Last week I treated myself to a digital upgrade and picked up the ARC Pro Platinum GT set.
Everything works pretty much as expected in digital mode but there was an unexpected issue when switched to analogue mode and tried to use my analogue cars.
Everything functions fine but the cars emit a high pitched whine when powered. I've measured the noise frequency at 3919Hz. I've tried four unchipped cars and they all exhibit this behaviour. Although it works, it's pretty much unusable in analogue mode due to the noise. In digital mode the chipped cars are near silent - just the usual tyre and motor noises.
Digital car in digital mode = silent
Digital car in analogue mode = 3919Hz
Analogue car in analogue mode = 3919Hz
- Is this normal?
- Have I set something up wrong?
- Have I a dud power unit?