Queries about arc


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Old 11-03-2008   #1
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My System: Humax HDCI-2000 T_Rex 4.6 supermodule Big Dish with 1.2LNB CAS 3+ Programmer
Queries about arc

But I am still confused, not by the procedure, but by the individual satellite arc angles!
I have a moteck SG2100a and using GAAPS to set up my dish as instructed in the manual.
I am at Long 1.03 W & Lat 50.70N, when I set my dish up, on a satellite, Ive stored it and let my Humax HDCI-200 recalculate all the angles for the other satellites, but when I drive to them I have to fine tune their position by a few degrees and then store each satelite position i can recieve.
So having done some investigating using Gaaps on the Moteck website.
for my latitude and longtitude in the UK, the further east you drive the dish to a given satellite position in space the greater the angle on the motor actually needs to be.
examples for my location using GAAPS:

True South, 0 degrees = Motor Angle 1.1 East Diff 1.1degree
Thor, 0.8W = Motor Angle 0.3 E Diff 1.1 degree
Hotbird, 13.0E = Moto3 Angle =15.4 E Diff 2.4 degree
Astra 1, 19.2 E= Motor Angle = 22.1 E Diff 2.9 degree
Astra 2 28.2 E= Motor Angle = 31.9E Diff 3.7 degree

also the further west your loacation the greater the difference in degrees between satellites.

This nicely leads on to my questions now,
1. When I align my dish to the motor for hotbird for my location, should the motor angle pointer be showing 13 or 15.4 degrees. when i have the dish set for the strongest signal

2. When i store my datellite posistion in the reciever and recalculate, and select Astra 2 will the motor drive to 28.2E degrees, 30.6E degrees ( orbital azimuth diference between Hotbird and Astra 2) or 31.9E degrees as required according to GAAPS.

It seems to me that when you start aligning the dish in azimuth, you must use GAAPS, to work out a satelite angle you want to initially tune into, and drive the motor to this angle, you can then adjust the clamps for the motor to mouting pole and Dish to motor Clamps for maximum signal strength.

Can any one explain?
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Old 11-03-2008   #2
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Is your Pole 100% level ?

2 mm can make all the difference...
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Old 11-03-2008   #3
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My System: Sky+, DB 7000s, Gemini 4.3 in flash, Var on USB stick. Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Unaohm EP313, Swires Annie 204 Spectrum, Rover ST-4 Spectrum.

Blurry hell, my head's spinning after reading that.

You are getting far too involved with figures.

All you have to do is:

A) Make sure your mast is plumb and your motor is set to the correct elevation

B) Reset the receiver and then using USALS, GoToX, or GAAPS, had not heard of the latter until today, enter your coordinates and send the dish to Thor 0.8W.
C) Then, by swinging the whole assembly on the mast and adjusting the dish elevation (called declination), find Thor.

Job done, you do not need to calculate anything.
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Old 11-03-2008   #4
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My System: 43cm Dish, Sky Plus, FRACARRO PENTA 85, Invacom Twin, Moteck SG2100a H-H DiSEqC Motor, TF5000CI, TM-5200D, Rover Discovery ST-4, Rover SDM-1s, 57E to 58W

I think using Gaaps is a way of setting up the dish by DiSEqC 1.2 only from what I gather from reading the same manual?

So Gaaps refers to DiSEqC 1.2, Rolf????
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Old 11-03-2008   #5
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No, according to the Moteck site is is the same as GotoX, but as I said above, had never heard of it prior to the post above and had to look it up.
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Old 11-03-2008   #6
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Originally Posted by rolfw View Post
Blurry hell, my head's spinning after reading that.

You are getting far too involved with figures.

All you have to do is:

A) Make sure your mast is plumb and your motor is set to the correct elevation

B) Reset the receiver and then using USALS, GoToX, or GAAPS, had not heard of the latter until today, enter your coordinates and send the dish to Thor 0.8W.
C) Then, by swinging the whole assembly on the mast and adjusting the dish elevation (called declination), find Thor.

Job done, you do not need to calculate anything.
you took the words right out of my mouth....
mate why make a simple job complicated?
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