Offset LNB Guide - Pdf | |
 |
| | Thread Tools | Display Modes |
| | |
| |||||||
29-08-2008
| #1 | ||
| Information Exec  Join Date: 07-05-2007 Location: South Midlands, UK & Lanzarote, Canary Islands, Spain
Posts: 1772
Thanks: 3
Thanked 217 Times in 203 Posts
My System: 43cm Dish, Sky Plus v2, Thomson DSI4214, FRACARRO PENTA 85cm, Invacom Twin, Moteck SG2100a H-H DiSEqC Motor, TF5000CI, TM-5200D, Sling Media, Rover Discovery ST-4, Rover SDM-1s, 57E to 58W, Tecatel 1.35m fixed on 28e, Pace D5430-N |
Quick theory on multi-bracket LNb offset arrangement on a fixed dish. SM
__________________ -  A Detailed DiSEqC Motor Installation Set Up Guide HERE Motor Installation 'Quick' Reference Guide also HERE Satellites UK site Advertisers - | ||
|  |
|
1 Week Ago
| #2 | |||
| Member  Join Date: 01-10-2006 Location: Coimbatore -India
Posts: 20
Thanks: 2
Thanked 2 Times in 2 Posts
My System: 16 feet motorised dish for c and ku band,6 ft offset dish,6ft prime focus,DM500,Tecnosat 1100plus,MetaboxIII,(146E to 25.5E) |
Nice to see the article.Can you give the formula to calculate the distance at which the Lnb's to be located,this will give bit easiness on mounting. Vjkuamr | |||
| |
|
1 Week Ago
| #3 | ||
| Super Moderator  Join Date: 17-05-2007 Location: Kent,UK
Posts: 2919
Thanks: 44
Thanked 381 Times in 370 Posts
My System: TM6800HD+TD110+StabHH90 motor,TM1000D+Orbital 1m +Moteck motor.45E to 45W. 2 x minidishes.DigitAlB movies. A Bigsat BS-S77CX and a Sky Dodgibox. | It depends on the focal length of the dish and the position of the offset satellite relative to the focal one. As a rough guide, this is what I use, and then adjust accurately with a meter. Let L= dish focal length Let a = azimuth angular difference between offset sat and focal one. Let d = spacing of LNB (from centres) Equation:- d= L x tan(a) N.B, if the focal length is unkown, just measure the distance between the LNB and the centre of the dish as a rough guide. This method will aslo work for obtaining a rough estimate of the height difference required also, but this is not as difficult, as it will normally be a lot smaller. Robbo 
__________________ | ||
|
| |
Linear Mode
