No apparent decrease in throttle PWM value during failsafe testing

ArduPlane Plane 4.0
1

I’ve been setting up throttle fail safe according to the directions here: https://ardupilot.org/plane/docs/apms-failsafe-function.html. Failsafe seems to work fine according to the tests, however, I do not see a drop in the low ppm value when I turn off the transmitter. I should be seeing a drop below 982, but I am not apparently. Why would this be happening yet failsafe functions as expected?

Also, is it normal to have a slow beeping from the motor every few seconds while the plane is disarmed? On arming it stops, and all appears normal.

Thank you much.

2

I may have resolved the beeping ESC/motor issue. Can’t find where I read it now, but the slow motor beeping appears to be a notification that there is no valid PWM signal to the ESC. The beeping stops when armed.

Regarding throttle/radio failsafe, I am still unsure about why there is no reduction in the low throttle value when the transmitter is turned off. I’ve confirmed again in several tests that the failsafe does indeed trigger correctly.