Mobatime DT.100.1C.1T, Инструкция по эксплуатации, Страница: 13 / 40

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3 Setting of time synchronization type
Configure the jumper JP11 according to table (chapter 2.7.) if the source of synchronization is
DCF signal, Mobatime serial code, polarized impulse line, MOBALine or IRIG-B. Choose the
item
P4 in main MENU (chapter 7) and set the type of synchronization. The auto detection
mode (P4:A), when the type of synchronization signal is set automatically, is applicable for
DCF signal, Mobatime serial code, MOBALine, IRIG-B and WTD.
The permanently lit colon during the time display signalizes the clock is synchronized by the
synchronization source.
3.1 Autonomous clock synchronized by DCF 77 receiver

Set value A in items P3 , P4 and P6 in the main MENU (chapter 7).

Connect the DCF 77 receiver to the LINES connector (IN+, IN- terminals)
using a twin-wire cable.

The maximum wire length depends on its diameter (app.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 1 pulse left out at
the 59th second.

In case the polarity is incorrect, the LED does not flash. In such a case,
interchange the two wires.

Install the receiver at a place with high-level radio signal. Don’t install the
receiver near sources of interfering signals, such as the 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.
3.2 Autonomous clock synchronized by GPS4500 receiver

Set value A in items P3 , P4 and the desired time-zone in the P6 item in the
main MENU (chapter 7).

Using jumper JP17 set the power supply output (DC OUT) on pins 3, 4 of the
JP1 connector.

Connect GPS receiver to the LINES connector (IN+, IN- terminals for the
signal and P3+, P4- terminals for antenna powering) using a four-wire cable.
Please note the correct polarity of the wires – see the GPS user manual.

For the correct placing of the receiver please follow the GPS user manual.

Presuming the good position of the GPS receiver the synchronization takes
place in approx.10 to 20 minutes.
3.3 Autonomous clock synchronized by internal GPS receiver

Set value A in item P3 , value 13 in item P4 and the desired time-zone in the
P6 item in the main MENU (chapter 7).

Connect the GPS antenna cable to dedicated SMA connector.

Place the GPS antenna according to following recommendation