GPS 02 » History » Version 7
laforge, 07/07/2020 08:36 PM
| 1 | 6 | laforge | {{>toc}} |
|---|---|---|---|
| 2 | |||
| 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]] |
||
| 6 | 2 | laforge | |
| 7 | It is also called "NCD 901 41/1" |
||
| 8 | 3 | laforge | |
| 9 | h2. Connections |
||
| 10 | |||
| 11 | h3. RJ45 for connection to DUL/DUG/DUW/SIU/TCU |
||
| 12 | |||
| 13 | The unit has two RJ45 sockets. They appear to have identical functionality. |
||
| 14 | |||
| 15 | The pin-out is as follows: |
||
| 16 | |||
| 17 | |_.Pin|_.Name|_.Comment| |
||
| 18 | |1|1PPS-|RS-422 1PPS GPS -> DUx| |
||
| 19 | |2|1PPS+|RS-422 1PPS GPS -> DUx| |
||
| 20 | |3|RxD|RS-422 in direction DUx -> GPS| |
||
| 21 | |4|TxD+|RS-422 NMEA in direction GPS -> DUx| |
||
| 22 | |5|TxD-|RS-422 NMEA in direction GPS -> DUx| |
||
| 23 | |6|RxD|RS-422 in direction DUx -> GPS| |
||
| 24 | |7|12V|supply voltage from DUx -> GPS| |
||
| 25 | |8|GND|supply voltage from DUx -> GPS| |
||
| 26 | |||
| 27 | 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. |
||
| 28 | |||
| 29 | 4 | laforge | The 1PPS output signal of the GPS 02 only becomes active once there is a GPS fix. |
| 30 | 3 | laforge | |
| 31 | h3. SMA for connection to GPS antenna |
||
| 32 | |||
| 33 | This includes a 5V DC phantom voltage supply for the active antenna. |
||
| 34 | 4 | laforge | |
| 35 | h2. LED |
||
| 36 | |||
| 37 | There is a single green LED. |
||
| 38 | * after power up, it takes some dozens of seconds until it first becomes active |
||
| 39 | * slow green blinking light indicates powered up but no GPS fix |
||
| 40 | * steady green light indicates powered up and GPS fix (1PPS output active) |
||
| 41 | 5 | laforge | |
| 42 | h2. NMEA |
||
| 43 | |||
| 44 | 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 |
| 45 | |||
| 46 | 5 | laforge | <pre> |
| 47 | $PERC,GPppr,246398,01024,00050,00,3,0*4E |
||
| 48 | $PERC,GPsts,0,0,0,1111*7B |
||
| 49 | 7 | laforge | ... |
| 50 | 5 | laforge | $PERC,GPppr,246409,02113,00050,00,3,0*47 |
| 51 | $PERC,GPsts,1,0,0,1111*7A |
||
| 52 | 7 | laforge | ... |
| 53 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
| 54 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
||
| 55 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
||
| 56 | $GPGSV,2,1,08,09,86,062,51,06,47,234,47,04,46,072,47,07,41,179,43*7C |
||
| 57 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
||
| 58 | 7 | laforge | ... |
| 59 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
| 60 | 7 | laforge | ... |
| 61 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
| 62 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
||
| 63 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
||
| 64 | $GPGSV,2,1,08,09,86,062,51,06,47,234,47,04,46,072,47,07,41,179,43*7C |
||
| 65 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
||
| 66 | 7 | laforge | ... |
| 67 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
| 68 | </pre> |
||
| 69 | 6 | laforge | |
| 70 | h2. Further reading |
||
| 71 | |||
| 72 | http://uu.diva-portal.org/smash/get/diva2:573991/FULLTEXT01.pdf |
