Meinberg PZF511 - Manual (Page 8)

8
Front panel
Pilot lamps
The 'Feld'-LED is switched on if a DCF-signal with at least minimum field strength
needed for the correlation receiption is detected at the input of the receiver.
The 'Syn.'-LED indicates that the autocorrelation coefficient decreases beyond a value
that is needed and a correct receiption is not possible therefore. This happens if a strong
interferer within the bandwidth of the receiver is present or the transmitter is switched of.
If the 'Freil.'-LED is on, it was not possible to synchronize the internal realtime clock
to DCF-time. This condition occures for at most two minutes after switching on the
PZF511, because two DCF-telegrams are checked for plausibility before the data is
taken over. Short disturbance of receiption can cause this state too.