hi all,
Does poty orientation matter ?
Please see my pics is there any particular way the poty should be lined up ?
Have a look at mine and tell me if its ok?
Many thanks
hi all,
Does poty orientation matter ?
Please see my pics is there any particular way the poty should be lined up ?
Have a look at mine and tell me if its ok?
Many thanks
The uplink uses circular polarisation so the line-up does not matter.
That is not true for the receiver which is vertical for the NB transponder and horizontal for the WB transponder. For this reason, the angle of the LNB *does* matter. What makes things worse is that unless your azimuth is 180 degrees, your view to the sat will be squinted. For this reasons, for optimal performance, the LNB must be twisted a little bit. You can use sites like dishpointer.com to find the "LNB skew".
Note: there is an easier way: it is easier to find the null of the signal and the max is 90 degrees away. So, turn the LNB to "null" the signal (for instance, beacon), then turn the LN exactly 90 degrees CW or CCW and you are set.
The 3rd issue is the distance between the base of the POTY and the black plastic carrier of the dish. I think your POTY sticks out much too far: I think it should be flat (but someone please correct me!). You will run into two problems if you do things this way:
Hope this helps!
many thanks for the reply.
Its working ok for now so I'll tweak it again, thanks for all the tips and noted
with a better lens and a better position you can improve your rx and tx signal
either hack away from a commercial rocket lnd or print your own (drop me a mail if you need a print file)
reflector should almost touch the lnb clamp
try to avoid angled connectors (they produce more loss as half a metre cable bent in a nice wide open curve)
greetz sigi dg9bfc