7B71

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Tektronix 7B71
200 MHz Delaying Timebase
Tektronix 7B71 Timebase plug-in

Compatible with 7000-series scopes

Produced from 1969 to 1975

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

The Tektronix 7B71 Delaying Time Base is a 200 MHz time base plug-in for 7000-series scopes. It was designed by Murlan Kaufman.

The 7B71 contains a delay function to control a "B" horizontal plug-in in four-slot mainframes, typically a model 7B70. It has no provision for X-Y mode.

The 7B70/7B71 were primarily intended for the 7704 mainframe. They were superseded by the 7B85/7B80 pair (400 MHz) in 1976, which increased the frequency range to 400 MHz and added digital read-out of the delay time.

Key Specifications

Sweep 5 s/Div to 20 ns/Div in 1−2−5 sequence, ×10 magnifier down to 2 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 75 mV (ext) up to 20 MHz, 1.5 Div or 375 mV from 20 MHz to 200 MHz
Trigger coupling DC, AC (>30 Hz), AC HF REJ (30 Hz to 50 kHz), AC LF REJ (>30 kHz)
Trigger input 1 MΩ // 20 pF, max. 500 V DC+peak AC
Jitter less than 1 ns at 150 MHz
Trigger Modes Peak-Peak Auto, Auto, Norm, Single Sweep
Variable time delay accuracy 1% (0.5 s/Div to 1 μs/Div)
Variable time delay multiplier Linearity within 0.2%

Links

Documents Referencing 7B71

Document Class Title Authors Year Links
Tekscope 1969 V1 N5 Oct 1969.pdf Article Introducing the New Generation 1969
Tekscope 1969 V1 N6 Dec 1969.pdf Article A New Logic for Oscilloscope Displays 1969
7000 series brochure March 1973.pdf Brochure 7000 series brochure, March 1973 1973
Tekscope 1974 V6 N4.pdf Article Troubleshooting the 7B70 and 7B71 Time Bases Jim Lawe 1974

Internals

The 7B71 contains five 148-0034-00 miniature relays and one 148-0035-00. It also contains one 152-0154-00 and two 152-0125-00 tunnel diodes.

Pictures