Here are measurements taken on the 1m dish.
Dish top to LNB: 37 to 38"
Dish centre to LNB: 24.5 to 26"
Dish bottom to LNB: 24 to 25.5"
The variation is due to where on the LNB you measure.
The distance measured from dish top to LNB suggests I pulled the LNB arm too high. But I pulled the arm up and then tweaked the exact position while watching the SQ on the receiver. So I was effectively tuning the LNB's position.
I'm satisfied I am hitting the dish sweet spot. The PLL LNB may also make up for any small discrepancy for where the LNB is. I'm using the original LNB holder, therefore the LNB is pointing where that holder points it.
In attached pics, you can see original LNB, the fact the dish installation shows the dish is slightly rotated clockwise and the view the LNB sees looking at the dish.
Added: I have another identical dish I used this summer to try to receive PBS on 125W. I failed thinking leaves were blocking the signal. Perhaps I need to try tuning its LNB arm. I will give this another go later after the autumn leaves have fallen.
Sent from my SM-G950W using the
SatelliteGuys app!