Satellite Internet

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. Both service providers and customers are encouraged to contribute. Register at the bottom of the forum home page if you wish to contribute or ask question. May 2018: GDPR: Updates to Privacy and Cookies policies: As you may know, a new EU data protection law called GDPR will apply from Friday 25th May 2018. As part of satsig's commitment to protecting the privacy of site visitors and forum members, I have therefore updated the Privacy and Cookie policies. There are now links leading to these policies: Disclaimer, Terms of Use and Privacy, Forum User Agreement, Forum Rules and Cookies at the bottom of the home page and all forum pages. Read the Forum rules.
      Satellite internet forum          
Pages: 1

Will this LNB work?

(Read 3737 times)
Ex Member
Ex Member


Jan 16th, 2008 at 7:42pm  
Quick question:

Can I swap a NJR2537S lnb for a NJR2184F lnb on a Linkstar application (W6)?

They seem to have the same stats 10.95-11.7Ghz, 10Ghz local.  Is there any advantage to using one over the other?  Thanks
Back to top
 
 
IP Logged
 
Eric Johnston
Senior Member
***
Offline


Personal text from Profile,
Options, Top line

Posts: 2108
Reply #1 - Jan 16th, 2008 at 8:59pm  
Read here http://www.njr.co.jp/e_frame/ef_05mc_02.html

The NJR2537 is an internal reference, phase lock loop PLL type.

The NJR2184 is a cheap DRO type.

The NJR2537 is a superior replacement, but if you are receiving a wide bandwidth QPSK outlink carrier, as is typical for a LinkStar system, you are unlikely to notice any difference.

The PLL type is needed when you are receiving a small carrier, such as SCPC, where the frequency error may mean you miss the carrier completely.  Also, small carriers and carriers with 8-PSK or 16-QAM modulation are more sensitive to phase noise and benefit from PLL type LNBs.  

Note that an external reference PLL LNB will not work unless the modem has a facility to send a 10 MHz reference up the LNB cable and has the reference turned on.

Best regards, Eric.
Back to top
 
 
IP Logged
 
Pages: 1