Introduction to the SINAUT ST7 system
1.7 Radio clock components
Station control system
54
System Manual, 07/2009, C79000-G8976-C178-07
Short name
Order no.
Explanation
GPS kit
6NH9831-8AA
GPS complete package for simulating the DCF77 time signal,
consisting of GPS receiver, GPS outdoor antenna including
25 m cable, BNC adapter connector, configuration software,
PC adapter cable, and documentation.
GPS IND-BS
6NH9831-8LA
Lightning protector for GPS outdoor antenna.
1.7.4
Technical specifications of the radio clock components
Technical specifications of DCF77 antennas
DCF77 antennas
General
Power supply (over antenna cable)
1.7 to 5 V DC
Impedance
50 ohms
Power gain
20 dB
Max. cable length without amplification
250 m
Plastic housing
Light-resistant
Bandwidth
4 kHz
Indoor antennas
Humidity
95% no condensation
Degree of protection
IP50
Temperature range
•
Operation
•
Storage
•
0 °C t80 °C
•
-50 °C t85 °C
Outdoor antennas
Wind load
max. 180 km/h
Degree of protection
IP65
Temperature range
•
Operation
•
Storage
•
-30 °C t80 °C
•
-50 °C t85 °C
Humidity
100%
Lightning protection
Housing material
Die cast aluminum housing
Dimensions (W x H x D) in mm
250 x 105 x 95
Weight
Approx. 3.5 kg
Grounding point
•
Thickness of copper strand
•
length of copper strand
M6 threaded connection
•
min. 10 mm2
•
max. 10 m
Current pulse withstand 8/20 µs wave
10 kA
Response time
< 1 ns
