Table of contents Impressum .................... 2 General Information about DCF77 ............4 General information about position of antenna ........5 Features of FM614 ................5 Front panel layout ................6 Handling of FM614 ................6 Technical specification FM614 ............7...
General Information about DCF77 Like radio remote clocks the field strength meter FM614 receives the signal from the long wave transmitter DCF77. This long wave transmitter installed in Mainflingen near Frankfurt/Germany transmits the reference time of the Federal Republic of Germany.
This state is signalled by a LED, overcharging is not possible. If the FM614 often runs in accu supply mode, the accumulators should be discharged (unplugg power supply cable and switch into accu supply mode) at times to avoid the loss of capacity.
The antenna shouldn't be connected to carry out this test. d) Measurement of field strength The antenna AI01 has to be connected to the input of FM614 by using the coaxial cable to perform this test. By varying the position of the antenna or the alignment to the transmitter, the maximum of field strength can be found.
If the FM614 isn't in use for a longer period, it should be stored with switch position "AC-Line" to avoid deep-discharging of the internal accus. Technical specification FM614 Indicating range: output level of antenna: -100 dbm to -30 dbm Measuring precision: AC power supply: 230V/0.5W...
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