As I wrote before the new Sperling PDM-1 supports me in adjusting the Azimuth on my tables & carts, which I did before visually with quite some good results.
This measurement shows the Azimuth is a very little left bounded. The PDM-1 will be active after 5 minutes due to the two build in amplifiers. The 1kHz signal picked up from the record provides three results, for the left and right channel and an additional one for the difference between the channels – quasi a magnifier.
When turning the connection block of the headshell in the clockwise direction you change the Azimuth a little into the exact position.
This picture shows the difference measurement (when playing the 1kHz signal) between the two channels after correction.
in this case it was just a small adjustment. Nevertheless it improves the tracking.