Vivax Metrotech Loc3-10Tx, Тренировка

Страница: 180 / 185

180
Glossary
Active Locate A locate where a transmitter is used to apply a signal to a buried pipe or cable,
the position of which is then located by a receiver tuned to the same frequency.
Active Signal A signal applied by the locator transmitter to a buried line. Typical this is a very
precise frequency.
Attenuation The reduction of an electromagnetic signal from a pipe or cable.
Clamp (or Coupler) An accessory used to apply the transmitter signal to an insulated line, removing
the need to connect the transmitter signal directly to a conductor or cable
sheath.
Coupling The act of signals transferring to lines to which they were not originally applied.
Coupling can be “direct” where the target line has an electrical connection to
another line, or “induced” where the signal radiates from the target line to
another line or lines.