453.350 interference in Cambria County?

[RedPenguin]

If anyone in Cambria County (preferably in the Johnstown area) types in 453.350 with NO PL in their scanner, do you get annoying static interference.

My BR330T has been doing this on this frequency no matter where I go in the county but my BCT15 doesn't seem to really do it.

My BR330T never seemed to do this before and never had issues on 453.350 before.

 

[druhe]

Control Channel

If anyone in Cambria County (preferably in the Johnstown area) types in 453.350 with NO PL in their scanner, do you get annoying static interference.

My BR330T has been doing this on this frequency no matter where I go in the county but my BCT15 doesn't seem to really do it.

My BR330T never seemed to do this before and never had issues on 453.350 before.

It's a control channel on 453.3375. Appears to belong to CamTran

ULS License - Public Safety Pool, Conventional License - WQIG372 - CAMBRIA COUNTY TRANSIT AUTHORITY

 

[RedPenguin]

Oh, forgot the frequencies were so close.

It's a control channel on 453.3375. Appears to belong to CamTran

ULS License - Public Safety Pool, Conventional License - WQIG372 - CAMBRIA COUNTY TRANSIT AUTHORITY

Oh, yea, forgot their GPS channel was so close.

Odd how my BCT15 ignores it but the BR330T constantly receives it.

 

[druhe]

Try this

Oh, yea, forgot their GPS channel was so close.

Odd how my BCT15 ignores it but the BR330T constantly receives it.

If you're not using PL on the 330 try using the attenuator. Should knock it out.

 

[RedPenguin]

Well....

If you're not using PL on the 330 try using the attenuator. Should knock it out.

Well I switched to using PL but as I started in my other thread, I get a strange noise at the end after they unmic, like a bzzz sound.

http://adam.250free.com/weird-noise2.wav

 

[druhe]

, I get a strange noise at the end after they unmic, like a bzzz sound.

http://adam.250free.com/weird-noise2.wav

For some reason I am not able to open your audio file. From what you describe it sounds like the buzzing sound you are hearing is due a slight time lag for the PL decoder to activate. Once again try using the attenuator. I don't think you will notice any degradation to signals being received due to your proximity to the transmitter site.

 

[fineshot1]

Well I switched to using PL but as I started in my other thread, I get a strange noise at the end after they unmic, like a bzzz sound.

http://adam.250free.com/weird-noise2.wav

If they are using motorola equipment that may be the PL "reverse burst" feature
that works between motorola radio equipment.

 

[RedPenguin]

Well...

If they are using motorola equipment that may be the PL "reverse burst" feature
that works between motorola radio equipment.

That may be it, but I am not sure why I don't get it on any other channel and I don't seem to hear it when I am not recording though I will have to test again to make sure.

The only problem I have now is, when no channel is being received and all I am doing is listening and recording, you hear a humm or something similar.

I will post a sound example later but the site I normally post things to, seems to be down.

 

[fineshot1]

If they are using motorola equipment that may be the PL "reverse burst" feature
that works between motorola radio equipment.

or

The receiver you are using does not have a fast enough acting ctcss squelch threshold and you are getting a brief burst of the 3375 adjacent control channel noise before the ctcss squelch kicks in.

 

[RedPenguin]

I see....

or

The receiver you are using does not have a fast enough acting ctcss squelch threshold and you are getting a brief burst of the 3375 adjacent control channel noise before the ctcss squelch kicks in.

Well, I guess if that is the case, then I'm pretty much going to have to deal with it?

Like I said, I am totally confused as to why it even picked up 3375 at all. I mean, my BCT15 doesn't with no PL and even my mother's old Reagancy 45-Channel (Pro-45 I believe) doesn't even have a problem and it can't even do CTCSS at all.

EDIT: NVM, I guess it actually is not my BR330T after all with the trailing noise. I got a great chance to listen to one of their own radios today, and I noticed how they actually receive the same noise. What's weird though is, it doesn't happen after every unmic.

For example, dispatch may talk, (noise), then a driver (noise), then another driver (no noise), then dispatch (no noise), then another driver (no noise), dispatch (no noise).

What I am trying to show in my example is, the noise seems randomly and even if it happens after one user, they may not get it the next time they speak. Is this repeater behavior then probably? Or is it reverse squelch, so that when the repeater or radios believe no one else is talking, close the squelch? Usually the noise is after no one immediately talks after that user. Odd how my BCT15 doesn't make a huge deal with this noise.