Siemens SIMEAS Q80 Operating Instruction page 150

E-74 SIMEAS Q80 7KG8080
14.2 Synchronization and time base
Parameter
balanced (default)
Drift
Ageing
Parameter
Supported format
Precision
Jitter (max.)
Voltage level
Input resistance
Input connector
Shield potential input
*using BCD information only
Max. cable length
Max. number of devices
Common mode
Voltage level
DCF input/output
Shield potential, IRIG-input
For description see here
Power Quality Recorder SIMEAS Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 09.02.2011
value typical
time base per device without external synchronization
± 20 ppm
time base per device without external synchronization
GPS
TTL 5 V TTL Pegel
1 kW (pull up) 20 kW (pull up)
DSUB-9
Synchronization with DCF77 for several devices (Master/Slave)
0 V
5 V
connector "SYNC"
system ground
40
min. / max. Remarks
at 25°C (accuracy of internal time base)
± 10 ppm
-40 °C bis +85 °C operating temp.
±50 ppm
at 25°C, 10 years
± 10 ppm
DCF77 IRIG-B
B002
B000, B001, B003*
±1 µs
±8 µs
5 V TTL Pegel
BNC connector "SYNC"
short circuit proof, not isolated
system ground
200 m BNC cable RG58
20 slaves only
theses device must have the same ground
voltage level, otherwise signal quality
problems (signal edges) may result.
BNC
NTP
version 4 (downwards
compatible)
<5 ms after ca. 12 h
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Ethernet
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