lnb dB levels. Whats the difference? - Techwatch Support Forums: Digital & Satellite TV, FTA, Cable, Computers, Mobile Phones, Apple and General Tech Forums

nanochickin · 21-08-06, 10:57 PM

I recently acquired 4 single lnb's and 1 dual dish network lnb for my ongoing satellite project.

I have noticed that my 2 Amstar lnbs are 0.3dB, my Chess Platinum 2 is 0.2dB and my Starsat lnb is 0.5dB.

I have no idea what the dish network lnb is or even if it will work with any of the european sats as the US Dish Network appears to use l/h & r/h circular polarisation rather than the usual h/v polarisation, so i'm guessing that i may have to change it or be stuck with the same problem i have with my BSB squarial.

Whats the difference regarding dB figures? :?

I am intending to set my 80cm dish up for 19.2e and 13e, leave my sky minidish at 28.2e and hopefully set my newley acquired dish network 500 20" dish at 5w and 1w if it works.

Which lnbs would be best suited for each satellite location?

Help with these questions would be most appreciated. Thanks

nano.

Mickha · 21-08-06, 11:56 PM

The lower the db level the better the LNB, in theory, but some of the readings are spurious, and can't be believed.

Jimdefruit · 22-08-06, 10:51 AM

nanochickin,
It would be interesting to see the signal levels and quality you get with each of the lnbs.

Mickha is right, past comparisons have shown .3 nbs of one make to be no better than other makes who quote .6.

The most important thing is to go for the better makes such as MTI Blueline or Invacom, but then you already have yours. Lets hope you get good results

21-08-06, 10:57 PM	#1 (permalink)
nanochickin Retired Mod & Sat Guru Join Date: Aug 2006 Location: Wolverhampton Posts: 3,825 Thanks: 46 Thanked 338 Times in 270 Posts	lnb dB levels. Whats the difference? I recently acquired 4 single lnb's and 1 dual dish network lnb for my ongoing satellite project. I have noticed that my 2 Amstar lnbs are 0.3dB, my Chess Platinum 2 is 0.2dB and my Starsat lnb is 0.5dB. I have no idea what the dish network lnb is or even if it will work with any of the european sats as the US Dish Network appears to use l/h & r/h circular polarisation rather than the usual h/v polarisation, so i'm guessing that i may have to change it or be stuck with the same problem i have with my BSB squarial. Whats the difference regarding dB figures? :? I am intending to set my 80cm dish up for 19.2e and 13e, leave my sky minidish at 28.2e and hopefully set my newley acquired dish network 500 20" dish at 5w and 1w if it works. Which lnbs would be best suited for each satellite location? Help with these questions would be most appreciated. Thanks nano. __________________ Sanity is nothing more than an excuse to be boring

21-08-06, 11:56 PM	#2 (permalink)
Mickha Super Moderator Join Date: Feb 2006 Posts: 5,004 Thanks: 44 Thanked 1,215 Times in 862 Posts	Re: lnb dB levels. Whats the difference? The lower the db level the better the LNB, in theory, but some of the readings are spurious, and can't be believed.

22-08-06, 10:51 AM	#3 (permalink)
Jimdefruit Super Moderator Join Date: Jan 2006 Posts: 2,858 Thanks: 20 Thanked 221 Times in 187 Posts	Re: lnb dB levels. Whats the difference? nanochickin, It would be interesting to see the signal levels and quality you get with each of the lnbs. Mickha is right, past comparisons have shown .3 nbs of one make to be no better than other makes who quote .6. The most important thing is to go for the better makes such as MTI Blueline or Invacom, but then you already have yours. Lets hope you get good results __________________ Dreambox 800 HD; Dreambox 7000s + VBox + Channel Master 1.2 with 36v actuator CM120 feedhorn and Invacom .3 LNB Skystar 2 PCI card with links to my Dreamboxes If you like what you see here, tell your friends.