långvågssändningar

Långvågssändningar refer to radio transmissions in the longwave frequency band, typically ranging from 150 kHz to 285 kHz. This band is characterized by its ability to propagate signals over very long distances, especially during nighttime, due to atmospheric refraction. Historically, longwave was crucial for international broadcasting and navigation systems.

One of the primary uses of longwave today is for broadcasting, particularly in Europe. Many national broadcasters use longwave to transmit their signals over wide geographical areas, ensuring reception even in remote regions or when other transmission methods are unavailable. Due to the wide coverage, a single longwave transmitter can serve an entire country.

In terms of technical characteristics, longwave signals are less susceptible to fading than higher frequency bands, although they can be affected by atmospheric noise. The bandwidth allocated for longwave broadcasting is relatively narrow, which limits the audio quality compared to modern digital broadcasting standards. However, the reliability and extensive coverage make it a valuable medium for certain applications.

Beyond broadcasting, longwave frequencies have also been utilized for specialized services such as time signal transmissions and navigation beacons. The development of satellite communication and digital broadcasting has led to a decline in the widespread use of longwave for general programming in many parts of the world, but it continues to play a role in specific broadcasting and navigational contexts.