Satsig logo
Satellite Broadband Forum.
Welcome, Guest. Please Login
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.  Both service providers and customers are encouraged to contribute. Read the Forum rules.  Click Register at the bottom if you want to join.
  HomeHelpSearchLogin  
 
Page Index Toggle Pages: 1
TX BAD I NEED HELP (Read 1218 times)
Malachy
Senior Member
***
Offline



Posts: 62
Gender: male
TX BAD I NEED HELP
Oct 13th, 2010 at 7:35am
 
I am pointing at NSS12 with an SNR of 13.2 and on activation, my TX deteriorates immediately to a high -8.  What can be my problem? I am then switched off because of that.  I have used a shorter cable, changed my pol but get the same results

I need assistance

Malachy
Back to top
 
YIM  
IP Logged
 
Eric Johnston
Senior Member
***
Offline


Personal text from Profile,
Options, Top line

Posts: 2113
Re: TX BAD I NEED HELP
Reply #1 - Oct 13th, 2010 at 9:03am
 
I don't understand.

If you mean that your RX deteriorates to 8 when your transmit is activated then:
Could be missing transmit reject filter in front of the LNB.
Could be bad contact of braid sheath in any of the 4 coax cable connectors. (e.g. BUC DC power coming back via LNB cable sheath).
Could be overdrive of the BUC.  Reduce modem transmit power by 20 dB. Does that eliminate the RX reduction ?
Could be your tuning is wrong and you are putting two carriers up on the same frequency? Applies if you can see both your own and the hub signals and you have put the wrong tuning figures in the modem config.

If you mean that your TX is reported as "high -8"* by the hub when you transmit then:
Could be BUC power supply too low. Check DC via BUC cable connectors.
Could be overdrive of the BUC. Does reducing modem transmit power improve the receive signal quality at the hub ? If you have shortened the TX cable you could be making overdrive matters worse.

*  What does high minus 8 mean ?

Best regards, Eric.
Back to top
 
WWW  
IP Logged
 
Page Index Toggle Pages: 1
 
Anytime you want to order from Amazon...
If in Americas, please use the link below:

Useful links:
My latitude longitude (lat/long) finder
Email me: eric@satsig.net
Anytime you want to order from Amazon...
If in Europe, please use the link below: