diff --git a/Variant-PPM.md b/Variant-PPM.md
index bfa4f2a..c028cfb 100644
--- a/Variant-PPM.md
+++ b/Variant-PPM.md
@@ -22,4 +22,5 @@ If the board is [beeping](https://github.com/EmanuelFeru/hoverboard-firmware-hac
 * Make sure you enabled PPM on your transmitter
 * Make sure you use the PPM port on your receiver
 * Make sure you are using the sensor cable(left or right) selected in config.h
+* PPM is highly prone to noise, keep cables short, use shielded cable, use ferrites, stabilize voltage
 * On some boards the wire colors might differ, try the blue wire
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