Satellites visible from a toroidal dish in South England + DiSEqC setup

On 31/12/2012 19:04, R. Mark Clayton wrote:
"Seri Al-Najjar" wrote in message
...
On Monday, 31 December 2012 18:02:19 UTC, R. Mark Clayton wrote:
You certainly do NOT want to be trying to align this lot on a chimney
stack
up a ladder!

That plan has now been scrapped. Am looking at either a mast installation,
or, more likely and a bit odd, but on top of the pergola, only issue there
is the length of cable run it a bit much.

Use CT 125

SNIP

You may want to rationalise which birds you have LNB's for, choosing the
birds with channels you want to see.

My thought is to aim for as many as possible and then reduce it down as
realities and configuration issues become apparent.

Thanks for all the pointers, it's much much appreciated.

Well let us know how you get on.

I was thinking of doing something like this for our flats: -

Torroidal dish with 4 LNB's
|||| |||| |||| |||| + terrestrial
EMP Centauri 17x16 multiswitch
| | | | | | | | | | | | | | | |
10 flats, twin in 6 of them



important word left out... Quattro. Multiswitches (with few exceptions
use Quattro LNB's

Incidentally, what 4 positions are you going for?

I plan to do something similar,

use a 5x16 multiswitch for freesat/sky only and a 17x16 multiswitch for
4 extra sat positions.

the 5x16 I have a is a Triax and the 17x16 I have is an EMP centauri.

Regards

Stephen.

"Stephen H" wrote in message
...
SNIP

I was thinking of doing something like this for our flats: -

Torroidal dish with 4 LNB's
|||| |||| |||| |||| + terrestrial
EMP Centauri 17x16 multiswitch
| | | | | | | | | | | | | | | |
10 flats, twin in 6 of them



important word left out... Quattro. Multiswitches (with few exceptions use
Quattro LNB's

Latest EMP units use either.


Incidentally, what 4 positions are you going for?

28E, 19E, 13E and another (probably by voting).


I plan to do something similar,

use a 5x16 multiswitch for freesat/sky only and a 17x16 multiswitch for 4
extra sat positions.

the 5x16 I have a is a Triax and the 17x16 I have is an EMP centauri.

Where did you buy it, or di you order it direct?

BTW if you make the 28E the first LNB it will still work OK on that as the
first position for $ky boxes (IMO).


Regards

Stephen.

"Paul Ratcliffe" wrote in message
...
On Mon, 31 Dec 2012 05:50:02 -0800 (PST), Seri Al-Najjar

wrote:

My hope is that with a 90cm toroidal dish I will be able to see from
South London:
28.2E
23.5E
19.2E
16E
13E
9E
7E
4.8E
0.8W
4W
5W
7W

The dish is supposed to have a range of 40 degrees and by my calculations
those cover an arc of 35.2 degrees.

Only if you are at the centre of the Earth.
As you are presumably on the surface, the angle is somewhat larger.


Read the spec' it will cover a 40 degree arc and anyway from the point of
view of satellites at 40Mm we are near the centre of the earth.

R. Mark Clayton wrote:
There are birds at 3.5, 8 and 12.5W and not much on any of them, except that
8W has some Arabic channels, BUT pointed at Arabia, so no chance in UK -
not sure where you got the positions below unless they carry residual
analogue.

4W
5W

Atlantic Bird at 5.0W - some major FTA French channels inc. France 2, 3,
and 5. Regular viewing (for me).

On 31/12/2012 18:35, Seri Al-Najjar wrote:
On Monday, 31 December 2012 17:39:33 UTC, Michael Chare wrote:

Buying Diseqc 1.1 switches in the UK is not that easy. I have four and I

had to order them from Germany. To get the lowest price I had to use a

shop that wanted a money transfer in advance.

Michael, it seems that basic cheaply manufactured DiSEqC 1.1 switches can be purchased on ebay from the US and shipped over. Doubt they'll be the greatest in the world, but providing the LNBs, focussing & cabling are top notch hopefully they won't cause me too much signal loss.

Have you had any experience with the cheap ones?


The ones I use are EMP Centauri S 8/1PCP-W2 - 9/1 DiSEqC-Schalter

You can set them to use Diseqc 1.2. as well as 1.1 In theory you can
connect a 1.2 switch to each port of a 1.1 switch to support a total of
64 LNBs.

On Mon, 31 Dec 2012 23:45:16 -0000, R. Mark Clayton
wrote:

My hope is that with a 90cm toroidal dish I will be able to see from
South London:
28.2E
23.5E
19.2E
16E
13E
9E
7E
4.8E
0.8W
4W
5W
7W

The dish is supposed to have a range of 40 degrees and by my calculations
those cover an arc of 35.2 degrees.

Only if you are at the centre of the Earth.
As you are presumably on the surface, the angle is somewhat larger.


Read the spec' it will cover a 40 degree arc

I know what was written thankyou as I just quoted it above.

and anyway from the point of
view of satellites at 40Mm we are near the centre of the earth.

No we're not. The diameter of the Earth is a significant proportion
of the distance to the satellite.
Kindly get your head out of your arse.

On 31/12/2012 23:44, R. Mark Clayton wrote: "Stephen H"
wrote in message
...
SNIP

I was thinking of doing something like this for our flats: -

Torroidal dish with 4 LNB's
|||| |||| |||| |||| + terrestrial
EMP Centauri 17x16 multiswitch
| | | | | | | | | | | | | | | |
10 flats, twin in 6 of them



important word left out... Quattro. Multiswitches (with few exceptions use
Quattro LNB's

Latest EMP units use either.

That is a welcome development as I was originally using Quad LNBs on 4
lots of 4 port diseqc switches. The diseqc switches were too problematic
for my liking so converted to a full multswitch system, which also meant
scrapping the quad LNBs too.


Incidentally, what 4 positions are you going for?

28E, 19E, 13E and another (probably by voting).

as mentioned earlier, I have two multiswitches. the freesat and sky
boxes will feed off the triax, while the proper satellite receivers will
feed off the EMP Centauri.

The proper sat boxes have 12 volt switching on them so I can use a 12
volt switch to access the sky/freesat system if necessary.

19.2E and 13.0E seems de rigeur. Now my problem is what to use for the
3rd and 4th position.....


I plan to do something similar,

use a 5x16 multiswitch for freesat/sky only and a 17x16 multiswitch for 4
extra sat positions.

the 5x16 I have a is a Triax and the 17x16 I have is an EMP centauri.

Where did you buy it, or di you order it direct?

Someone in Ireland had bought the EMP Centauri and 4 Alps bullet nosed
Quattro LNB's from Germany. I don't know the full story but it never got
installed. I then got the EMP Centauri & 4 ALPS bullet nose LNB's off
him for the princely sum of £100...... :-)

I have a Triax TD110 with Mult LNB bracket. I want to swap this for the
Wavefrontier T90.

BTW if you make the 28E the first LNB it will still work OK on that as the
first position for $ky boxes (IMO).

That is my understanding too. in my case this will not be an issue due
to using two multswitches.



Regards

Stephen.

"Seri Al-Najjar" wrote in message
...
Now that I've been thoroughly turned away from my initial plan of mounting
the dish on the chimney, while I'm investigating alternative locations I'm
planning out the configuration of the LNBs and DiSEqC setup.

My hope is that with a 90cm toroidal dish I will be able to see from South
London:
28.2E
23.5E
19.2E
16E
13E
9E
7E
4.8E
0.8W
4W
5W
7W

The dish is supposed to have a range of 40 degrees and by my calculations
those cover an arc of 35.2 degrees.

The dish details day that satellites that are less than 1.5 degrees apart
can be picked up by a single LNB, so I'm hoping that focussing and LNB at
4.5W will pick up both 4W and 5W.

All the LNB's will be feeding 4 DVB-S2 tuners in a Linux server with
software that supports DiSEqC 1.0/2.0 & 1.1/2.1, the tuners say they
support DiSEqC 1.0/1.1/1.2 & USALS. So as far as I can tell, most basic 8
way DiSEqC switches should work with no problems.

Now for the hard part, I'm trying to minimise the chance of LNB blocking
by distributing the LNB's across the DiSEqC switches as resilient as
possible, so my plans for LNB focussing and DiSEqC mapping is:

28.2E - Quad LNB - Sw1:Pt1 / Sw2:Pt1 / Sw3:Pt1 / Sw4:Pt1
23.5E - Dual LNB - Sw1:Pt2 / Sw2:Pt2
19.2E - Quad LNB - Sw1:Pt3 / Sw2:Pt3 / Sw3:Pt3 / Sw4:Pt3
16.0E - Dual LNB - Sw3:Pt2 / Sw4:Pt2
13.0E - Quad LNB - Sw1:Pt4 / Sw2:Pt4 / Sw3:Pt4 / Sw4:Pt4
09.0E - Dual LNB - Sw1:Pt5 / Sw4:Pt5
07.0E - Dual LNB - Sw2:Pt5 / Sw3:Pt5
04.8E - Dual LNB - Sw1:Pt6 / Sw3:Pt6
00.8W - Quad LNB - Sw1:Pt7 / Sw2:Pt7 / Sw3:Pt7 / Sw4:Pt7
04.0W and
05.0W - Dual LNB - Sw2:Pt6 / Sw4:Pt6
07.0W - Quad LNB - Sw1:Pt8 / Sw2:Pt8 / Sw3:Pt8 / Sw4:Pt8

Any thoughts, concerns, problems with this setup? I'm completely new to
this, at the moment I just have 4 feeds from a regular Sky minidish with
Quad LNB feeding into my server with 4 DVB-S2 tuners for freesat. I'm now
looking to step it up a bit and bring in some European free-to-view
goodness.

Many thanks,

Seri

I hope you realise that there is very little to watch or worth watching
across Europe. Most is encrypted or in Polish. I use a rotator to watch
Spanish and French TV but there isn't much else.

"Paul Ratcliffe" wrote in message
...
On Mon, 31 Dec 2012 23:45:16 -0000, R. Mark Clayton
wrote:

My hope is that with a 90cm toroidal dish I will be able to see from
South London:
28.2E
23.5E
19.2E
16E
13E
9E
7E
4.8E
0.8W
4W
5W
7W

The dish is supposed to have a range of 40 degrees and by my
calculations
those cover an arc of 35.2 degrees.

Only if you are at the centre of the Earth.
As you are presumably on the surface, the angle is somewhat larger.


Read the spec' it will cover a 40 degree arc

I know what was written thankyou as I just quoted it above.

and anyway from the point of
view of satellites at 40Mm we are near the centre of the earth.

No we're not. The diameter of the Earth is a significant proportion
of the distance to the satellite.
Kindly get your head out of your arse.


The RADIUS of the earth is ~6M4m; the radius of the Clarke belt is ~42Mm, so
the surface is only about 15% of the distance from the centre of the earth
to the satellites. I think it is you who has your head in your arse,
because you are clearly talking our of it!

so

from the point of view of satellites at 36Mm above the ground we are
[fairly] near the centre of the earth.

On 01/01/2013 10:31, Geoff Pearson wrote:

"Seri Al-Najjar" wrote in message
...
Now that I've been thoroughly turned away from my initial plan of
mounting the dish on the chimney, while I'm investigating alternative
locations I'm planning out the configuration of the LNBs and DiSEqC
setup.

My hope is that with a 90cm toroidal dish I will be able to see from
South London:
28.2E
23.5E
19.2E
16E
13E
9E
7E
4.8E
0.8W
4W
5W
7W

The dish is supposed to have a range of 40 degrees and by my
calculations those cover an arc of 35.2 degrees.

The dish details day that satellites that are less than 1.5 degrees
apart can be picked up by a single LNB, so I'm hoping that focussing
and LNB at 4.5W will pick up both 4W and 5W.

All the LNB's will be feeding 4 DVB-S2 tuners in a Linux server with
software that supports DiSEqC 1.0/2.0 & 1.1/2.1, the tuners say they
support DiSEqC 1.0/1.1/1.2 & USALS. So as far as I can tell, most
basic 8 way DiSEqC switches should work with no problems.

Now for the hard part, I'm trying to minimise the chance of LNB
blocking by distributing the LNB's across the DiSEqC switches as
resilient as possible, so my plans for LNB focussing and DiSEqC
mapping is:

28.2E - Quad LNB - Sw1:Pt1 / Sw2:Pt1 / Sw3:Pt1 / Sw4:Pt1
23.5E - Dual LNB - Sw1:Pt2 / Sw2:Pt2
19.2E - Quad LNB - Sw1:Pt3 / Sw2:Pt3 / Sw3:Pt3 / Sw4:Pt3
16.0E - Dual LNB - Sw3:Pt2 / Sw4:Pt2
13.0E - Quad LNB - Sw1:Pt4 / Sw2:Pt4 / Sw3:Pt4 / Sw4:Pt4
09.0E - Dual LNB - Sw1:Pt5 / Sw4:Pt5
07.0E - Dual LNB - Sw2:Pt5 / Sw3:Pt5
04.8E - Dual LNB - Sw1:Pt6 / Sw3:Pt6
00.8W - Quad LNB - Sw1:Pt7 / Sw2:Pt7 / Sw3:Pt7 / Sw4:Pt7
04.0W and
05.0W - Dual LNB - Sw2:Pt6 / Sw4:Pt6
07.0W - Quad LNB - Sw1:Pt8 / Sw2:Pt8 / Sw3:Pt8 / Sw4:Pt8

Any thoughts, concerns, problems with this setup? I'm completely new
to this, at the moment I just have 4 feeds from a regular Sky minidish
with Quad LNB feeding into my server with 4 DVB-S2 tuners for freesat.
I'm now looking to step it up a bit and bring in some European
free-to-view goodness.

Many thanks,

Seri

I hope you realise that there is very little to watch or worth watching
across Europe. Most is encrypted or in Polish. I use a rotator to
watch Spanish and French TV but there isn't much else.

There is a great deal of German TV, quite a lot is in HD.