Need to buy correct unit for needs

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Jamie Cline

Apr 6, 2022, 10:52:36 AMApr 6
to RF Explorer
Good Morning 

My name is Jamie. I am a garage door company owner in Wisconsin. We recently installed a liftmaster 84501 Residential garage door opener that uses a freq of 390MHz the handheld car remotes will only work from inside the garage, i sent my techs out and replaced the opener and same thing is happening i hooked up the initial unit in my shop and it works correctly, the house must have some RF interference. I am scheduled to go back this friday 4-8-22 to find a solution 

I ordered what I thought was the RF explorer spectrum analyzer but I purchased the signal generator.  Can you advise me on what unit would be the correct one to purchase 

these are the following freq the openers we deal with 
310 , 315, 318,390,
sometime 300

Any help with the correct recommendation on the unit to help find the source of the interference would be greatly appreciated

RF Explorer

Apr 6, 2022, 10:55:30 AMApr 6
to RF Explorer

You can use pretty much any RF Explorer model to work at these frequencies, the best option would be RF Explorer 4G Combo PLUS:

This model covers your frequency range of interest as well as provides advanced DSP.

RF Explorer Team

Jamie Cline

Apr 6, 2022, 12:55:53 PMApr 6
to RF Explorer
Thanks !!!

I ended up ordering the WSUB1G   240-960mhz  model would that work just as well for now as i needed a unit by friday 

Andrew Morris

Apr 6, 2022, 1:26:54 PMApr 6

Got any LED bulbs in the LIftmaster unit? Had similar problem and replaced those LED bulbs with incandescent bulbs and problem went away.


Liftmaster has list on their website of LED bulbs certified that won’t cause interference problems.


Andrew Morris


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Jamie Cline

Apr 6, 2022, 1:31:59 PMApr 6
to RF Explorer
this unit has the led built into them. techs removed the 1 led in the garage and the 3 on the exterior of the garage still had range issues. 

The led in the liftmaster openers was a crazy find a few years ago im glad they finally admitted they had some issues and made that list of approved bulbs 


Darryl VanNort

May 8, 2022, 1:54:29 PMMay 8
to RF Explorer
Should do the business for you.

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