D2 (Freeview) & IS8 (Arirang World Ku) on SKY dish

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sar10538

26 posts

Geek

# 77273 13-Feb-2011 23:06

First post here, please be kind.

I have a 65cm SKY dish which I'm currently using for Freeview but would also like to view one channel, Arirang World, on the Intelsat 8 sat. The dish I have has a "standard" SKY dual LNB with with a freq of 10750 and is mounted on a single throat bracket (I think I'm describing this correctly). As I understand it, it may be possible to receive both sats on the single dish but I have no idea how to do this. D2 seems to be at 160 deg and IS8 is at 166 deg which makes 6 deg between them. Also Freeview and Arirang World are on two different polarities.

I'm in Christchurch and would welcome any help from the forum or locally at a reasonable cost.

Cheers, Steve

mm1352000

1139 posts

Uber Geek

Trusted

# 439050 14-Feb-2011 00:10

First off, welcome to the forum. :)

Okay, so you have the Sky dual LNB. That LNB is specifically designed to pick up Optus D1 (160e) and Optus C1/D3 (156e). I think you'll find it tough to pick up IS8 and D1 with that LNB for two reasons:

1. The separation is wrong - 4 degrees instead of the 6 degrees between D1 and IS8.
2. The skew of IS8 + D1 probably wouldn't work with an LNB designed for D3 + D1.

I'm not an installer so I can't really be sure of this, but two LNBs at 6 degrees separation on a 65cm dish may give quite a bit of rain fade trouble for the second LNB even if you weren't using the Sky dual LNB. I'd probably recommend that you get a second dedicated dish for Ariang. As usual, a local installer who knows what he/she are doing will be able to give you the best advice for your situation...

RunningMan

5613 posts

Uber Geek

# 439071 14-Feb-2011 07:35

I think you may have a problem with the 6 degrees not being far enough apart for a dish that small. On a 65cm dish, with 2 LNBs you can get D1/D2 which are 8 degrees apart, but the LNBs are almost touching each other, and I expect you won't get them close enough together.

You could either run 2 LNBs on a larger (90cm) dish, or run 2 seperate dishs. I don't know how big a dish is reccomended for IS8 to ensure a reliable signal either...

sar10538

26 posts

Geek

# 440963 17-Feb-2011 23:43

Thanks for your replies. Looks like I have two options, replace existing dish with larger and use dual LNB or install second dish. It would be nice not to disturb the existing Freeview dish and, if a smallish 65cm dish is suitable for IS8, I may be able to find a second dish cheaply. I should be able to mount it under the existing dish and still get a perfect view of the sky.

Steve