7B80: Difference between revisions

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==Modifications==
The 7B80MODWJ is a 7B80 timebase having various controls removed
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Tek_7B80_modwj.jpg | 7B80MODWJ Front view
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Revision as of 09:38, 4 December 2021

Tektronix 7B80
400 MHz Timebase
Tektronix 7B80 Timebase plug-in with Option 2

Compatible with 7000-series scopes

Produced from 1976 to 1990

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

The Tektronix 7B80 is a 400 MHz single time base plug-in without delay function for 7000-series scopes, typically the 7800 Series, e.g. 7844. It uses the 155-0126-00 trigger amplifier followed by the 155-0109-01 trigger detector.

Option 2 adds support for X-Y mode via a "Display mode" switch (pictured). When X-Y mode is selected, the X-axis signal is taken from the internal trigger path.

The companion delaying timebase for use in 4-slot mainframes is the 7B85.

The 7B80 uses the ±50 V supplies from the mainframe.

Key Specifications

Sweep 10 ns/Div to 5 s/Div (1-2-5), ×10 magnifier (down to 1 ns/Div), variable sweep (up to ×2.5) and holdoff (up to ×2 sweep lengths at 20 ms/Div and faster)
Excluded sweep First 10 ns in 78xx, 79xx; First 20 ns in 77xx; First 50 ns in other mainframes
Trigger 50 mV or 0.3 Div up to 50 MHz, 250 mV or 1.5 Div up to 400 MHz; AC >30 Hz, LF REJ >30 kHz, HF REJ <50 kHz
Jitter <100 ps at 400 MHz
Ext. Trigger Max. 250 V DC+peak AC, 1 MΩ // 20 pF
Sweep/Trigger Modes Peak-Peak Auto, Auto, Norm, Single Sweep

Links

Prices

Year 1977 1980 1984 1987 1990
Catalog price $745 $1,000 $1,485 $1,660 $2,080
In 2021 Dollars $3,400 $3,400 $4,000 $4,000 $4,400

Pictures

Modifications

The 7B80MODWJ is a 7B80 timebase having various controls removed

Custom ICs used in the 7B80

Page Model Part nos Description Designers Used in
155-0049-00 M079G 155-0049-00 155-0049-01 155-0049-02 sweep control with lockout Bill DeVey 335 464 465 466 475 475A 475M 485 5B31 5B40 5B52 5B42 5B44 7B53A 7B80 7B85 7B87 7B92A 7B90P 7B10 7B15 SC502 7B42N AN/USM-281C 067-0657-00
155-0109-00 M120B 155-0109-00 155-0109-01 trigger Gary Vance 5B25N 5B31 5B40 5B42 5B44 5S14N 7B50A 7B53A 7B80 7B85 7B87 7B81P 7B90P 7S14 7612D SC502 SC503 SC504
155-0126-00 M121 155-0126-00 trigger source selector and P-P auto amplifier Art Metz 7B50A 7B80 7B85 7B87 7B81P 7B90P