Coaxial Frequency Meter 537A

Hewlett-Packard, (HP); Palo Alto, CA

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  • Année
  • 1972
  • Catégorie
  • Appareils de mesure et de dépannage (matériel de labo)
  • Radiomuseum.org ID
  • 338595

 Spécifications techniques

  • Principe général
  • Circuit HF séparé (passe-bande/bouchon) ou antenne avec ampli.
  • Gammes d'ondes
  • Bandes en notes
  • Tension / type courant
  • Pas d'alimentation nécessaire
  • Haut-parleur
  • - - Pas de sortie basse fréquence
  • Matière
  • Boitier métallique
  • De Radiomuseum.org
  • Modèle: Coaxial Frequency Meter 537A - Hewlett-Packard, HP; Palo Alto
  • Forme
  • Formes diverses décrites en notes
  • Dimensions (LHP)
  • 118 x 146 x 89 mm / 4.6 x 5.7 x 3.5 inch
  • Remarques

  • The Hewlett Packard, 537A coaxial frequency meter is used for measuring frequency in the 0.96 to 12.4 GHz range.

    Accuracy is obtained from the spiral scale.

    The meter contains a coaxial line coupled to a quarter-wavelength coaxial resonant cavity loaded with capacitance at the bottom of the band. At resonance, power is absorbed by the cavity, producing a dip in the coaxial line power.
    The frequency at which this dip occurs is read directly from the dial in gigahertz.

    Tuning is accomplished by moving a piston. A precision lead screw, which is spring-loaded to prevent backlash, is used to position the piston in the cavity.

    Due to the design of the cavity, its electrical length is extended at lower frequencies, and there are no spurious modes.

    Specifications

    Frequency range;   3.7 to 12.4 GHz
    Reflection coefficient off-resonance: 0.33 (2.0 SWR, 9.5 dB return loss)
    Calibration increments: 10 MHz
    Dip at resonance:

    1 dB (minimum)
    Dial accuracy:   ±0.1%
    Overall Accuracy:

    ±0.17% which includes an allowance of ±0.02% for 0 to 100% relative humidity, ±0.0016 per °C from 13 to 33 °C & 0.03% backlash.

     

  • Poids net
  • 3.5 lb (3 lb 8 oz) / 1.589 kg
  • Littérature
  • - - Manufacturers Literature (536A / 537A Coaxial Frequency Meter Operating Note. No. 00536-90001)
  • Auteur
  • Modèle crée par Gary Cowans. Voir les propositions de modification pour les contributeurs supplémentaires.

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