GPS 02 » History » Version 3
laforge, 07/06/2020 12:10 PM
| 1 | 2 | laforge | h1. GPS 02 01 |
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| 2 | 1 | laforge | |
| 3 | This is the Ericsson original GPS receiver that can be used to provide a clock reference to equipment like [[DUG 20]] or [[DUL 20]] or also the [[SIU 02]] |
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| 4 | 2 | laforge | |
| 5 | It is also called "NCD 901 41/1" |
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| 6 | 3 | laforge | |
| 7 | h2. Connections |
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| 8 | |||
| 9 | h3. RJ45 for connection to DUL/DUG/DUW/SIU/TCU |
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| 10 | |||
| 11 | The unit has two RJ45 sockets. They appear to have identical functionality. |
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| 12 | |||
| 13 | The pin-out is as follows: |
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| 14 | |||
| 15 | |_.Pin|_.Name|_.Comment| |
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| 16 | |1|1PPS-|RS-422 1PPS GPS -> DUx| |
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| 17 | |2|1PPS+|RS-422 1PPS GPS -> DUx| |
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| 18 | |3|RxD|RS-422 in direction DUx -> GPS| |
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| 19 | |4|TxD+|RS-422 NMEA in direction GPS -> DUx| |
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| 20 | |5|TxD-|RS-422 NMEA in direction GPS -> DUx| |
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| 21 | |6|RxD|RS-422 in direction DUx -> GPS| |
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| 22 | |7|12V|supply voltage from DUx -> GPS| |
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| 23 | |8|GND|supply voltage from DUx -> GPS| |
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| 24 | |||
| 25 | The supply voltage pins on a [[DUL 20]] only provide 3.1V until the GPS receiver is detected by means of a 1kOums resistor between 12V and GND. At that point, the DUL sources the full 12V. |
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| 26 | |||
| 27 | |||
| 28 | h3. SMA for connection to GPS antenna |
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| 29 | |||
| 30 | This includes a 5V DC phantom voltage supply for the active antenna. |
