• Country
• United States of America (USA)

• Manufacturer / Brand
• Tektronix; Portland, OR

• Year
• 1974

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 304580

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

• Wave bands
• - without

• Power type and voltage
• Direct Current supply (DC) / 5 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Word recognizer 821 - Tektronix; Portland, OR

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 137 x 49 x 115 mm / 5.4 x 1.9 x 4.5 inch

• Notes

• Versatile 4-bit TTL word recognizer for triggering an oscilloscope.

  0, 1 or X selection for each logic input and output.
  Provision for positive or negative external strobe.
  'Word latch on to the affirmative' and 'display the negative' functions.
  Recognize and drive modes.
  Outputs drive 6 TTL loads each; X selection opens the probe line.
  LED input and output indicators.
  Four 821 word recognizers can be cascaded for a 16-bit word length.

  Powered from oscilloscope probe outlet (4-pin Lemo S-series connector) or from 5v DC supply.

• Net weight (2.2 lb = 1 kg)
• 0.350 kg / 0 lb 12.3 oz (0.771 lb)

• Price in first year of sale
• 200.00 USD

• Author
• Model page created by Bruce Taylor. See "Data change" for further contributors.

• Other Models

• Here you find 386 models, 374 with images and 92 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tektronix; Portland, OR