Advice Needed LNB Skew for 68.5e

[kingkad]

Hi Guys

Have a titanium C2W-PLL Wideband C-band LNBF Dual on a 3.8m Prodelin (inverted setup due to sat be low on horizon)

The required skew is quoted as -36.5°

The LNB has markings as pictured below. I don't understand where the markings need to be to achieve -36.5°.

Any advice?

 

[Archive-8]

 

[Archive-8]

View attachment 80458
View attachment 80460

- is west

Now use a protrator to rotate the lnb by 37.5° west

 

[kingkad]

So put 0 marking on LNB at the top 0 degrees and turn anti clockwise 37.5?

 

[kingkad]

Also ifi its 180 degrees out thats fine also right?

 

[Archive-8]

So put 0 marking on LNB at the top 0 degrees and turn anti clockwise 37.5?

On the titianium C1-Pll 0° is at the bottom.

Then turn it 37.5° west.

Yes 180° out will still work.

 

[kingkad]

Ok confused again, 37.5° west is what? clockwise or anti? and if its inverted?

 

[Archive-8]

Ok confused again, 37.5° west is what? clockwise or anti? and if its inverted?

Looking at the lnb with your back to the dish, you turn the lnb anti clockwise.

 

[Channel Hopper]

The optimal position is with a meter (or decent receiver) attached to give minimal signal from the opposite polarity.

You cannot achieve the best position using simple geometry on an offest dish (is it still inverted ?), sited on an az/el mount without your exact co-ordinates.

Are you looking for that one broadcast/temp feed again ? (it may be on a different skew setting anyway )

 

[moonbase]

Can a Horizon satellite meter be used with a C Band LNB to get the skew optimised?

I have an older version Horizon meter ( pre USB ) that I can load with both the H and V beacons for 68.5E but if the beacon frequencies are in Ku Band then it will not work. Does anyone know if there is a C Band beacon satellite list available for Horizon meters?

I had a look around the Horizon web site but could not find any information on the beacon frequencies they use in their meters for 68.5E?


Rgds

 

[kingkad]

@ Channel Hopper - Hi, long time, hope your doing well. Yep still those same religious feeds. Usually lock them OK but always tweaking for improvement. Just found that im not pulling in all the TP's that some of the others in the same footprint are with even smaller antennas, hence reason for another tinker.

 

[Channel Hopper]

Can a Horizon satellite meter be used with a C Band LNB to get the skew optimised?

I have an older version Horizon meter ( pre USB ) that I can load with both the H and V beacons for 68.5E but if the beacon frequencies are in Ku Band then it will not work. Does anyone know if there is a C Band beacon satellite list available for Horizon meters?

Rgds

All Horizon meters afaik can be programmed with bespoke frequencies. Have a look at their website for the upgrades and editing suite.
The Horizon USB that I have does have a dB ratio setting that can be used to find the minimum cross-pol and is in virtual real-time.

 

[Channel Hopper]

@ Channel Hopper - Hi, long time, hope your doing well. Yep still those same religious feeds. Usually lock them OK but always tweaking for improvement. Just found that im not pulling in all the TP's that some of the others in the same footprint are with even smaller antennas, hence reason for another tinker.

Is the dish still at the same location and did you ever find/fit the missing bolt on reflector panel 3 ?

 

[moonbase]

All Horizon meters afaik can be programmed with bespoke frequencies. Have a look at their website for the upgrades and editing suite.....

I found the C Band satellite beacon lists on the Horizon web site, they were down at the bottom of the list of selectable satellites. I created a custom file and flashed it to my meter OK.

There were 3 C Band beacons listed for 68.5E

CH IS20 Dis 68.5
CH IS20 Ewt 68.5
CV IS20 Sun 68.5

Looking at Lygnsat there are only Landmass H and Landmass V beams listed for 68.5E and the Intelsat web sites only lists one beam for C Band from the satellite with both H and V polarities. Does anyone know what these 3 satellite beacons relate to for 68.5E, possibly old beams ?


Rgds