P3 Motor pulsing

I just picked up a used P3. I'm still waiting for a cartridge to arrive - so haven't played it yet, but plugged in the motor and noticed I could hear a pulsing sound from the motor - about 240 pulses per min. I'm worried that this acoustic/mechanical vibration will be picked up by the stylus and muddy/pollute the sound.

Is this noise normal for the P3? My ~25+ year old Yamaha P-520 direct drive TT is dead quiet by comparison. I was expecting the P3 to be a major upgrade but this motor noise has me concerned.

Thanks,
Mark