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Índice Página
1. Radiotecnología 81
2. Sincronización horaria automática 84
3. Funciones 87
3.1 Indicador de la hora 88
3.2 Indicador de la fecha 88
4. Indicador de recepción 89
5. Sincronización manual (llamada al emisor) 89
5.1 Búsqueda automática de emisores 91
6. Ajustes 93
6.1 Ajuste de la zona horaria 93
6.2 Ajuste del idioma 93
6.3 Indicador de 12 ó 24 horas 94
6.4 Ajuste del contraste 94
7. Reinicio / puesta en funcionamiento después de cambiar la pila 95
7.1 Inicio manual 96
8. Iluminación 98
9. Disponibilidad de funcionamiento 99
10. Indicaciones generales 100
11. Información técnica 100
12. Estanqueidad 101
1. Radiotecnología
La forma más moderna de medir el tiempo.
Han pasado 5.000 años desde que se empezó a medir el tiempo con
varillas solares, después con relojes de agua, más tarde con los relojes
mecánicos del siglo XIII y, finalmente, con los relojes de cuarzo, hasta
llegar al reloj de pulsera radiocontrolado de Junghans. Un reloj que, si
las condiciones de recepción son buenas, nunca va mal y nunca se tiene
que poner en hora. El reloj radiocontrolado de Junghans es absoluta-
mente preciso, porque se conecta por radio con el patrón de tiempo de
los relojes más precisos del mundo. En Europa, es la base de tiempo
cesio del Physikalisch-Technischen Bundes anstalt (PTB) de
Braunschweig. En Japón es el reloj cesio del Instituto Nacional para
Tecnología de Información y Comunicación (NICT), una división de la
administración de autoridad pública. En Norteamérica es la base de
tiempo cesio del U.S. Department of Commerce, del National Institute
of Standards and Technology (NIST) de Boulder, Colorado. Estos relojes
son tan precisos, que en 1 millón de años se pueden retrasar o adelantar
1 segundo.
29


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