The Tektronix 7B51 is a 100 MHz delaying timebase for 7000-series scopes. The matching non-delaying timebase is the 7B50.

Tektronix 7B51
100 MHz Timebase
7B51 front

Compatible with 7000-series scopes

Produced from 1969 to 1973

(All manuals in PDF format unless noted otherwise)

The task of designing the 7B51 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
Variable time delay accuracy 1% (0.5 ms/Div to 1 μs/Div)
Variable time delay multiplier Linearity within 0.2%


Documents Referencing 7B51

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

Patents that may apply to 7B51

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
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