C&E FS20 Wireless transmitter unit FS20 S4UB 4-channel Max. range (open field) 50 m 57125 データシート

• The FS20 wireless control system works in the 868MHz range, which is also used by other

radio services. Therefore devices that operate on the same or neighbouring frequencies
may restrict both its operation and its range.

• The specified range of up to 50m is the free-field range, which means the range with visual

contact between the transmitter and receiver. In practice, however, walls, ceilings, etc.
between the transmitter and the receiver may affect and reduce the range.

• All types of high-frequency interference

• Any buildings or vegetation

• Conductive metal parts that are located near the devices or within or near their transmission

path, for example, radiators, metallised insulation glass windows, reinforced concrete
ceilings, etc.

• Influence on the radiation pattern of antennas due to the distance from the transmitter or

receiver to conductive surfaces or objects (also to human bodies or the ground)

• Broadband interference in urban areas that reduces the signal-to-noise ratio; the signal is

no longer recognised due to this ‘noise’

• Interference radiation resulting from insufficiently shielded electronic devices, for example,

operating computers or similar