3T7

Manuals – Specifications – Links – Pictures

The Tektronix 3T7 is a sampling timebase and pulser plug-in for 560-series scopes, introduced in 1971.

When used with a 3S7, a TDR system is formed.

The pulse is produced by a 21 mA, 1.5 pF tunnel diode, CR587, made by GE with Tektronix part number 152-0489-00.

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

The 3T7 uses a CA3051 dual amplifier chip.

Key Specifications

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Links

Documents referencing 3T7

Document	Class	Title	Authors	Year	Links
062-1244-00.pdf	Book	Measurement Concepts: Time-Domain Reflectometry Measurements	James A. Strickland • Al Zimmerman • Gordon Long • George Frye	1969	Time domain reflectometers • 3S7 • 3T7

Patents that may apply to 3T7

Page	Title	Inventors	Filing date	Grant date	Links
Patent US 3426311A	Transition device	Ross W Gifford	1966-06-16	1969-02-04	7M11 • 3S7 • 3T7 • 4S2 • 035-5031-00

Pictures

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  3T7

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  Pulse generator output schematic

Components

Some Parts Used in the 3T7

Part	Part Number(s)	Class	Description	Used in
152-0489-00	152-0489-00	Discrete component	21 mA, 1.5 pF tunnel diode	1502 • 3T7
155-0035-00	155-0035-00 • 155-0116-00	Monolithic integrated circuit	quad op-amp	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
1N3182	152-0269-00	Discrete component	varactor diode	3L5 • 1L5 • 3T7 • 492 • 465M • 7844 • 2465
CA3051	156-0095-00	Monolithic integrated circuit	dual darlington differential amplifier	3T7
STD962	152-0169-00	Discrete component	1 mA, 10 pF tunnel diode	L140 • Pentrix L20 • Pentrix L30 • 067-0518-00 • 067-0594-00 • 1L60 • 1S2 • 1503 • 3B5 • 3T7 • 4054 • 4054A • 4902 • 5S14N • 7S14 • 7T11