Yes, that's correct. I mean the output produced by Servo.write() when I say PWM.
Thanks for taking the time to write all that up. To be more accurate though, Servos (and ESCs) use PPM, Pulse Position Modulation, not PWM.
some posts suggest that don't connect red signal (5V) wire of esc to arduino.what should i do now ??
am asking about that red wire which is in red circle in photoand my question above mention should esc emit beeps when connect to battery or not ??