If the Receiver you get is P6F, please don't worry, P6F is the upgraded version of X6F.
Servo Mode Setting (for P6F Receiver)
Press the binding button 4 times quickly, and the servo signal output by the P6F receiver will switch between the digital servo and the analog servo. When the servo signal output by the receiver is inconsistent with the model of the servo, the servo will make a "squeaking" sound, vibrate and be accompanied by heat generation. At this time, it is necessary to switch to the correct servo mode.