Simex SWZ-W610, Руководство пользователя

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User manual for digital clock SWZ-W610
place them far off of the noise sources. Periodical disturbances in reception can be caused by
storms. Unfortunately in unfavourable conditions, proper reception of full information can be
possible only at night, while all sources of disturbances are off.
Figure 6.2. Connection of DCF77 module to SWZ-W610
It is recommended to set „on” parameter „ diSP ” of „ dCF ” submenu. It allows to observe
DCF module output state (after connection to { DCF } input). If resting state of the module
output had been set correctly (see parameter „modE” of „ dCF ” submenu), then digital point of
most right digit flashes in time with the DCF signal bits (see Fig. 6.2). The time while LED is on
should be shorter than time while LED is dark. The additional test of correct orientation of the
aerial is number of received bits (see parameter „
Sync
” of „
dCF
” submenu). Aerial should be
oriented in that way, to allow collection of 3 full frames, every of 59 bits. If the number of
received bits is zeroed before collection of full frame, it means that signal, is to weak (or noises
are to strong) . It is recommended to change localisation and /or orientation of the aerial.
LED flashes indicating received pulses
Figure 6.3. Signalisation of DCF module output state.
If it is impossible to synchronize clock with DCF signal for 7 days (no signal, or
errors in received data) the double dot between hour and minutes will start to pulse
in asymmetrical mode (lighting time much shorter than time of dimming).
13
{DCF}
input
state
time
15 16
GND
digital output
+5V
DCF77
signal
receiver
14
i