Exfo AXS-100 Series OTDR Manual de usuario Pagina 14

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 155
  • Tabla de contenidos
  • SOLUCIÓN DE PROBLEMAS
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 13
Introducing the AXS-100 Series OTDR
6 AXS-100 Series
OTDR Basic Principles
OTDR Basic Principles
An OTDR sends short pulses of light into a fiber. Light scattering occurs in
the fiber due to discontinuities such as connectors, splices, bends, and
faults. An OTDR then detects and analyzes the backscattered signals. The
signal strength is measured for specific intervals of time and is used to
characterize events.
The OTDR calculates distances as follows:
where
c = speed of light in a vacuum (2.998 x 10
8
m/s)
t = time delay from the launch of the pulse to the reception of the
pulse
n = index of refraction of the fiber under test (as specified by the
manufacturer)
Distance
c
n
-- -
t
2
-- -
×=
Distance
Vista de pagina 13
1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 154 155

Comentarios a estos manuales

Sin comentarios