Far too many angles, what do they all mean and where do they apply to?

[RedDwarf]

What does the polarization angle relate to for setup?

I have been setting up a new dish, not the Penta that I have, the weather has prevented me from installing that. I purchased a Faval 60 which will be okay with planning laws and fits in nicely on the Sky minidish bracket and location.

I have many angles noted down from sites such as Azimuth, Elevation, Polarization, Polar Mount, another Polar angle and LNB Skew. The first two and the last one I know but the others are a mystery. I thought that the Polarization might be the dish angle, looking at the dish the left or right tilt to the dish but I cannot see how that could be done with anything but a Sky style bracket which is rarely used for anything but sky installs.

Will someone please shed some light on this?

 

[satelliteman]

Refers to a rotational position of the LNb or dish (LNb skew or dish skew).

Polar mount is a basically a motorised mount. Technically a DiSEqC motor is a polar mount but we refer them for use with larger dishes and moves on a single axis only. The mount is moved by a linear actuator and as moved from horizon to horizon the elevation will vary.

Polar angle etc can be explained here > http://www.satellites.co.uk/forums/...-angle-declination-offset-dish-elevation.html

 

[rolfw]

If this isn't a motorised dish, all you need to concern yourself with is azimuth and elevation (only a rough guide), then Skew of the LNB relative to whichever satellite you wish to align to.

If it is a motorised dish, you will need a better wall mount than the one used for your old Sky dish.

 

[RedDwarf]

Refers to a rotational position of the LNb or dish (LNb skew or dish skew).

Polar mount is a basically a motorised mount. Technically a DiSEqC motor is a polar mount but we refer them for use with larger dishes and moves on a single axis only. The mount is moved by a linear actuator and as moved from horizon to horizon the elevation will vary.

Polar angle etc can be explained here > http://www.satellites.co.uk/forums/...-angle-declination-offset-dish-elevation.html

Ah, I wrote some numbers down that I got from a site that calculated the alignment data and I have a Polarization angle and a LNB skew angle which confused me. I thought they were separate things and that both needed adjusting. lol that explains why I have not seen any fixed dishes that are inclined left or right, only a slight elevation for the common offset dishes.

If this isn't a motorised dish, all you need to concern yourself with is azimuth and elevation (only a rough guide), then Skew of the LNB relative to whichever satellite you wish to align to.

If it is a motorised dish, you will need a better wall mount than the one used for your old Sky dish.

No it isn't motorised, I cannot get the Penta fitted before I need it because of the weather, the pole I ordered didn't get delivered anyway and I have expected it since Wednesday, so it's a total none starter.

I got myself a new 60cm Faval dish to replace a very old Sky minidish. It will work with the Penta when I get that fitted and the sizes mean no planning permission will be needed. It's a lot quicker to fit too not requiring any new brackets fitting.

Initial testing shows a much higher signal level, I got 80dBuV at one point but had to settle for 72dBuV, which is up from a 64dBuV best, 60dBuV more usual with the old Sky minidish. More adjustment, in daylight and I should be able to improve it further.

I couldn't understand how a motorized system copes with the polarisation/LNB skew for different satellites.

 

[Lazarus]

The Planning Rules refer to two Antennas, not specifically two dishes, so a UHF Yagi and one dish strictly speaking rules out a second dish. But I shouldn't really quibble as I feel certain my own installation pushes the boundaries a little!

As for skew and elevation with a motorised dish, it is the locus described by the motor stub which deals with all that ........... best thing to do is watch a motorised dish panning and it immediately becomes clear. Much harder to explain in mere words..

 

[RedDwarf]

The Planning Rules refer to two Antennas, not specifically two dishes, so a UHF Yagi and one dish strictly speaking rules out a second dish. But I shouldn't really quibble as I feel certain my own installation pushes the boundaries a little!

Oh That might be a problem. The planning portal site shows them as Dishes and makes no mention of Aerials. But it does refer to dishes as Antennas so I guess it's a catch all for both which I overlooked.

If you Have two dishes with one just over the limit that would be less noticeable than two dishes in the limit and a big TV Aerial. If they looked both sides of my home, it would take someone who couldn't count past two to miss it. lol

As for skew and elevation with a motorised dish, it is the locus described by the motor stub which deals with all that ........... best thing to do is watch a motorised dish panning and it immediately becomes clear. Much harder to explain in mere words..

I will try and find a video of one working and that might help me understand it.

 

[sonnetpete]

Have a look at this video, it demonstrates the movement of the motor stub quite well

[tube]WxorHnvRpOg[/tube]

 

[rolfw]

The Planning Rules refer to two Antennas, not specifically two dishes, so a UHF Yagi and one dish strictly speaking rules out a second dish. But I shouldn't really quibble as I feel certain my own installation pushes the boundaries a little!

Pretty sure that they specifically relate to dishes, as the maximum measurements they give could not apply to UHF antennae, as couldn't the "must not be higher than the chimney" rule.

 

[Lazarus]

Well you may be right, Rolf ........... I also initially assumed you could have two dishes and a Yagi (for instance) and think that is the popular belief.

However, I find the use of the term Antennae in the headline to be ambiguous, to say the least!

Understand where you're coming from, though.

 

[RedDwarf]

I think I will have to phone my council planning department and ask them. That should clear it up and remove all confusion.

I will say that although they give maximum dimensions for Antennas and those might not apply to regular UHF Aerials, the rules might be written so they apply to everything so no one can get around them. So the maximums could still apply to UHF Aerials as a catch all rule.

But you are right about the chimney part, many Aerials are mounted above the Chimney. So it's very unspecific, they should make it far clearer than it is IMO.

 

[Lazarus]

I have to say that despite my own recognition of the ambiguity in the guidelines, a great many of us do have two dishes and a yagi (possibly more..............) and have never been troubled by conscience, neighbourly objection, or a visit from the Council.

It is perfectly possible that the very presence of ambiguity will lead to different interpretation by different Local Authorities - perhaps even by individual Planning bods.

Perhaps, therefore, you might re-assess the idea of taking advice, just in case you find the answer not to your liking?

If you can put your hand on your heart and justify two dishes in your circumstances, then go ahead.

The worst that can happen is a remote chance of you being asked to remove one - and then your trump card of "interpretation" can be brought to bear.