No relays here either. PA is on all the time when I am likely to want to TX, no output from the Pluto and pre-amp until I send data via OBS. I am a GREAT believer in keeping this stuff simple. PA is powered via one of those cheap 433 MHz radio switched 13 amp socket adapters so I don't have to go outside to the (by the dish) set up to switch it on and off.
Pluto and pre amp and LNB are powered up 24 hours a day, 7 days a week (keeps some warmth in the box and humidity low), plus things usually blow up when turned on) and only get rebooted if there's a power cut or I need to power down to modify anything. Warning lights on the boxes by the dish show if mains is available and if the PA is powered up.
No data feedback showing temperatures, output power, SWR et cetera, if it blows up, it blows up....

A LAN cable and a single LNB cable come into the house to the Minitiouner with dual FT2232H modules in it. A quad output LNB allows simultaneous reception of narrow and wide band. One dish TX's and RX's simultaneously if required. The dish mounting is OTT, heavy and well concreted in a deep hole, and has never allowed the dish to move in three years. I am used to making things as light as possible, it hurt doing Forth Bridge engineering
KISS

And I don't needlessly fiddle with it either <LOL> If it ain't broken....
I bought a relatively cheap gizmo used by model plane flyers to check RF output and level, I can't recall the make but it was off Ebay. My HP8665B spectrum analyser doesn't go high enough. Sounds like the original poster might find one useful?
I really think the OP should let someone more knowledgeable access his PC (in person if the paranoia is strong

).