GPS 02 » History » Version 9
laforge, 07/22/2022 07:46 AM
1 | 6 | laforge | {{>toc}} |
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3 | 2 | laforge | h1. GPS 02 01 |
4 | 1 | laforge | |
5 | 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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6 | 2 | laforge | |
7 | It is also called "NCD 901 41/1" |
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8 | 3 | laforge | |
9 | 8 | laforge | {{thumbnail(gps02.jpg)}} |
10 | {{thumbnail(gps02_side.jpg)}} |
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12 | 3 | laforge | h2. Connections |
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14 | h3. RJ45 for connection to DUL/DUG/DUW/SIU/TCU |
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15 | |||
16 | The unit has two RJ45 sockets. They appear to have identical functionality. |
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17 | |||
18 | The pin-out is as follows: |
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19 | |||
20 | |_.Pin|_.Name|_.Comment| |
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21 | |1|1PPS-|RS-422 1PPS GPS -> DUx| |
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22 | |2|1PPS+|RS-422 1PPS GPS -> DUx| |
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23 | |3|RxD|RS-422 in direction DUx -> GPS| |
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24 | |4|TxD+|RS-422 NMEA in direction GPS -> DUx| |
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25 | |5|TxD-|RS-422 NMEA in direction GPS -> DUx| |
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26 | |6|RxD|RS-422 in direction DUx -> GPS| |
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27 | |7|12V|supply voltage from DUx -> GPS| |
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28 | |8|GND|supply voltage from DUx -> GPS| |
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29 | |||
30 | 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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32 | 4 | laforge | The 1PPS output signal of the GPS 02 only becomes active once there is a GPS fix. |
33 | 3 | laforge | |
34 | h3. SMA for connection to GPS antenna |
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35 | |||
36 | This includes a 5V DC phantom voltage supply for the active antenna. |
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37 | 4 | laforge | |
38 | h2. LED |
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39 | |||
40 | There is a single green LED. |
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41 | * after power up, it takes some dozens of seconds until it first becomes active |
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42 | * slow green blinking light indicates powered up but no GPS fix |
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43 | * steady green light indicates powered up and GPS fix (1PPS output active) |
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44 | 5 | laforge | |
45 | h2. NMEA |
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46 | |||
47 | 7 | laforge | Ericsson uses some extensions to the typical standard NMEA sentences. For more information, see "This scientific thesis about emulating an Ericsson GPS receiver twoards a RBS":http://uu.diva-portal.org/smash/get/diva2:573991/FULLTEXT01.pdf |
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49 | 5 | laforge | <pre> |
50 | $PERC,GPppr,246398,01024,00050,00,3,0*4E |
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51 | $PERC,GPsts,0,0,0,1111*7B |
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52 | 7 | laforge | ... |
53 | 5 | laforge | $PERC,GPppr,246409,02113,00050,00,3,0*47 |
54 | $PERC,GPsts,1,0,0,1111*7A |
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55 | 7 | laforge | ... |
56 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
57 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
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58 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
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59 | $GPGSV,2,1,08,09,86,062,51,06,47,234,47,04,46,072,47,07,41,179,43*7C |
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60 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
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61 | 7 | laforge | ... |
62 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
63 | 7 | laforge | ... |
64 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
65 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
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66 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
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67 | $GPGSV,2,1,08,09,86,062,51,06,47,234,47,04,46,072,47,07,41,179,43*7C |
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68 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
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69 | 7 | laforge | ... |
70 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
71 | </pre> |
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72 | 6 | laforge | |
73 | h2. Further reading |
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74 | |||
75 | http://uu.diva-portal.org/smash/get/diva2:573991/FULLTEXT01.pdf |