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4.3.6.4 Bit 4: Error Message or PPS to 9-pole SUB-D Connector X1, Switch Box
Control
Selection can be made between the PPS output and the error message on the 9 pole SUB-D
connector X1, pin 4 on the board front panel. In this way the error message is available to
external units. This output serves especially to control the hopf switch box (5000 system).
This system controls the switchover of two data sources on one output depending on the er-
ror status of two connected hopf 7001 systems with 7020 control board. In this way serial
data strings, digital pulses and analogue signals can be switched.
Bit 4
4.3.6.5 Bit 3: Master/Slave-String Time Base
Bit 3 sets whether UTC time or local time is transmitted in the received Master/Slave-String.
This setting is only effective when Bit 2 in the SYSTEM BYTE (see Chapter 4.3.6.6 Bit 2:
Master/Slave-String Evaluation) is set to the special evaluation of the Master/Slave-String.
Bit 3= 0 - The time base in the Master/Slave-String is local time (standard setting):
When the master/slave-string is programmed with local time Bit 3 is set to 0, so that the 7001
system interprets the time information in the master/slave-string as local time and calculates
the UTC time correctly by means of the internally set time differential and the switchover
times (provided that these are activated via Bits 5 and 6 of the synchronisation settings byte
(see Chapter 4.3.6.7 Bit 1 and Bit 0: Summertime-/ Wintertime Switchover Signalling
Bit).
The received time is local time, UTC is a calculated time.
Bit 3 = 1 - The time base in the Master/Slave-String is UTC:
When the Master/Slave-String contains the UTC time Bit 2 is set to 1. In this case the time in
the Master/Slave-String is interpreted as UTC time and the local time is calculated from this
time information having regard to the internally set time differential and the switchover times
(provided that these are activated via Bits 5 and 6 of the synchronisation settings byte
(see Chapter 4.3.6.7 Bit 1 and Bit 0: Summertime-/ Wintertime Switchover Signalling
Bit).
The received time is UTC time; local time is a calculated time.
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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: info@hopf.com
0
PPS pulse output to 9 pole SUB-D connector X1 pin 4
1
Error message output to 9 pole SUB-D connector X1 pin 4
If this bit is set incorrectly (e.g. UTC time is received but the 7001 system is
set to local time) then the 7001 system sets both the local time and the UTC
time incorrectly!
In the example given the UTC time would be interpreted as local time and
the UTC time would be calculated incorrectly as a result.
Output to 9 pole SUB-D connector X1
7001GPS Satellite Clock System - V08.00
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