When Aligning your SM with the toners are u supposed to get a steady hih pitch are is it supposed to fade in and out.

As you align the SM, the tone will increase in volume with each increase in dB and the cadence with increase in speed as the jitter goes down.

Ultimately a steady tone with little or no warble is ideal. What you are most concerned with is the tone starting and stopping as that indicated losing and regaining registration.