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Originally Posted by tidzu
Thanks for the tips. I did setup the dish elevation and the motor angles correctly.
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Well, relative to the setting being made correctly, obviously something isn't correct. Often people set the angles that are indicated by the instructions, but are often confused because different instructions assume different markings on the dish and motor, etc. I'll comment on the dish aim down below, but first wanted to comment on the LNBF settings.
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Originally Posted by tidzu
Also, I don't have any swtiches and my LNBF is a dual FSKU2v. I am not sure about the type of the LNBF. I need to check the box. However, when I was in the receiver setup mode, I saw the LNBF type was UNIVERSAL. Do I need to change this or the receiver automactially detects the correct type of the LNBF? It keeps raining here for the last couple days and I have not had a chance to try out the tips I received so far from this forum yet. |
No, the receiver doesn't know what kind of LNBF you have, and you'll have to make sure it is set properly on each satellite. The receiver actually receives from 950-2100 MHz, and the LO / LNBF type setting only tells it what to subtract from your freq. Ie if enter 11966, and are set on the 9750/10600 universal, it will choose 10600 and subtract to get an IF of 1366, but if you have the wrong LNBF type, or if the LNBF isn't switching properly, it will come up with the wrong frequency.
Re the alignment of the dish, it LOOKS like you are using the OK numbers, however, in case you are being confused by the markings on the dish and or motor mount, I've put together a short description of where those numbers came from.
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Dish aim from Lat= 47.6 Lon= 122.3
Due south satellite= Galaxy 10r at 123.0 deg
For a prime focus fixed Az/El Dish
Azim= 180.9 elev= 35.3
For a prime focus motorized dish
Declination= 6.41 { note the
Sadoun chart is WRONG}
Approx Lat Setting = 48.28 { Angle relative to ground}
For an offset motorized dish
Approx Lat Setting = 48.28 { Angle of motor shaft relative to ground}
{straight part of motor shaft, not bent part}
Declination= ?
Note, I say "?" because this angle in actuality is the same as for a prime focus dish,
however it is influenced by the angle at the end of the motor shaft, and the number of
degrees of offset of the dish itself (typically 22.5 deg), and it is also influenced by whether the markings on the
dish elevation adjustment on the dish mount and motor mounts are elevation numbers or latitude numbers.
Ie if the dish is pointed toward the horizon when the dish elevation numbers are small, then
they are elevation numbers, and if the dish is pointed high in the sky when the numbers are
small, then they are latitude numbers.
The easy adjustment is the motor elevation, once you determine whether the markings are
elevation or latitude. If the markings are latitude, set it to the number listed above for the Approx
Lat Setting. If the markings are elevation, set it to 90 degrees minus the above number, ie= 41.72
Typically, the actual offset of the dish itself can be ignorred, provided that you use the elevation
markings on the dish mount, and know if they are elevation or latitude markings. Ie, if the motor shaft was
straight, with no bend, then you would need a negative setting on the dish mount to attain the
declination setting, and this setting is not attainable on most dish mounts. However thanks to the angle
on the motor shaft, this becomes a positive number. I don't know exactly what the angle on the
various motor shafts are, but from the pictures, it looks like the HH-100 is about 30 degrees, and that
of the HH-90 looks like about 45 deg . If this is the case, then with the HH-100,
dish elevation should be 30- 6.41=23.59, and for the HH-90, 45-6.41=38.59 .
If the dish elevation is marked as latitude, then this should be 90 minus these numbers.
I'm assuming that my 38.59 number above corresponds to the 37.9 number that the Sadoun calculator
gives, given that the Sadoun declination is off by about 0.7 degrees. Note, that this 0.7 deg difference is
partially accounted for by the latitude setting being 0.7 degrees lower, which will make the alignment the same
for due south sats, but off a bit for sats to the east or west.
Anyway, as you see, the above calculations give you approximately the same numbers you were using,
ASSUMING that you were not confused by possible differences in the way the angles were marked on the
dish or motor mount, ie there is often confusion between the elevation markings and the latitude markings.
However, the above calculations will demonstrate how to alter your adjustments if the markings are different
from what is assumed in the Sadoun calculator. Also, some people get confused between the instructions
given in the motor manual and the dish manual and the Sadoun instructions, which have different ways of
saying the same thing.
Hope this is of some use.
