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SARC Pro: Noise in Analogue mode

HowlinDawg

19 posts

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.

So;

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?

Andy P.

1557 posts


Community Moderator

Unfortunately this is normal in the current version of the app but might possibly be able to be changed in a future version.

I am an electronics dud but given the APP has complete control over the power curve it might be able to adjust the modulation to reduce the noise.

Keep watching this space...

HowlinDawg

19 posts

Thanks for the reply Andy.

Good to know that it's not a defective unit but a shame that this is the way it's intended to work. I intend chipping two of the cars to digital anyway when DPs aare back in stock so no biggie there.

However, I had hoped to leave the LMP cars analogue and maybe run some slot.it Le Mans and Gruppo C cars in analogue mode. I don't think I can tolerate that whine (and probably more importantly,  I don't think it'll be tolerated by others in the house) so I guess I'll have to investigate retro chipping the Slot.it cars that I want to run.

Andy P.

1557 posts


Community Moderator

Like I said.. wait a week or two.. things might change.

I just have a gut feeling things might change... :-)

HowlinDawg

19 posts

I can be patient. InnocentWill watch this space. 

Hello , I am new to this forum , and would like to  know if you have any updates in regards to the high pitch noise in ARC PRO- analogue mode  .  Thank you in advance for your help 

Andy P.

1557 posts


Community Moderator

It is part of the way the power is controlled in analog mode on the ARC PRO.

ARC AIR does not cause the same effect.

My subjective opinion is that pure analog cars don't do it as much as digitally chipped cars in analog mode (even though HowlinDawg measuered otherwise).

As soon as other sounds can be heard (radio, TV, the actual cars racing on the track) this should be drowned out.

It is also known that some are more sensitive to it than others.

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