MCS2000 Noise/interference

[aschenavar]

Hi all, I recently wired up a control box for led lighting on a brush truck and an MCS2000 and am now getting some interference on the RX end of the radio. It's not being TX out to dispatch, just audible on the RX end, if the lights get turned off, no more noise. Just curious if an inline filter would help, and which direction I need to be looking, I am not very familiar with Motorola stuff.

Thanks

 

[mmckenna]

Some LED lights are noisy and will cause this.

A couple of things you can try:
1. Power the radio off a completely separate battery or power supply from the LED lights and see if the noise goes away. This would indicate that the noise is getting in via the power feed.

2. Disconnect the antenna and see if the noise goes away. This would indicate the noise is getting in via the antenna.

If the noise is getting in via the power feed, then you need to look at how you are powering your radio and LEDS. Your radio power should come straight from the battery, and be separate from the lighting circuits.

Power feed and coax for the radio needs to be physically separated from the LED power feeds.

If the noise is coming in via the antenna, make sure the antenna and LED's are well separated and wiring is not running close together.

Some cheap LED's are just noisy, and you might need to replace them.
Power filters may hide the issue, but it's a better approach to fix it.