Home page of Satellite Internet and Information

Satellite Internet Forum.

Welcome, Guest.
Welcome to this satellite broadband discussion forum. Wherever you are and whatever your problem we are here to help each other. Connecting to the internet via satellite is not always easy but is critically important to those in remote places or with poor terrestrial infrastructure. Service providers and customers are encouraged to contribute. Register at the bottom of the forum home page if you wish to contribute or ask a question. VSAT service providers and satellite equipment sellers may feature their products free of charge; just register and get posting. Paid-for adverts, top left and top right, on all forum pages, are also available. Read the Forum rules.
      Home            Login            Register          
Pages: 1

iDirect 3000

(Read 1439 times)
Ex Member
Ex Member


Feb 24th, 2011 at 12:43pm  
Pls hw do i improve my Rx SNR.My provider said i need to improve on it.I have check my cable and my modem everything is ok,but still having same problem and my provider keeps telling to try and improve my RxSNR strenght?pls help me out with possible solution
Back to top
 
 
IP Logged
 
Eric Johnston
Senior Member
★★★
Offline



Posts: 2109
Reply #1 - Feb 24th, 2011 at 1:20pm  
You have checked the cable and modem.

Check for dish distortion.

The front rim of the dish must be flat. Do the crossed fishing line test and adjust the dish shape till it is flat to 1mm.
ref: https://www.satsig.net/pointing/rear-side-struts.htm

Check the dish pointing and polarisation alignment.

In elevation record the quality.  Mark a flat on the nut with felt tip pen.  Increase the elevation by 1/6th of a turn of the nut.   Record the quality. Repeat say 18 times till you have made three turns of the nut and passed through the beam peak.  Carefully wind back to the exact beam centre.

Repeat the process in azimuth. You will need to go back to a start position and approach the peak from the same side direction to avoid backlash. Stop as you reach the peak.

Set the polarisation by calculation and measurement using an inclinometer sideways across the BUC or LNB.  Maybe add +3 deg if using a Eutelsat satellite. Your hub will be able to guide you verbally while watching a CW carrier from you in x-pol at the hub.

Best regards, Eric.
Back to top
« Last Edit: Feb 24th, 2011 at 3:57pm by Admin1 »  
 
IP Logged
 
Pages: 1