Door shim test. Set vacuum to 10 inches. Peak on a recorded track and watch the eye pattern on the oscilloscope while opening the vacuum column door slightly. Thread the tape and close the door on the shim. Peak up on a recorded track and remove the shim.
Tape shift with write stack position.
The tracking should change by less than 10 um. Read stack calibration test. Record margin check. Measure the error rates on all 14 tracks in both directions after the reverse pass. If the forward recording is worse than the reverse recording, reduce the head voltage in 1 volt steps until the error rates for forward and reverse passes are approximately equal.