• Country
• Guernsey

• Manufacturer / Brand
• Tektronix Guernsey Ltd. ; St.Peter Port

• Year
• 1976–1990 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 320692

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Time Base 7B80 - Tektronix Guernsey Ltd. ; St.

• Shape
• Chassis only or for «building in»

• Notes

• 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.

  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

• 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)

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

• Other Models

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