Technical specifications
6.6 Technical specifications of the radio clock components
SINAUT ST7 station control system
254
System Manual, 09/2016, C79000-G8976-C178-10
6.6
Technical specifications of the radio clock components
Technical specifications of DCF77 antennas
Table 6- 3
Technical specifications of DCF77 antennas
DCF77 antennas
Article numbers
6NH9831-0AA, 6NH9831-0BA, 6NH9831-0DA
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 to +80 °C
•
-50 °C to +85 °C
Outdoor antennas
Wind load
max. 180 km/h
Degree of protection
IP65
Temperature range
•
Operation
•
Storage
•
-30 °C to +80 °C
•
-50 °C to +85 °C
Humidity
100%
Table 6- 4
Technical specifications of indirect lightning protection
DCF77 antennas
Article numbers
6NH9831-2AA, 6NH9831-8LA
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
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