SixPackABS
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MAZDA CX5 owners are unfortunate to have BSM falsing being picked up by the R7 rear horn. The only work around I had just to be able to use the R7 was to have an R7/R3 combo. R7 with K band disabled and the R3 with Ka band disabled. So far I was not having falsing issues being triggered by one of the RD,,,,,,, I cannot say the same if there was no interference issue. As we all know there will be. I would have run my set-up permanently this way. I really don't like running the second RD, (R3). Until heaven sent a possible problem solver.
@hiddencam suggested a very nice idea. Attenuating the rear horn of the R7 to decrease/eliminate the BSM falsing from the CX5.
Initial Result.
K band 50%/ K fliter on/ K wide/ MRCD off. ( same setting pre attenuation mod)
After I powered it on the bsm falsing started. Just an initial beep , since the quite ride is on you would not hear anything. Bummer. Decided to take a ride downtown. As soon as the car started moving the falsing stopped. Stopping at a traffic light didn't trigger any falsing. As soon as I am parked falsing will start very briefly then quite ride kicks in. Very big difference from pre attenuation mod. Very much quite. Would keep this set-up if it holds up.
I need to run this tomorrow morning where in it much busier downtown.
6 WEEKS AFTER USING THIS MOD.
I have added 2 more layers a total of 4 layers of MAST on the rear horn.
Covered the left side of the rear horn close to the LED screen with 3 layers of MAST.
BSM filtering is superb, equall or greater than the RPM.
Final Look now.
@hiddencam suggested a very nice idea. Attenuating the rear horn of the R7 to decrease/eliminate the BSM falsing from the CX5.
A month after,,,,, here it is.If the rear BSM issue is the only reason you're doing this risky practise, why not just control the physical attenuation of the rear antenna by using a product like a (piece of) stick-on tuned frequency absorber. 65 bucks for a 12"x12" piece and you'd have enough for 12 R7s. You could recoup your cost by selling 1"x1" pieces for 6 bucks to other forum members experiencing your issue of too sensitive rear horn. That way, interference is fully eliminated. You'd get 20db attenuation, tuned only to K-band radar and not Ka band. The R7 is about -124dB in Hwy mode (a few dBs more sensitive than the R3 in the below chart), so that would bring it to -104dB in Hwy mode, and % reductions in Advanced mode much closer to what you're looking for.
Initial Result.
K band 50%/ K fliter on/ K wide/ MRCD off. ( same setting pre attenuation mod)
After I powered it on the bsm falsing started. Just an initial beep , since the quite ride is on you would not hear anything. Bummer. Decided to take a ride downtown. As soon as the car started moving the falsing stopped. Stopping at a traffic light didn't trigger any falsing. As soon as I am parked falsing will start very briefly then quite ride kicks in. Very big difference from pre attenuation mod. Very much quite. Would keep this set-up if it holds up.
I need to run this tomorrow morning where in it much busier downtown.
6 WEEKS AFTER USING THIS MOD.
I have added 2 more layers a total of 4 layers of MAST on the rear horn.
Covered the left side of the rear horn close to the LED screen with 3 layers of MAST.
BSM filtering is superb, equall or greater than the RPM.
Final Look now.
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