diff --git a/Variant-PWM.md b/Variant-PWM.md
index d266366..7c54c2a 100644
--- a/Variant-PWM.md
+++ b/Variant-PWM.md
@@ -15,4 +15,5 @@ Proceed with [calibration](https://github.com/EmanuelFeru/hoverboard-firmware-ha
 
 ## Troubleshooting:
 If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hack-FOC/wiki/Diagnostics)
-* Make sure you are using the sensor cable(left or right) selected in config.h
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+* Make sure you are using the sensor cable(left or right) selected in config.h
+* PWM is highly prone to noise, keep cables short, use shielded cable, use ferrites, stabilize voltage
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