# Spektrum transmitter binds, but RC signals not appearing

Source: https://forum.modalai.com/topic/243/spektrum-transmitter-binds-but-rc-signals-not-appearing
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2021-05-14 20:13:29 UTC by mvxl500
Replies: 2 · Views: 620

## mvxl500 · 2021-05-14 20:13:29 UTC

I'm going through the initial setup of the VOXL m500 and am having trouble configuring the RC transmitter. I am using a Spektrum DX9. After configuring the IP address in the conf file and connecting to the m500 over QGroundControl, I am able to put the receiver into bind mode. After successfully binding, I can move the sticks but QGroundControl does not show any response from the channels. When I attempt to calibrate the RC channels I get an error saying zero channels detected. Does anyone have any ideas where I am going wrong?

## Reply by Chad Sweet (ModalAI staff) · 2021-05-23 03:24:36 UTC

The spektrum pairing should be identical to any PX4/Pixhawk pairing. Sometimes there is a final commit button that is missed when configuring in QGroundControl.

## Reply by modaltb (ModalAI staff) · 2021-05-24 15:30:54 UTC

@mvxl500 like Chad mentioned, typically with the PX4/QGC setup you have to power cycle PX4 after binding:

From: https://docs.modalai.com/configure-rc-radio/

![569470cd-1d23-44ba-8696-ab557b906e80-image.png](https://forum.modalai.com/assets/uploads/files/1621870241358-569470cd-1d23-44ba-8696-ab557b906e80-image.png)