Best Practices for Microwave Radio Fault Rectification - Technopediasite

.

Friday, January 18, 2019

Best Practices for Microwave Radio Fault Rectification

Best Practices for Microwave Radio Fault Rectification: We all know that microwave transmission is the transmission of information by microwave radio waves. Microwave widely used for point to point communication. It is wireless transmission of information.I am writing about the microwave fault rectification so I would like to explain the properties of microwave link. Microwave link involve Line Of Sight (LOS) communication technology. 
LOS play a very important role in microwave radio communication. It also affected greatly by environmental constraints including rain fade. Microwave have very limited penetration capabilities through any obstacle like hill,buildings,trees. Microwave signal can be degraded during solar proton events. The calculated 99.9% availability rate means that the link may be down for a cumulative total of ten or more hours per year as the peaks of rain storms pass over the area. You can READ MORE" Factors Affecting the Behavior of Microwave
Best Practices for Microwave Radio  Fault Rectification
Microwave Radio Fault Rectification
Microwave fault Rectification during site visit

There are many factors affecting the behavior of microwave radio communication like reflection, refraction, scattering, diffraction, absorption, ducting, Earth curvature, fresnol zone, free space path loss (dispersion), fading etc. Matter is that how to fix the microwave radio fault if there is a problem due to any reason? Today I will explain how to rectify the fault of microwave antenna.

Before going to any site, Ensure you are equipped with

i. Microwave Tool Kit . ii. Electronic Spares. iii. General spare (connector, RF cables ,Fuses etc..), Laptop and Config Cables.iv. Confirm access to site. v. Safety Tools vi. Site NDD , AT results & FLER of sites in your area to be available in Laptop for Quick reference . vii. All labels/stickers (hard and soft copy) viii. Make sure the availability of Rigger. ix. Light source (Torch) is available in Toolkit.

For Antenna misallignment failure teams along with rigger to be made available at both ends of link. For fault in link which is invisible to NNOC two teams to mobilize for both ends of link.

Common practices to be followed  during Faults Resolution 
Login to IDU: 
Before logins to IDU inform NNOC . 
Note down all the performance related parameters of near and far end such as 
TX power, 
RSL value 
TX/RX Frequency(or Channel No.   
Urgent alarms observed. 

Replacement of ODU: 
Before Removing the ODU make sure for the Following conditions. 
Do not Remove the IF cable during  NE power on condition. 
Switch off the IDU . 
Remove the weather proofing on IF cable connector properly 
Remove the IF cable at ODU end . Cover the IF cable connector with insulation tape/IF cable connector cap if available to avoid damage to connector. 
Loosen the bolts of ODU with the help of proper size of L-  N keys, Do not use screw driver / Player  it will damage the bolt grip. 
While removing the ODU make sure the O-Ring is secured properly.Also seal the ODU wave guide opening with wave guide cap .
Ensure O-Ring is Re-Tight and weather proofing of IF cable connector  is done properly 
Replace the faulty ODU with the new ODU make sure it is tightened with L-N keys

Replacement of IDU : 
Login to IDU Note all the parameter as mentioned earlier. 
Switch off the IDU  by ON/OFF button as shown in previous slide. 
Remove the IF cable connector at IDU  end,D-type connector, earthing cable and power cable connector Molex type. 
Loosen  the screws and remove the IDU. 
Replace with new IDU  restore all the hardware connection removed during step-iii,switch On the IDU wait for warm-up time .login to the IDU put all the parameter of old IDU. 
Before leaving the site make sure the RSL value is restored  and  the traffics are restored to normal. 
Ensure Visibility of complete path to NNOC

Replacement of IF cable :
Apply for the PE  and complete the routing of IF cable in Day time to avoid the  damage of cable in night. 
If  possible and connector is available make the connector at ODU and IDU end in day time and check the cable shorting and measure the VSWR  reading of  IF cable. connector must be covered with cap or sealed with insulation tap to avoid damage. 
Before replacing IF cable switch off  the IDU 
Remove the weather proofing at ODU end . 
Replace the new cable . connect at IDU , Surge Arrestor  and ODU end . do proper weather proofing at ODU end . 
Remove the IF cable connector if it is in good condition and can be reused. 

Replacement of IF cable connector :
At IDU end : Switch off the IDU and then remove the connector and replace with the new connector . 
AT ODU end: switch off the IDU , remove the weather proofing and then replace the connector check the shorting of connector if any. 
Do the re-weather proofing . 
Do not apply excessive force while fixing connector.It may damage the threads of female connector / IDU /ODU 
Switch on the IDU and verify for all the parameters  before leaving the site. 

Reseting IDU/ NE 
Never give hard reset to the IDU or other element. 
Try to login into the IDU if possible, capture all the alarm and other performance parameters. 
Verify other  factors which may cause IDU  hang such as earthing ,Power Fluctuations/SMPS problem / due to other network interface. 
If  all other factors are found normal, then hard reset can be given to IDU . 
Note down details of alarm observed during faults. 
Try to capture Logs.
Forward detailed observation during fault condition NE Hang Tracking Sheet  to NHQ O&M to determine exact root cause.

Antenna Misallignment  
Ensure availability of  two teams at both ends of link to reduce MTTR.
At each station, adjust azimuth and elevation angle for the antenna direction alternately so that the voltage measuring value becomes maximum Check RSL as per FLER.
Marking  aligned positions of  Antenna and pole mount with visible & durable color. 
Pole mount inspections to be carried out  & corrections  must be done immediately if  abnormality/ design deviation found. 
During tightening  set appropriate value on  torque wrench  as per specification to check the tightness of  Pole mount and Antenna mount bolts. 
Check for availability of working platform and extension platform as per  design. 
Make sure that Pole mount used is of new design and as per REAL drawing and specifications. 

Summary
I have explain best solution of microwave radio fault rectification,If you follow all mentioned steps, then you can easily rectify the fault of microwave radio antenna.Microwave Antenna Fault sometimes makes much trouble So I have prepared these microwave radio fault rectification notes for you.I hope you will take advantage of this notes.If you like this notes "Best Practices for Microwave Radio Fault Rectification", please comment,subscribe my page and share it.

16 comments:

  1. Quickly this site will indisputably be famous among all blogging people, because of its fastidious articles or reviews.

    ReplyDelete
  2. For frequent microwave users or cooks who rely on the microwave to cook larger quantities of food on a regular basis, mid-sized microwaves (0.9-1.6 cf ) and full-sized microwaves (1.7-2.3 cf) are the better option. personal weighing machine India

    ReplyDelete
  3. I went over this website and I believe you have a lot of wonderful information, saved to my bookmarks best microwave

    ReplyDelete
  4. Took me time to read all the comments, but I really enjoyed the article. It proved to be Very helpful to me and I am sure to all the commenters here! It’s always nice when you can not only be informed, but also entertained! microwave convection combo

    ReplyDelete
  5. It is too big a merit in our busy city lives. convection microwave

    ReplyDelete
  6. I have express a few of the articles on your website now, and I really like your style of blogging. I added it to my favorite’s blog site list and will be checking back soon… Fault Location Services Dulles

    ReplyDelete
  7. This particular papers fabulous, and My spouse and i enjoy each of the perform that you have placed into this. I’m sure that you will be making a really useful place. I has been additionally pleased. Good perform! Fault Location Services Switch Back

    ReplyDelete
  8. It all is impressive to read the paper these types of interesting together with different article content for your web-sites. Fault Location Services Bowie

    ReplyDelete
  9. Hey what a brilliant post I have come across and believe me I have been searching out for this similar kind of post for past a week and hardly came across this. Thank you very much and will look for more postings from you. best spanner set online

    ReplyDelete
  10. Oven parts can be handily oven repair requested through the Web.

    ReplyDelete
  11. On the off chance that the monetary expenses of the appliance Oven door won't shut are beyond what you can bear.

    ReplyDelete
  12. You additionally get additional capacities that may not accompany a standard stove, such as seasoning and barbecuing choices, just as warming broilers incorporated into the primary stove. the right microwave

    ReplyDelete
  13. GeartoGo I would like to say that this blog really convinced me to do it! Thanks, very good post.

    ReplyDelete
  14. The writer has outdone himself this time. It is not at all enough; the website is also utmost perfect. I will never forget to visit your site again and again. microwave repair

    ReplyDelete
  15. This is significant on the grounds that we are ordinarily reluctant to enter our own data on lead catch pages.10100 empyrean way

    ReplyDelete
  16. How would you call and keep an eye on your children to ensure they are protected? How would they call you when they need you? Having a few light weight, reduced two-way radios isn't a poorly conceived notion. Indeed, on occasions such as this current, it's a need to protect the wellbeing of your family.
    https://twitchviral.com/

    ReplyDelete