Tektronix Telescope 1502C Manual de usuario Pagina 77

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 126
  • Tabla de contenidos
  • SOLUCIÓN DE PROBLEMAS
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 76
Operator Tutorial
1502C MTDR User Manual
227
Q8: What is resistance?
A8: Resistance is the opposition to DC current flow, or DC voltage divided by DC
current.
Q9: What is impedance?
A9: Impedance is the total opposition (resistance plus reactance) a circuit offers
to the flow of alternating current at a given frequency.
Q10: What factors determine the resistance of a cable?
A10: The cross sectional area (gauge), length, and the type of material the
conductor is made of (usually copper).
Q11: What factors determine the impedance of a cable?
A11: Dielectric value of the insulation and geometry of the conductors.
Q12: Why should cables of the same impedance be used?
A12: Because a mismatch of impedance means a loss of energy at the mismatch.
Q13: Why is that important to us?
A13: Because a TDR displays the energy reflected back from an impedance
mismatch.
Vista de pagina 76
1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 125 126

Comentarios a estos manuales

Sin comentarios