the spectrum analyzer graphs/plots the 1,3,5,7, etc harmonics, it shoulds the gains for each harmonic displayed in dbs of each harmonica spectrum analyzer to be sure you are not tuning it to a harmonic
So how would you know you're not tuning to a harmonic?
Tuning: means adjust the LC network for Gain output at the desired frequency
The Desired Frequency is Matching the transmitters frequency with the recievers frequency?