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GPS 02 » History » Revision 4

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laforge, 07/06/2020 12:15 PM


GPS 02 01

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

It is also called "NCD 901 41/1"

Connections

RJ45 for connection to DUL/DUG/DUW/SIU/TCU

The unit has two RJ45 sockets. They appear to have identical functionality.

The pin-out is as follows:

Pin Name Comment
1 1PPS- RS-422 1PPS GPS -> DUx
2 1PPS+ RS-422 1PPS GPS -> DUx
3 RxD RS-422 in direction DUx -> GPS
4 TxD+ RS-422 NMEA in direction GPS -> DUx
5 TxD- RS-422 NMEA in direction GPS -> DUx
6 RxD RS-422 in direction DUx -> GPS
7 12V supply voltage from DUx -> GPS
8 GND supply voltage from DUx -> GPS

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.

The 1PPS output signal of the GPS 02 only becomes active once there is a GPS fix.

SMA for connection to GPS antenna

This includes a 5V DC phantom voltage supply for the active antenna.

LED

There is a single green LED.
  • after power up, it takes some dozens of seconds until it first becomes active
  • slow green blinking light indicates powered up but no GPS fix
  • steady green light indicates powered up and GPS fix (1PPS output active)
Files (10)
gps02-nmea-log.txt gps02-nmea-log.txt 18.2 KB laforge, 07/07/2020 08:43 PM
gps02.jpg View gps02.jpg 258 KB laforge, 07/22/2022 07:45 AM
gps02_side.jpg View gps02_side.jpg 288 KB laforge, 07/22/2022 07:45 AM
gps03_internal_top.jpg View gps03_internal_top.jpg 1.47 MB laforge, 08/31/2022 06:25 PM
gps03_internal_bot.jpg View gps03_internal_bot.jpg 1.37 MB laforge, 08/31/2022 06:25 PM
Ericsson-GPS-Emulation.pdf View Ericsson-GPS-Emulation.pdf 3.52 MB laforge, 08/31/2022 06:35 PM
GRU0402_internal_top.jpg View GRU0402_internal_top.jpg 1.12 MB WiFiLuke, 11/21/2023 04:18 PM
GRU0402_internal_top_detail1.jpg View GRU0402_internal_top_detail1.jpg 2.66 MB WiFiLuke, 11/21/2023 04:19 PM
GRU0402_internal_top_detail2.jpg View GRU0402_internal_top_detail2.jpg 2.84 MB WiFiLuke, 11/21/2023 04:19 PM
GRU0402_internal_bottom.jpg View GRU0402_internal_bottom.jpg 863 KB WiFiLuke, 11/21/2023 04:19 PM

Updated by laforge over 3 years ago · 4 revisions

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