Dish Size Chart
18" = .46cm = 1.5 Foot
24" = .60cm = 2.0 Foot
30" = .75cm = 2.5 Foot
36" = .90cm = 3.0 Foot
39" = 100cm = 3.2 Foot
48" = 120 cm = 4.0 Foot
72" = 180 cm = 6.0 Foot
The following programmes will
help aid you in your satellite calculations
Usefull Links
The Table Below Reflects
Solid Dish Sizes Only
A low noise Lnb can
make all the difference especially in low EIRP areas
EIRP |
LNB Noise in dB |
EIRP |
LNB Noise in dB |
0.6 - 0.7 |
0.8 - 1.0 |
1.1 -1.3 |
0.6 - 0.7 |
0.8 - 1.0 |
1.1 - 1.3 |
35 dBW
36 dBW
37 dBW
38 dBW
39 dBW
40 dBW
41 dBW
42 dBW
43 dBW
44 dBW
45 dBW
46 dBW
47 dBW
48 dBW
49 dBW |
300 cm
240 cm
180 cm
150 cm
135 cm
120 cm
120 cm
110 cm
99 cm
90 cm
90 cm
80 cm
75 cm
60 cm
60 cm |
360 cm
300 cm
240 cm
180 cm
150 cm
135 cm
120 cm
120 cm
110 cm
99 cm
99 cm
90 cm
90 cm
75 cm
60 cm |
480 cm
360 cm
300 cm
240 cm
180 cm
150 cm
150 cm
135 cm
120 cm
120 cm
99 cm
99 cm
90 cm
75 cm
65 cm |
50 dBW
51 dBW
52 dBW
53 dBW
54 dBW
55 dBW
56 dBW
57 dBW
58 dBW
59 dBW
60 dBW
61 dBW
62 dBW
63 dBW
64 dBW |
60 cm
55 cm
50 cm
50 cm
45 cm
40 cm
38 cm
36 cm
34 cm
32 cm
30 cm
28 cm
26 cm
24 cm
22 cm |
60 cm
60 cm
55 cm
50 cm
50 cm
45 cm
40 cm
38 cm
36 cm
34 cm
32 cm
30 cm
28 cm
26 cm
23 cm |
65 cm
60 cm
55 cm
55 cm
55 cm
50 cm
44 cm
41 cm
38 cm
36 cm
34 cm
32 cm
30 cm
28 cm
25 cm |
Guide to DISEqC Motorised Installations
Click here to locate
your Long/Lat you
will require it later.
1. There must be a clear line of sight between the required satellites and
the entire surface of the dish. The line of sight must be free from obstructions, such as
trees, buildings, telegraph poles and wires etc.
2. It is very important to make sure the mount is fixed to a perfectly
vertical mast. Time spent measuring this accurately with a spirit level will save you
hours later on.
3. Set the DiSEqC mount back to zero degrees by connecting the receiver to
the mount. The receiver must be on for the mount to move. It’s easier to do this
before fixing the H-H mount onto the mast and gives you a good idea of the mounts
movement.
5. Once you have done this, the mount should then
be disconnected from the receiver.
6. Fit the H-H
mount onto the mast and do the nuts up only finger tight at this point as all nuts can be
tightened fully later.
7.Use an
inclinometer to set the H-H mount angle. See picture on the right. |
 |
8. This angle should be
calculated from the latitude of the installation location. See the information chart
below for full details. |
9.Fit the dish on to the front of the H-H mount arm and tighten the nuts. The middle of the
dish clamp must be lined up with the centre line on the H-H mount arm. See the picture to the
right below.
10. Connect the LNB to
a satellite meter if possible,as this will help you tweek the signal. Firstly you will need to
find (INTELSAT 707 or Thor) as
both satellites are located at 1° west, and this is the ideal satellite as a reference point. See below for other
suggested meter settings. |
 |
|
SATELLITE |
L/O |
FREQ |
POL |
22 kHz |
S/RATE |
FEC |
1 |
ASTRA 28.2E |
9750 |
10.862 |
H 18V |
OFF |
22000 |
5 / 6 |
2 |
ASTRA 19.2E |
9750 |
10.788 |
V 13V |
OFF |
22000 |
5 / 6 |
3 |
HOTBIRD 13E |
10600 |
11804 |
V 13V |
ON |
27500 |
2 / 3 |
4 |
INTELSAT 707 1W |
9750 |
11540 |
V 13V |
OFF |
26000 |
3 / 4 |
5 |
HISPASAT 30W |
10600 |
12012 |
V 13V |
ON |
27500 |
3 / 4 |
|
11. Move the dish back and forth by
moving the H-H mount clamp attached to the vertical mast. Make sure the dish remains on the
centre line displayed on the H-H mount arm. 12. You will also have to adjust the
elevation to the dish to peak the signal. See picture below. |
 |
13. When adjusting these two movements, use the meter to measure the signal. Once the signal
has peaked, tighten the dish elevation.
|
14. Next, move the dish back by 1° by moving the H-H mount clamp attached to the vertical mast. This will give you
the south position required. See picture below.
15. This is a small movement
and with experience, can be guessed fairly accurately. Take note of the signal loss on the
meter, which occurs when this small movement is achieved.
16. Tighten the nuts on the
H-H mount clamp attached to mast.
17. By following these
instructions accurately, you should now have installed your dish on the arc. |
|
18. To test your installation, re-connect the receiver to the H-H mount.
19. With the satellite
meter still connected, select Astra 28.2E on the meter.
20. Move the dish east
by pressing the east button.
21. Peak the signal on
the meter for Astra 28.2E until you believe it is as good as you can get by moving both
east and west.
22. If you cannot
improve the signal by leaning the dish back and forth then you have probably correctly
found one side of the arc for the dish.
23. With the satellite
meter still connected select Hispasat 30w on the meter.
24. Move the dish west
by pressing the west button.
25. Peak the signal on
the meter for Hispasat 30w until you believe it is as good as you can get by moving both
east and west.
26. If you cannot
improve the signal by leaning the dish back and forth then you have correctly found the
arc for the dish.
|