7B50

The Tektronix 7B50 is a timebase plug-in for 7000-series scopes, particularly the 7500 series, introduced in 1969. It is specified for triggering up to 100 MHz. Triggering uses tunnel diodes. The sweep is fully discrete, no ICs. It was replaced by the 7B50A in 1976.

Tektronix 7B50
100 MHz Timebase 7B50 front Compatible with 7000-series scopes Produced from 1969 to 1975 Manuals Tektronix 7B50 Manual (OCR) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The task of designing the 7B50 was inherited and completed by Murlan Kaufman.

Key Specifications

Sweep	5 s/Div to 50 ns/Div in 1−2−5 sequence, ×10 magnifier down to 5 ns/Div, variable down to 12.5 s/Div
Excluded portions of sweep	None in 7700-series, first 50 ns with magnifier
Trigger sensitivity	0.3 Div (int) or 150 mV (ext) up to 10 MHz, 1.5 Div or 750 mV from 10 MHz to 100 MHz
Trigger coupling	DC, AC (>16 Hz), AC HF REJ (16 Hz to 100 kHz), AC LF REJ (>75 kHz)
Trigger input	1 MΩ // 20 pF max. 500 V DC+peak AC
Jitter	less than 1 ns at 75 MHz
Trigger Modes	Peak-Peak Auto, Auto, Norm, Single Sweep
External horizontal amplifier	90 mV/Div or 900 mV/Div ranges, 10:1 variable

X-Y operation

The 7B50 has a dedicated switch to put it in "amplifier mode" for X-Y operation. In this mode, the Trigger Source switch controls the signal source – internal from a vertical plug-in via the trigger path, or external — and the Trigger Coupling switch controls AC vs. DC coupling. In amplifier mode, gain can be varied using an uncalibrated potentiometer.

Links

Documents Referencing 7B50

Document	Class	Title	Year	Links
Tekscope 1969 V1 N5 Oct 1969.pdf	Article	Introducing the New Generation	1969	7000-series scopes • 7504 • 7704 • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A22 • 7S11 • 7M11 • 7B50 • 7B51 • 7B70 • 7B71 • 7T11 • R5030 • 7000 series readout system • Miniature relays • Cam switches • Industrial Design • T7500 • T7700 • P6052 • P6053 • C-50 • C-51 • 204-2
Tekscope 1969 V1 N6 Dec 1969.pdf	Article	A New Logic for Oscilloscope Displays	1969	7000-series scopes • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A22 • 7B50 • 7B51 • 7B70 • 7B71 • 7S11 • 7T11 • 7504 • 7704
7000 series brochure March 1973.pdf	Brochure	7000 series brochure, March 1973	1973	7A11 • 7A12 • 7A13 • 7A14 • 7A15A • 7A16A • 7A17 • 7A18 • 7A19 • 7A21N • 7A22 • 7B50 • 7B53A • 7B70 • 7B71 • 7B92 • 7CT1N • 7D11 • 7D13 • 7D14 • 7D15 • 7M11 • 7L12 • 7S11 • 7S12 • 7T11 • 7704A • R7704 • 7904 • R7903 • 7603 • R7603 • 7403N • R7403N • 7313 • R7313 • 7613 • R7613 • 7623 • R7623 • P7001

Patents that may apply to 7B50

Page	Title	Inventors	Filing date	Grant date	Links
Patent US 3562464A	Cam actuated switch having movable and fixed contacts on circuit board	Howard Vollum • Willem H Verhoef • Tony Sprando	1968-10-07	1971-02-09	Cam switches • 2101 • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A15N • 5A18N • 5A20N • 5A21N • 5A38 • 5A45 • 5B10N • 5B12N • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AF501 • AM502 • AM503 • DC502 • DC503 • DC504 • DC505 • DM501 • DM502 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • PG501 • PG502 • PG505 • PG506 • PG506A • PG508 • TG501 • SC502 • SC503 • SC504
Patent US 3584174A	Push-button switch apparatus having cam actuated switch contacts and selective illumination means	Tony Sprando • Peter S Winkelmann	1969-06-09	1971-06-08	Back-lit switches • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A16P • 7A22 • 7A42 • 7B42N • 7B50 • 7B51 • 7B52 • 7B53A • 7B70 • 7B71 • 7B92 • 7B92A • 7D10 • 7D11 • 7D12 • 7D114 • 7D15 • 7D20 • 7F10 • 7L5 • 7L12 • 7L13 • 7L14 • 7L18 • 7M13 • 7S11 • 7S12 • 7T11 • 067-0587-00 • 067-0587-01 • 067-0587-02 • 067-0587-10

Pictures

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