offset dish help

[RidgeRunner]

sorta confused here I got everything ready to go, but I ran out of day light. So tommorow I can go out and will be all ready to peak the dish. I have a 1.2m channel master dish. The book says that its offset is 22.6....I should have everything set correctly on the polar mount.

Question is when I try for AMC6 which is 39.3 elevation, do I need to factor my offset in some way I read a thread where someone no I dont, but some some of the other replies confused me. I do have an inclinometer that I can put right on the dish. Hopefully I should be able to figure this out on my own tommorow but I'd like to clear up this offset confusion.

 

[Bountykiller]

No you do not need to account for it. Use the elevation markings you find on the back as you would any other dish. They have accounted for it already. If there are no markings you just need to make an educated guess to find a known number etc and use it as a reference. I advise using a signal meter for the job.

-B

 

[RidgeRunner]

ahh

Well I have a polar mount, so I was sticking a inclinometer on the back center of the dish, I was getting a little confused if I needed to do something with that 22.6 degrees.

 

[RidgeRunner]

I think I figured it out using this site http://www.satsig.net/22-deg-offset-dish.htm Problem is I dont have any scale to go by other than my magnetic craftsmen protractor. So If I have it right for me to see amc6 satfinder says 39.3 well my dish has a 22.6 offset so that would be 62.2 reading on the protractor. I think I have this right. Atleast if I am understanding that site right.

 

[SatelliteAV]

If the dish is perfectly vertical (straight edge laid vertically on the edges of the dish and your magnetic protracor reading zero) the dish is actually aimed at a point in the sky 22.6 degrees in elevation.

To aim at 39.3, subtract 22.6 from this elevation to calculate 16.7. Tilt the dish up until your magnetic protractor reads 16.7. The dish will actually be looking at a point 22.6 degrees higher than the 16.7 degree reading that is displayed by reading the vertical angle of the dish face.

Mechanical variances in the construction and assembly of your dish will require you to fine tune the elevation setting to locate and peak the signal quality on the satellite.

 

[RidgeRunner]

OK thanks thats what I was trying to figure out, outta make more sense tommorow when I'm outside tweaking things up!

Thanks

 

[Bountykiller]

My point was that any decent dish has the proper elevation markings on them. I own three offsets, all of which have elevation markings on them which account for this automatically. You should not have to add this up yourself unless there are no markings on the dishes! The regular dishnet and dss dishes are like this too!

-B

 

[kstuart]

My 100cm Winegard dish has 5 degree elevation markings - but no numbers identifying them.