No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


RSL problem and link Alarm in a XPIC(1+0) MW Link due to RF jumper cable faulty

Publication Date:  2014-04-19 Views:  729 Downloads:  0
Issue Description
X operator want to upgrade link from 1+0 to XPIC 1+0 using dual polarization antenna for live network.

Step of work:
1 Connect another ODU Horizontal port at antenna.
2. Connect IF connector to IFX2 card and Connection XPIC cable.
3. Power on IFX2 Card
4. Configure IFX2 card and ODU according to planning data
5. Configure XPIC 

After completing the above steps we check and see the link alarm in  Horizontal IFX2 card  and ODU. Vertical Polarization ODU RSL -38 dBm  was in live network before working  but  Horizontal ODU RSL -90 dBm .This is  a live link. so alignment has no problem .It should be configuration or hardware or installation  problem  in Horizontal part.

Alarm Information

Alarm shows:

1. MW_LOF alarm in software
2.XPIC LOS alarm in Software
3.Link alarm in IFX2 board LED
Handling Process

Finally we found that RF jumper cable is faulty.Then we change the RF Jumper cable by new one and this link is ok
Root Cause
First we checked configuration level this is correct and  vertical is ok .so we check installation and Hardware

1.Check ODU
We inter change  vertical and Horizontal ODU ,Still Horizontal have link alarm and RSL problem.  so ODU have no problem.
2.Check IFX2 card
We inter change  vertical and horizontal IFX2 card ,still horizontal have link alarm and RSL problem. so IFX2 card have no problem
3.Check RF Jumper cable
We inter change  vertical and horizontal RF Jumper cable ,so  horizontal have no  link alarm  and RSL -38 dBm which is ok but now Vertical have link alarm and RSL shows -90 dBm that means RF jumper cable is faulty.

So my suggestion that when anybody installs RF jumper cable in a MW transmission. He should be more careful and attentive without broken or more bending or more tighten by using cable tie.