Placement of the AD 650

Align the radio signal receiver with the front cover (using screws) or the rear surface pointing towards the DCF Mainflingen transmitter (approximately to the west). If the DCF reception is of good quality, the time base on the connected clocks will synchronize automatically within a few minutes. In the case of poor reception (especially during the day), the initial setup must be performed manually so that the LED blinks regularly.

Like any radio receiver, the DCF radio signal receiver is subject to disruptive and attenuating influences. Their impact increases with the distance from the DCF transmitter in Mainflingen and the presence of the following factors:

• metal cladding of buildings and rooms, metal structural elements (beams, reinforcement, roofs)

• strong walls and insulation, basement and cellar spaces

• inappropriate local geographical conditions (difficult to predict in advance)

• atmospheric disturbances, storms

• unshielded electrical appliances

• televisions and computers located near the DCF radio receiver