Introduction to the SINAUT ST7 system
1.7 Radio clock components
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
55
DCF77 antennas
Protection level at 6 kV 1.5/50 µs wave at input < 12 V
Insertion loss for DCF77 signal Max. 3 dB
Input / output BNC female / BNC female
Input / output impedance 50 ohms
Degree of protection IP40
Temperature range
• Operation
• Storage
• -20 °C through +80 °C
• -40 °C through +85 °C
Humidity 95% no condensation
Technical specifications of the GPS receiver
GPS receiver
Interfaces:
• RS-232/RS-422
• Pulse outputs
• GPS input
• DCF77 simulation output
• 9-pin D-sub male connector
• Screw terminals
• BNC socket
• BNC socket
Connector for power supply Screw terminals
Power supply 18 to 60 V DC
Power consumption 6 VA
Construction
• Housing material
• Dimensions (W x H x D) in mm
• Weight
• Aluminum
• 65 x 105 x 130
• Approx. 700 g
Installation On 35 mm standard rail
Quartz accuracy ± 0.1 ppm after GPS control/synchronization and
at constant temperature
Emergency clock accuracy ± 25 ppm at 25 °C
Maintenance-free emergency clock backup 3 days
Type of receiver 8-channel phase tracking receiver
Evaluation L1 frequency 1575.42 MHz, C/A code
Sensitivity -143 dB
Synchronization time
• Cold restart (initial installation without
position information)
• Warm start (power down < 3 days)
• 30 min to 4 h
• Approx. 1 min.
Temperature range
• for specified data
• with poorer free-run (accuracy) characteristics
• 0 to 50 °C
• 0 to 70 °C
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