34
BE-801372.01-Digital_clocks_manual-221114
©MOBATIME
4
NON‑NETWORK CLOCK OPERATION
Configure the position of DIP switch according to the source of synchronization (DCF position
if the source is DCF, otherwise do not configure the position for MOBATIME serial code, polarized impulse
line, MOBALine or IRIG‑B). Choose the item
o2
in SYNC MENU and set the type of synchronization.
The autodetection mode (o2: A), when the type of synchronization signal is set automatically,
is applicable for DCF signal, MOBATIME serial code, IRIG‑B. The permanently lit colon during the time
display signalizes the clock is synchronized by the synchronization source.
4.1 Autonomous clock synchronized by DCF 77 receiver
•
Set value
A
in SYNC MENU items
o1
,
o2
and in dISP MENU item
d2
.
•
Connect the DCF 77 receiver to the clock terminal board placed on the anchoring plate
(LINE IN terminals) using a twin‑wire cable.
•
The maximum wire length depends on its diameter (approx. 100–300 m).
•
In case the connection is correct and the input signal is at high level, the LED on the receiver
is flashing periodically once a second with one pulse left out at the 59
th
second.
ď
If the polarity is incorrect, the LED does not flash. In such case, interchange the two
wires.
•
Install the receiver at a place with a high‑level radio signal. Do not install the receiver near sources
of interfering signals, such as personal computers, TV sets or other types of power consumers
(the digital clock itself generates interfering signals too).
•
Position the receiver with its transparent cover (DCF 450) or the arrow on the cover (DCF 4500)
facing the transmitter (located in Frankfurt, Germany). Presuming the good quality DCF 77 signal
the synchronization takes place in approx. 3 to 4 minutes. In case of poor quality of the signal
(mainly during the day time), the first time setting is to be done manually. The red LED of the receiver
displays a working connection by flashing once a second without flickering.
4.2
Autonomous clock synchronized by GPS receiver
•
Set values
o2:10
,
o1:A
in the SYNC MENU and the desired time zone is dISP
MENU item
d2
.
•
Connect the GPS antenna to SMA connector.
•
Presuming the good position of the GPS receiver the synchronization
takes place in approx. 10 to 20 minutes.
LINE IN
clock
GPS antenna
clock frame
Summary of Contents for DSC. 250.4
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