Table of Contents
1 Imprint 1
2 Important Safety Information 2
2.1 Important Safety Instructions and Protective Measures ......................... 2
2.2 Used Symbols ................................................. 3
2.3 Security during Installation ......................................... 5
2.4 Safety during Operation ........................................... 7
2.5 Safety during Maintenance ......................................... 8
2.6 Handling Batteries .............................................. 8
2.7 Cleaning and Care .............................................. 9
2.8 Prevention of ESD Damage ......................................... 9
2.9 Return of Electrical and Electronic Equipment .............................. 10
3 GPS/GLONASS/Galileo/BeiDou satellite controlled clock 11
4 Blockdiagram GNS181PEX 12
5 Master oscillator 13
6 GNS181PEX Features 14
6.1 Time zone and daylight saving ....................................... 14
6.2 Asynchronous serial ports .......................................... 14
6.3 Time capture inputs ............................................. 15
6.4 Pulse and frequency outputs ........................................ 16
6.5 DCF77 Emulation .............................................. 17
7 Connectors and LEDs in the rear slot cover 18
7.1 Configuring the 9 pin connector ...................................... 19
7.2 SUB-D Pin Assignments of Multiref Port ................................. 20
8 Powering up the system 21
8.1 40dB Multi GNSS Timing Antenna with Integrated Lightning Protection .............. 22
8.2 GNSS Antenna for Stationary Installation ................................ 23
9 Firmware updates 24
10 Technical Specifications GNS181 25
11 Technical appendix GNS181PEX 27
11.1 Abstract of Time Code ............................................ 27
11.1.1 Description of IRIG-Codes ..................................... 27
11.1.2 Assignment of CF Segment in IEEE1344 Code ......................... 28
11.1.3 Generated Time Codes ....................................... 29
11.1.4 Selection of time code ....................................... 30
11.2 Time code Format .............................................. 31
11.2.1 IRIG Standard Format ....................................... 31
11.2.2 AFNOR Standard Format ..................................... 32
11.3 Time Strings .................................................. 33
11.3.1 Format of the Meinberg Standard Time String ......................... 33
11.3.2 Format of the SAT Time String .................................. 34
11.3.3 Format of the NMEA 0183 String (RMC) ............................ 35
11.3.4 Format of the Uni Erlangen String (NTP) ............................ 36
11.3.5 Format of the Computime Time String .............................. 38
11.3.6 Format of the SYSPLEX-1 Time String ............................. 39
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