S
YSTEM
6844(RC)
S
YNCHRONIZATION
System 6844(RC) - V03.00
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Elektronik GmbH
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2
System 6844(RC) Synchronization
This Chapter describes the various options for synchronizing System 6844(RC).
GPS System 6844(RS) is also referred to as "Master-System". This System variant provides
an internal GPS receiver.
Sub-Master (Slave) Systems are Systems 6844 (RC) that are synchronized by other Sys-
tems such as a Master System 6844 (RC). Depending on the synchronisation mode an addi-
tional hardware is required to connect the synchronisation signal to System 6844 (RC).
2.1
Summary / Synchronization Source Settings
System synchronization options and their required settings:
Master
Sub-Master (Slave)
Sync.Channel
Menu
GPS
Antenna Signal
Serial
Data string
Serial
Data
PPS
DCF77 pulse
CET / worldwide
1.01 TIME
o
o
o
o
o
1.02 TIME OFFSET
+
-
-
-
+
1.03
CHANGEOVER TIME S
D
(Standard time
Daylight
saving time)
+
-
-
-
-
1.04
CHANGEOVER TIME D
S
(Daylight saving time
Standard time)
+
-
-
-
-
1.31
SYSTEM-Byte /
Synchronizations-Mode
(Bit2 - Bit0)
000
001
010
011 / 100
+ Always required
(+) Only when necessary
o Not required - but possible
-
Input not possible or no function
2.1.1 Synchronisation via GPS
GPS Clock Systems are synchronized by the time signal transmitted via the GPS satellites.
Therefore the Master System 6844 (RC) provides an internal GPS receiver. For the recep-
tion of the GPS signal the installation of an appropriate GPS Antenna System is necessary.
Details about GPS functionality is described in
Chapter 12.2 GPS (Global Positioning Sys-
The time basis received from GPS is based on UTC and does not contain any local time in-
formation such as difference time and changeover times. These parameters need to be con-
figured for evaluation of the local time in the System.
2.1.2 Synchronization via Serial Interface
On this setting, the
hopf
_
Master/Slave string is transmitted to the clock via the COM1 serial
interface. This setting blocks the interface for other types of data communication (e.g. cycli-
cal time telegram output).
