Earl,
Your 20 MHz scope should be more than adequate do the job for you.
You say you have 50 blocks, but how many on each booster? How many
are over 30' feet away? If you had to put 50 terminations all hanging
off of one booster, they would represent a significant load on your
booster. But I doubt your situation is as serious as this.
Since you have a scope, and I presume you have a basic operating
knowledge of it, you will be able to figure out exactly what you need.
Hopefully Mark and Don will be back next week and offer their advice.
Allan