Interference

[Engine79-7]

I am receiving interference on a one-way listen-only analog frequency on a BTech DMR-6X2 Pro while sitting at my desk. It makes squelching noises intermittently and then just stops. This happens nowhere else so far.

Are there settings I can change to be able to sit on the channel without interference? Mind I cannot add any tone.

 

[KevinC]

I am receiving interference on a one-way listen-only analog frequency on a BTech DMR-6X2 Pro while sitting at my desk. It makes squelching noises intermittently and then just stops. This happens nowhere else so far.

Are there settings I can change to be able to sit on the channel without interference? Mind I cannot add any tone.

Without any sort on tone squelch the only suggestion I have is to move the radio. Or try to find the source and attempt to mitigate the noise emanating from it.

 

[MTS2000des]

Not to mention, these are low end radios based on cheap consumer grade SOCs which lack proper front end filtering. If you must run carrier squelch, consider a higher tier radio, doesn't have to be anything elaborate, a Kenwood TK-2180 would probably sit there all day long without issue. Try it and see.

 

[jaspence]

The BTech 6x2 is not a low end radio in the DMR ham field. I do not understand why he can't add a tone, because the 6x2 is second only to my professional single band radios.

 

[KevinC]

We're not going to debate the quality or lack thereof here. Just stop it right now.

 

[alcahuete]

Unfortunately, it is likely a filtering issue with the radio.

OP, if you can't add a code, and require CSQ, the only other thing that can be done is find the source of interference.

Is there anything at your desk or in the general area that might be causing the interference? Cheap wall wart adapters are known to spew RFI. LED lighting can be another source. I would check around and start unplugging things, especially if it is only happening in one area.

 

[popnokick]

Other RFI sources include computers, routers, Ethernet switches, Any devices using Ethernet, cable modems. Any of these on / near your desk?

 

[Ubbe]

I am receiving interference on a one-way listen-only analog frequency on a BTech DMR-6X2 Pro while sitting at my desk.

If you have another receiver or scanner, set it to that frequency with an open squelch or if you have a scanner set it to the smallest step size and set the squelch to open and tune around the frequency and you will probably find that there's a carrier somewhere there from an electronic device. Choose a wide bandwidth, not FM broadcast wide but FM instead of NFM.

I have a lot of interferencies that makes it impossible to use an antenna directly on a scanner. I have to use external antennas but then they tend to pickup my neighbours interferencies. My own biggest sources for FRI seems to be a satellite box, computer, network router and display screens/TV.

/Ubbe

 

[Reconrider]

Remove any speakers.
Remove any surge boxes that you have near it. Surge boxes are a big help in making RF

 

[ladn]

It might be worthwhile to try a different antenna. As previously mentioned, these radios don't have the most efficient front end filtering and perhaps a less efficient antenna, combined with a little higher squelch setting, may mitigate the interference.

The OP didn't mention which frequency band the problem channel is on. I'd first try an unfolded paper clip if for no better reason than it's a cheap first step.

 

[Engine79-7]

Thanks everyone! I have a switch next to my desk, huge copier and a desktop … so we’re sort of running an interference farm. I will investigate and see which is more likely to cause it.

Thank you!

 

[AF1UD]

Thanks everyone! I have a switch next to my desk, huge copier and a desktop … so we’re sort of running an interference farm. I will investigate and see which is more likely to cause it.

Thank you!

A little late to the party, but did you ever figure out what it was?

 

[kb5udf]

Have you considered adjusting the analog squelch? You may possibly be able to squelch out the noise and still receive the desired signal. Give it a try.

I would add that the same thing can happen with commercial radios (and does) when the ‘radio hash‘ is on the desired frequency.

 

[Engine79-7]

A little late to the party, but did you ever figure out what it was?

A wide variety of things considering its an IT desk