?Equipment: RTN 950 equipment
?NE: DMR429 - DMR021
?Configuration: XPIC 1+0 38G
?Description: after the implementation for the MW link we tried to make the alignment but we didn't get any RSL.
We decided to dismantle the ODU and the antenna from one site and test it,
1.Connect 2 ODU with the ODU adapter with waveguide directly using RF attenuator:
In this situation we get RSL -87 dbm with maximum TX power
2.Try to change the ODU but we get the same RSL
3.Try to change the way of installation between ODU and Adapter:
Note: the ODU and the ODU adapter is the same interface (circle interface) therefore however you connect it we thought will be the same in general we change the polarization by waveguide not by ODU.
4.First we install the ODU on the adapter "V" on the left; we get RSL -87 dbm with maximum power
5.After that we tried to install the ODU on the adapter “V” on the upwards; we get RSL -28 dbm with maximum power.
1.Check the configuration (TX frequency, TX power, Modulation, frequency channel bandwidth ….)
2.Check all the cable connections
3.Check all Waveguide (frequency and fixing to the ODU adapter and Antenna)
4.Check the antenna frequency and the ODU frequency channel (should be the same)
5.Try to reset the ODU and the RTN
6.Make alignment again with Vertical polarization alone with horizontal polarization off and vice versa
7.Check the ODU received IF signal power level by use following command with Navigator:
17 is hexadecimal value of ODU number,like here 17 means 23# ODU
Optp cmd : 4f15
And then there will feedback a value from Navigator like dd above. This value is IF signal power level
#1-108:szhw [East Dummer _ DMR163
Optp cmd : 4f15
That mean the IF signal power level is OK
After all these action we still have no RSL at the 2 ends
Installing the ODU to the ODU Adaptor: The "V" should be keep upwards or downwards otherwise the ODU will not work,
For both polarization and the polarization should be controlled by waveguide interface on the antenna.