GPS 02 » History » Version 14
tnt, 01/22/2023 04:16 PM
Add comment about minimal load on GPS port on DUL/DUG
1 | 6 | laforge | {{>toc}} |
---|---|---|---|
2 | |||
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]] |
||
6 | |||
7 | 11 | laforge | The GPS 02 is also called _NCD 901 41/1_, while the GPS 03 is also called _NCD 901 56/1_ |
8 | |||
9 | We're not aware of the exact differences between GPS 02 and GPS 03 |
||
10 | 3 | laforge | |
11 | 8 | laforge | {{thumbnail(gps02.jpg)}} |
12 | {{thumbnail(gps02_side.jpg)}} |
||
13 | |||
14 | 3 | laforge | h2. Connections |
15 | |||
16 | h3. RJ45 for connection to DUL/DUG/DUW/SIU/TCU |
||
17 | |||
18 | The unit has two RJ45 sockets. They appear to have identical functionality. |
||
19 | |||
20 | The pin-out is as follows: |
||
21 | |||
22 | |_.Pin|_.Name|_.Comment| |
||
23 | 10 | tnt | |1|1PPS+|RS-422 1PPS GPS -> DUx| |
24 | |2|1PPS-|RS-422 1PPS GPS -> DUx| |
||
25 | |3|RxD+|RS-422 in direction DUx -> GPS| |
||
26 | 3 | laforge | |4|TxD+|RS-422 NMEA in direction GPS -> DUx| |
27 | |5|TxD-|RS-422 NMEA in direction GPS -> DUx| |
||
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| |
||
31 | |||
32 | 14 | tnt | The supply voltage pins on a [[DUL 20]]/[[DUG 20]] only provide 3V-4V until the GPS receiver is detected by means of a 1kOhms resistor between 12V and GND. At that point, the DUL sources the full 12V. |
33 | But it will want to see at least a 10 mA load to continue providing the 12V ! |
||
34 | 3 | laforge | |
35 | 4 | laforge | The 1PPS output signal of the GPS 02 only becomes active once there is a GPS fix. |
36 | 3 | laforge | |
37 | h3. SMA for connection to GPS antenna |
||
38 | |||
39 | This includes a 5V DC phantom voltage supply for the active antenna. |
||
40 | 4 | laforge | |
41 | h2. LED |
||
42 | |||
43 | There is a single green LED. |
||
44 | * after power up, it takes some dozens of seconds until it first becomes active |
||
45 | * slow green blinking light indicates powered up but no GPS fix |
||
46 | * steady green light indicates powered up and GPS fix (1PPS output active) |
||
47 | 5 | laforge | |
48 | h2. NMEA |
||
49 | |||
50 | 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 |
51 | |||
52 | 12 | laforge | h3. GPS 02 |
53 | |||
54 | 5 | laforge | <pre> |
55 | $PERC,GPppr,246398,01024,00050,00,3,0*4E |
||
56 | $PERC,GPsts,0,0,0,1111*7B |
||
57 | 7 | laforge | ... |
58 | 5 | laforge | $PERC,GPppr,246409,02113,00050,00,3,0*47 |
59 | $PERC,GPsts,1,0,0,1111*7A |
||
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 | 7 | laforge | ... |
69 | 5 | laforge | $GPGGA,202700.000,5225.382806,N,01327.169546,E,1,6,1.36,31.725,M,44.745,M,,*64 |
70 | $GPGSA,A,3,09,06,04,07,02,16,,,,,,,2.59,1.36,2.20*01 |
||
71 | $PERC,GPppr,246435,02113,00050,06,0,0*4D |
||
72 | $GPGSV,2,1,08,09,86,062,51,06,47,234,47,04,46,072,47,07,41,179,43*7C |
||
73 | $GPGSV,2,2,08,02,39,290,44,16,18,073,42,26,,,35,30,,,35*79 |
||
74 | 7 | laforge | ... |
75 | 5 | laforge | $PERC,GPver,GPS 02 01,NCD 901 41/1,R1D,110624*54 |
76 | 12 | laforge | </pre> |
77 | |||
78 | h3. GPS 03 |
||
79 | |||
80 | looks mostly the same, just with a longer sequence of '1' in @$PERC,GPsts@ and with Glonass satellites in addition to GPS? |
||
81 | |||
82 | <pre> |
||
83 | $PERC,GPppr,000465,02048,00050,00,3,0*42 |
||
84 | $PERC,GPsts,0,0,0,111111*7B |
||
85 | ... |
||
86 | $PERC,GPver,GPS 03 01,NCD 901 56/1,R1B,TU8KBU9552.1544*11 |
||
87 | $PERC,GPreh,00:00:00 00/00/0000,Other*24 |
||
88 | $PERC,GPppr,000485,02048,00050,00,3,0*4C |
||
89 | $PERC,GPsts,0,0,0,111111*7B |
||
90 | ... |
||
91 | $GPGGA,182300.00,5225.38450,N,01327.16970,E,1,16,0.65,37.6,M,44.7,M,,*61 |
||
92 | $PERC,GPppr,325399,02225,00050,16,0,0*4F |
||
93 | $PERC,GPsts,1,0,0,111111*7A |
||
94 | $GNGSA,A,3,30,13,05,14,07,20,15,08,18,,,,0.95,0.65,0.70*15 |
||
95 | $GPGSA,A,3,30,13,05,14,07,20,15,08,18,,,,0.95,0.65,0.70*0B |
||
96 | $GNGSA,A,3,75,76,82,72,65,66,74,,,,,,0.95,0.65,0.70*18 |
||
97 | $GLGSA,A,3,75,76,82,72,65,66,74,,,,,,0.95,0.65,0.70*1A |
||
98 | $GPGSV,3,1,10,30,62,073,48,13,64,292,50,05,50,241,48,14,53,138,48*77 |
||
99 | $GPGSV,3,2,10,07,29,070,45,20,27,200,45,15,31,297,39,08,15,044,38*70 |
||
100 | $GPGSV,3,3,10,18,13,309,28,27,04,010,24,,,,,,,,*75 |
||
101 | $GLGSV,2,1,08,75,85,141,47,76,29,214,44,82,11,329,29,72,24,143,26*63 |
||
102 | $GLGSV,2,2,08,65,76,164,41,66,40,317,45,74,32,042,43,83,13,012,00*60 |
||
103 | 5 | laforge | </pre> |
104 | 6 | laforge | |
105 | 13 | laforge | h2. Circuit board pictures |
106 | |||
107 | h3. GPS 03 |
||
108 | |||
109 | {{thumbnail(gps03_internal_top.jpg)}} |
||
110 | {{thumbnail(gps03_internal_bot.jpg)}} |
||
111 | |||
112 | |||
113 | 6 | laforge | h2. Further reading |
114 | |||
115 | http://uu.diva-portal.org/smash/get/diva2:573991/FULLTEXT01.pdf |