 502 W 1S1 3A7 3S3 3T4 5T3 10A1