GPS 02 » History » Version 13
laforge, 08/31/2022 06:25 PM
1 | 6 | laforge | {{>toc}} |
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3 | 11 | laforge | h1. GPS 02 01 / GPS 03 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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7 | 11 | laforge | The GPS 02 is also called _NCD 901 41/1_, while the GPS 03 is also called _NCD 901 56/1_ |
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9 | We're not aware of the exact differences between GPS 02 and GPS 03 |
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10 | 3 | laforge | |
11 | 8 | laforge | {{thumbnail(gps02.jpg)}} |
12 | {{thumbnail(gps02_side.jpg)}} |
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14 | 3 | laforge | h2. Connections |
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16 | h3. RJ45 for connection to DUL/DUG/DUW/SIU/TCU |
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18 | The unit has two RJ45 sockets. They appear to have identical functionality. |
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19 | |||
20 | The pin-out is as follows: |
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21 | |||
22 | |_.Pin|_.Name|_.Comment| |
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23 | 10 | tnt | |1|1PPS+|RS-422 1PPS GPS -> DUx| |
24 | |2|1PPS-|RS-422 1PPS GPS -> DUx| |
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25 | |3|RxD+|RS-422 in direction DUx -> GPS| |
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26 | 3 | laforge | |4|TxD+|RS-422 NMEA in direction GPS -> DUx| |
27 | |5|TxD-|RS-422 NMEA in direction GPS -> DUx| |
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28 | 10 | tnt | |6|RxD-|RS-422 in direction DUx -> GPS| |
29 | 3 | laforge | |7|12V|supply voltage from DUx -> GPS| |
30 | |8|GND|supply voltage from DUx -> GPS| |
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32 | 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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34 | 4 | laforge | The 1PPS output signal of the GPS 02 only becomes active once there is a GPS fix. |
35 | 3 | laforge | |
36 | h3. SMA for connection to GPS antenna |
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38 | This includes a 5V DC phantom voltage supply for the active antenna. |
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39 | 4 | laforge | |
40 | h2. LED |
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41 | |||
42 | There is a single green LED. |
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43 | * after power up, it takes some dozens of seconds until it first becomes active |
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44 | * slow green blinking light indicates powered up but no GPS fix |
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45 | * steady green light indicates powered up and GPS fix (1PPS output active) |
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46 | 5 | laforge | |
47 | h2. NMEA |
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48 | |||
49 | 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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51 | 12 | laforge | h3. GPS 02 |
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53 | 5 | laforge | <pre> |
54 | $PERC,GPppr,246398,01024,00050,00,3,0*4E |
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55 | $PERC,GPsts,0,0,0,1111*7B |
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56 | 7 | laforge | ... |
57 | 5 | laforge | $PERC,GPppr,246409,02113,00050,00,3,0*47 |
58 | $PERC,GPsts,1,0,0,1111*7A |
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59 | 7 | laforge | ... |
60 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
61 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
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62 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
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63 | $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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64 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
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65 | 7 | laforge | ... |
66 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
67 | 7 | laforge | ... |
68 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
69 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
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70 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
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71 | $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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72 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
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73 | 7 | laforge | ... |
74 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
75 | 12 | laforge | </pre> |
76 | |||
77 | h3. GPS 03 |
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78 | |||
79 | looks mostly the same, just with a longer sequence of '1' in @$PERC,GPsts@ and with Glonass satellites in addition to GPS? |
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80 | |||
81 | <pre> |
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82 | $PERC,GPppr,000465,02048,00050,00,3,0*42 |
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83 | $PERC,GPsts,0,0,0,111111*7B |
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84 | ... |
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85 | $PERC,GPver,GPS 03 01,NCD 901 56/1,R1B,TU8KBU9552.1544*11 |
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86 | $PERC,GPreh,00:00:00 00/00/0000,Other*24 |
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87 | $PERC,GPppr,000485,02048,00050,00,3,0*4C |
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88 | $PERC,GPsts,0,0,0,111111*7B |
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89 | ... |
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90 | $GPGGA,182300.00,5225.38450,N,01327.16970,E,1,16,0.65,37.6,M,44.7,M,,*61 |
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91 | $PERC,GPppr,325399,02225,00050,16,0,0*4F |
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92 | $PERC,GPsts,1,0,0,111111*7A |
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93 | $GNGSA,A,3,30,13,05,14,07,20,15,08,18,,,,0.95,0.65,0.70*15 |
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94 | $GPGSA,A,3,30,13,05,14,07,20,15,08,18,,,,0.95,0.65,0.70*0B |
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95 | $GNGSA,A,3,75,76,82,72,65,66,74,,,,,,0.95,0.65,0.70*18 |
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96 | $GLGSA,A,3,75,76,82,72,65,66,74,,,,,,0.95,0.65,0.70*1A |
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97 | $GPGSV,3,1,10,30,62,073,48,13,64,292,50,05,50,241,48,14,53,138,48*77 |
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98 | $GPGSV,3,2,10,07,29,070,45,20,27,200,45,15,31,297,39,08,15,044,38*70 |
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99 | $GPGSV,3,3,10,18,13,309,28,27,04,010,24,,,,,,,,*75 |
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100 | $GLGSV,2,1,08,75,85,141,47,76,29,214,44,82,11,329,29,72,24,143,26*63 |
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101 | $GLGSV,2,2,08,65,76,164,41,66,40,317,45,74,32,042,43,83,13,012,00*60 |
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102 | 5 | laforge | </pre> |
103 | 6 | laforge | |
104 | 13 | laforge | h2. Circuit board pictures |
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106 | h3. GPS 03 |
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107 | |||
108 | {{thumbnail(gps03_internal_top.jpg)}} |
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109 | {{thumbnail(gps03_internal_bot.jpg)}} |
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112 | 6 | laforge | h2. Further reading |
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114 | http://uu.diva-portal.org/smash/get/diva2:573991/FULLTEXT01.pdf |