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Time Base 7B80

Time Base 7B80; Tektronix Guernsey (ID = 2579972) Equipment
Time Base 7B80; Tektronix Guernsey (ID = 2518469) Equipment Time Base 7B80; Tektronix Guernsey (ID = 2518470) Equipment
Time Base 7B80; Tektronix Guernsey (ID = 2518471) Equipment
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Time Base 7B80; Tektronix Guernsey (ID = 2518469) Equipment
Tektronix Guernsey: Time Base 7B80 [Equipment] ID = 2518469 1184x2100
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For model Time Base 7B80, Tektronix Guernsey Ltd. ; St.Peter Port
Country:  Guernsey
Manufacturer / Brand:  Tektronix Guernsey Ltd. ; St.Peter Port
Year: 1976–1990 ? Category: Service- or Lab Equipment
Semiconductors (the count is only for transistors) Semiconductors present.
Wave bands - without
Power type and voltage Powered by external power supply or a main unit.
Loudspeaker - - No sound reproduction output.
Power out
from Model: Time Base 7B80 - Tektronix Guernsey Ltd. ; St.
Material Metal case
Shape Chassis only or for «building in»

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.


Sweep10 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 sweepFirst 10 ns in 78xx, 79xx; First 20 ns in 77xx; First 50 ns in other mainframes
Trigger50 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. TriggerMax. 250 V DC+peak AC, 1 MΩ // 20 pF
Sweep/Trigger ModesPeak-Peak Auto, Auto, Norm, Single Sweep
Price in first year of sale 3'922.00 CHF
Mentioned in -- Original prospect or advert (Prospect & pricelist 1986)
Literature/Schematics (1) - - Manufacturers Literature (Instruction manual 7B80 first printing Dec 1975)

Model page created by Detlef Boeder. See "Data change" for further contributors.

All listed radios etc. from Tektronix Guernsey Ltd. ; St.Peter Port
Here you find 5 models, 5 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.