When I optimize the reading on 99c, will 103ca also come in or do I need to optimize each individually?
No
I am sure there are some do-it-yourselfers that could come up with a better do-it-yourself method.
However, I am tech and only have text book method as it works perfect 100% of the time.
Howwever, I have only ever done this with my meter and never the meter in the receiver so I don't know how well it will work, but I imagine it will do pretty well.
Dithering 101 (since you will be using the meter in the receiver it will best if you have somebody on the phone looking at the receiver to call it out or if you can view a TV while doing this.
Set the box to "signal meeter"
Go up and loosen the 2 bolts on the sides of the back assembly (aka the mount) and the 2 bolts on the bottom of it.
First go to your elevation adjuster (one on the left) and set the dial to "0"
turn back counter clockwise 2 turns and record the signal strength
Then turn the adjustment clockwise counting each turn and number until you reach the same signal strength
Take that # of turns and divide it by 2 (i.e. it took 3.7 full turns divided by 2 = 1.85)
Now, set the dial back to "0" and turn the adjustment bolt back 1.85 turns.
Then tighten the side bolts
Repeat the steps for the Azimuth adjustment (bolt on the right).
Tip, you might need to change the first step from 2 turns counterclockwise to 3 turns on the azimuth.
If you do that with 2 people it will only take a few minutes (ok, maybe a little longer your first time lol).