From TekWiki
Jump to navigation Jump to search
Tektronix 7B80
400 MHz Timebase
Tektronix 7B80 Timebase plug-in with Option 2

Compatible with 7000-series scopes

Produced from 1976 to 1990

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.


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