VHF Frequency Meter FM-6

Wayne Kerr; New Malden, England

Datos
Foro
Imágenes
Colecciones

  • Año
  • 1962 ?
  • Categoría
  • Aparato de medida y servicio (Equipo de laboratorio).
  • Radiomuseum.org ID
  • 335586

Haga clic en la miniatura esquemática para solicitarlo como documento gratuito.

 Especificaciones técnicas

  • Gama de ondas
  • Bandas de recepción puestas en notas.
  • Tensión de funcionamiento
  • Red: Corriente alterna (CA, Inglés = AC)
  • Altavoz
  • - - No hay salida de sonido.
  • Material
  • Metálico
  • de Radiomuseum.org
  • Modelo: VHF Frequency Meter FM-6 - Wayne Kerr; New Malden,
  • Forma
  • Sobremesa apaisado (tamaño grande).
  • Anotaciones

  • A VHF frequency meter which converts easily into a frequency synthesizer 'locking up ' at
    10kHz intervals. Accuracy of the instrument is better than ±0.00001% when used with a 100MHz counter. It is a harmonic instrument with a fundamental frequency range 20 to 40MHz. The conservative upper limit for both measurement and generation is 1,000MHz, but measurements have been recorded as high as 2,400MHz.  Basic accuracy of the instrument is determined by a precise, hermetically sealed 1MHz crystal. The unit is converted to a frequency synthesizer by operating an externally mounted switch. In this form the low frequency oscillator operates as a divide-by-two stage. The 100kHz derived from the 1MHz timebase feeds into this stage, producing a 50kHz signal instead of the 40 to 50kHz variable frequency. Frequency stability and accuracy closely approach the internal 1MHz time-base or any other time-base that is used. When used in its primary form as a frequency meter, its basic circuit is simple. A heterodyne frequency meter consists of an output/input stage, beat detector, HF oscillator and buffer, and an amplifier with aural and visual detectors. Unknown signals are fed into the beat detector and compared against the fundamental or harmonic output of the HF oscillator and buffer. The resultant beat is amplified and zero is detected by means of visual and aural presentations. The HF oscillator dial is calibrated in 1MHz increments and a means of interpolating between these points provides a reading accuracy of one part per million.

  • Mencionado en
  • Electronic Engineering, volume 34 year 1962, September.
  • Autor
  • Modelo creado por Pier Antonio Aluffi. Ver en "Modificar Ficha" los participantes posteriores.

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