GPS 02 » History » Revision 3
Revision 2 (laforge, 07/04/2020 01:54 PM) → Revision 3/15 (laforge, 07/06/2020 12:10 PM)
h1. 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"
h2. Connections
h3. 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.
h3. SMA for connection to GPS antenna
This includes a 5V DC phantom voltage supply for the active antenna.
