Programmable Frequency Meter 6421 A, B

Beckman Instruments, Shasta, Shockley; Richmond (CA)

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  • Year
  • 1971
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 244996

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

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • none
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 115; 230 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Programmable Frequency Meter 6421 A, B - Beckman Instruments, Shasta,
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 10 x 5.25 x 16.75 inch / 254 x 133 x 425 mm
  • Notes

  • 525 MHz Frequency Counter
    Channel A: 10 Hz to 525 MHz
    Channel B: 10 Hz to 5 MHz
    Single Period (Channel B): Resolution 1 µs, Range 1 µs to 10 s

    Input Characteristics:
    Sensitivity:
    Channel A 50 mV rms
    Channel B 350 mV rms
    DC Blocking: 600 V
    Coupling: A&B  AC (0.05 µF into 1 MOhm)

    Display:
    Eight in-line digits are displayed on numerical glow tubes. Display includes automatically-positioned decimal point. The legend displayed is in kHz and MHz for frequency measurements, and ps, ms, s, and ks for time interval measurements.

    Model 6421A
    Same specifications as Model 6421, but with a Pulse Polarity Switch included.
    Model 6421B
    Same specifications as Model 6421, but with a slightly lower frequency measurement capability of 500 MHz instead of 525 MHz.
     

     

  • Net weight (2.2 lb = 1 kg)
  • 15 lb (15 lb 0 oz) / 6.810 kg
  • Mentioned in
  • -- Original-techn. papers.
  • Author
  • Model page created by Pius Steiner. See "Data change" for further contributors.

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