Document: 1784en02.doc
QWTIME III MASTER CLOCK
Author: PM
Date: 2008-11-07
User Manual
Page: 9 of 61
WESTERSTRAND URFABRIK AB
P.O. Box 133
Tel. +46 506 48000
Internet:: http://www.westerstrand.se
SE-545 23 TÖREBODA
Fax. +46 506 48051
E-mail:
Synchronisation input
General
The Master Clock is equipped with a synchronisation input intended for connection to an external
synchronisation source. The sync. source can be either a radio receiver type GPS, RDS, MSF, DCF77 or another
Master Clock that transmits synchronisation pulses. The Master Clock is factory prepared for connection to a
radio receiver. Detailed connection diagram for different radio receivers can be found in the separate manual
delivered together with respectively receiver. If the Master Clock is going to be synchronised from another
Master Clock it has to be reconfigured. See below.
Synchronisation from another Master Clock
1. Turn off power.
2. Open the Master Clock by loosening the four screws holding the front panel. Lift the panel and set the
jumpers B4-B6 according to the instruction below.
3. Remount the front panel and turn on the power again.
4. Set the sync. source parameter by using the special function
SETUP/SYNC.SOURCE
.
5. Connect the sync. pulses to screw terminal 25 and 26.
6. Set the master clock to correct time +/- 30 sec.
7. When the synchronisation pulses have been accepted by the master clock the colon (:) between hours and
minutes in the display starts to flash.
X = Closed
FACTORY DEFAULT
B6
X
B4
X
B5
X
PREPARED FOR SYNC. PULSE FROM ANOTHER MASTER CLOCK
PREPARED FOR RADIO RECEIVER
