My 2 dishes are round dishes not elliptical but whats the proper way to measure the size? Is it across the dish as in left to right or top to bottom? One dish measures 36" across but 38" top to bottom and other is 46" across but 48" top to bottom.
Measuring Dish Size
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Ellipticals - Appears the model # doesn't = the dish width.
C/P of the Primestar / ChannelMaster dish info I've kept:
Made by Andrew MFG for Channel Master and Primestar.
Andrew MFG dish division split off and is now ASC Signal.
In 2008 ASC Signal and Raven Antenna
aquired by Satellite Holdings LLC.
Now rebranded Skyware Global.
http://www.skywareglobal.com/
Other product lines owned by CommScope (Coax, fittings etc.)
size, . . width x height
Effective AREA= [Pi]R(sq) = R is 1/2 the width
"Round"
1.2m = 48x52 5684.89194107986176
1.0m = 40x43 3947.841625749904
90cm = 36x39 3197.75171685742224
75cm = 30.5 x 32.5 2295.2997952211551225
DTV in the Trinidad/Tobago (Raven??)
1.15m = 43.5x47.5 4668.9395727032849025
"Elliptical" Area = Pi * A * B ,
A=1/2 H, B = 1/2 W
84e is 40x30 942.47778
75e is 37x27 784.61275185
70e ?? 35x21 632.24551075
60e is 32x20 502.654816
area of the dishes, for comparison, as that is what determines gain.
Elliptical dishes will exhibit adjacent satellite rejection equivalent to a 'normal' offset with the same width. This would be when the dish is skewed to align with the arc. As also occurs with a 'normal' offset on a motor.
I.E. A 75e will have less gain than a 90cm, but exhibit comparable adjacent rejection.
C/P of the Primestar / ChannelMaster dish info I've kept:
Made by Andrew MFG for Channel Master and Primestar.
Andrew MFG dish division split off and is now ASC Signal.
In 2008 ASC Signal and Raven Antenna
aquired by Satellite Holdings LLC.
Now rebranded Skyware Global.
http://www.skywareglobal.com/
Other product lines owned by CommScope (Coax, fittings etc.)
size, . . width x height
Effective AREA= [Pi]R(sq) = R is 1/2 the width
"Round"
1.2m = 48x52 5684.89194107986176
1.0m = 40x43 3947.841625749904
90cm = 36x39 3197.75171685742224
75cm = 30.5 x 32.5 2295.2997952211551225
DTV in the Trinidad/Tobago (Raven??)
1.15m = 43.5x47.5 4668.9395727032849025
"Elliptical" Area = Pi * A * B ,
A=1/2 H, B = 1/2 W
84e is 40x30 942.47778
75e is 37x27 784.61275185
70e ?? 35x21 632.24551075
60e is 32x20 502.654816
area of the dishes, for comparison, as that is what determines gain.
Elliptical dishes will exhibit adjacent satellite rejection equivalent to a 'normal' offset with the same width. This would be when the dish is skewed to align with the arc. As also occurs with a 'normal' offset on a motor.
I.E. A 75e will have less gain than a 90cm, but exhibit comparable adjacent rejection.
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