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Ingress Issues

We are running into a carrier at 158.75MHz that when we modulate it to AM/FM, it has strange tones and squelches.  It was tracked to a car dealership and measured at +38dBmv.  It also drops to -38db at times and them comes back.  CLI has been done in the area with gear set at 121.2625/ch14 75' with no leaks.  Amps and node internals have been changed and respliced, some with new housings.  TDR'ed several feeder and trunk runs.  It kills ch20.  I mean gone.  What could this be?  I don't think it is marine but I could be wrong.  Can we involve FCC in these matters?  The plant is in good shape running 875/625 22db C-COR 1G 900 series with Motorola SG4000 nodes.  If there is anything you think you would do, we have done it.  I don't think we can keep this out of the plant and need to have this signal shut down.  Any ideas?
This is CABL.com posting #349444. Tiny Link: cabl.co/mbC4m
There are 3 replies to this message
Re: Ingress Issues olyteddy 10/27/2012 1:37:32 PM
Re: Ingress Issues johnmc3 10/25/2012 8:18:08 PM
Re: Ingress Issues RF2Lite2RF 10/25/2012 8:15:14 PM