Lo mismo que vetorscopio o un monitor de forma de onda es un instrumento similar al osciloscopio en el sentido de que utiliza un tubo de rayos catódicos en las primeras versiones, pero tiene entradas para los ejes X e Y, proporcionando una imagen que es la composición de las señales de las dos entradas, o es decir, no tiene escaneo. Un osciloscopio ordinario puede funcionar en modo vectorial si lo ponemos en modo X-Y sacando los barridos. También se llama monitor de forma de onda.

   En la figura 1 tenemos la forma de señal presentada al analizar una señal de video NTSC.

 

 Figura 1 - Señal X-Y
 Figura 1 - Señal X-Y

 

   Tenga en cuenta que la forma de la retícula circulante le permite analizar tanto la amplitud de las señales como su fase, lo cual es especialmente interesante al analizar señales complejas.

   En la figura 2 tenemos un viejo vectorscópio.

 

Figura 2 - Vetorscope Tectronix 521A de 1967.
Figura 2 - Vetorscope Tectronix 521A de 1967.

 

  Una aplicación importante de este instrumento es el análisis de señales de audio estéreo. En este análisis, un canal aplica la señal en un eje y otro en el otro eje. De esta manera puede analizar la diferencia entre las dos señales.

   Los osciloscopios comunes en modo de funcionamiento X-Y pueden considerarse vectoresoscopios.

   En la Figura 3, un vetorscopio para el análisis de PAL.

 

Figura 3 - Vetorscope analizando la señal PAL
Figura 3 - Vetorscope analizando la señal PAL

 

 

 

 

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