@oldheavymech is exactly right. One can't assume the O-scope is calibrated, especially, if like me you bought it used. Swap leads and then swap horizontal and vertical to see what happens. If you are using the rca out of your phono preamp, that is another variable. You can check the o-scope by using a test CD.
Turntable Oscilloscope Readings
After setup of my cartridge, I used an oscilloscope to verify zenith, azimuth, and anti-skate force using Analogue Productions Test LP. Phase between channels is right on (zenith), and distortion of amplitude sweep is the same for both channels (anti-skate). I minimized cross-talk for the worse channel (azimuth). All good.
The strange thing though, is when measuring channel outputs, the right channel was about twice the amplitude of the left channel as measured on the oscilloscope. However, I can hear NO difference between channels through the speakers. Balance and centering of the sound stage appears perfect.
The components involved are VPI Classic Signature turntable with VPI analogue drive system, Soundsmith Sussuro Cartridge, and Herron Audio VTPH 1-MC Plus. The oscilloscope is connected to the phono preamp via RCA cables using a BNC to RCA adapter at the oscilloscope.
Any ideas about what is going on?
The strange thing though, is when measuring channel outputs, the right channel was about twice the amplitude of the left channel as measured on the oscilloscope. However, I can hear NO difference between channels through the speakers. Balance and centering of the sound stage appears perfect.
The components involved are VPI Classic Signature turntable with VPI analogue drive system, Soundsmith Sussuro Cartridge, and Herron Audio VTPH 1-MC Plus. The oscilloscope is connected to the phono preamp via RCA cables using a BNC to RCA adapter at the oscilloscope.
Any ideas about what is going on?