M
ULTI
-S
OURCE
S
YSTEM BASED ON
S
YSTEM
7001RC
24 / 31
Multi-Source Function System 7001RC - V02.01
hopf
Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
2.7.3 Master/Slave-String - Channel 3
The hardware for this signal input is only available on the internal VG strip of the 7020RC
control board.
This signal input is internal to the system and must be made accessible to the customer
externally. The way to achieve this depends on the respective signal level and the
configuration of the system in which the Master/Slave-String is available.
This point should be considered when planning the system.
7020RC Board VG Strip Assignment
Vcc (5V DC)
a32, b32 ,c32
Gnd
Power Supply
a31, b31, c31
Rxd (TTL)
a15
Option Txd (TTL)
Synchronisation
Channel 3
a14
2.8 Synchronisation Process
2.8.1 Synchronisation via GPS (Channel 1)
With satellite reception (1 satellite in Fixed Position mode or at least 4 satellites in 3D mode;
see technical specification of the 7001RC system), the received date and
UTC
time
information is transferred to the system. The local time is calculated from the information
internal to the 7001RC system in respect of time difference and ST/WT changeover. The
local time and the UTC time are displayed and are available to the implemented boards on
the 7001RC bus. On continuous satellite reception the sync. source status changes from "
-
"
to "
R
". As soon as the sync. source status has reached "
R
" synchronisation of the system
begins. The system status synchronises from quartz operation "
C
" via radio synchronous "
r
"
to radio synchronous with quartz control "
R
".
Synchronisation via GPS:
•
The received time is UTC time
•
The system local time is a calculated time
In the event of satellite failure the system status changes from "
R
" "
r
" "
C
", after expiry
of the delay time set in the 7001RC system for the reset of the radio bit.
