RX SCPC Errors

Hello Satcom experts....

I am looking for some pointers. I currently have a 1.2m dish that is getting rx scpc errors throughout the day. It comes and goes sometimes. I believe that it is local interference because neither of the other terminals experience this.  Any suggestions on what might be the issue?

I'd like to add that the sat engineer installed a pass band filter and it didn't help and he also put a spec anny onto the system and could not see any interference.

My dish is a Patriot systems
My modem is a Idirect 3000 series.

Any help would be greatly appreciated

Thanks Mike...

I had the NOC do that and they can see the errors increase until the system becomes unreliable and then decrease to the point that there are no errors at all on the rx side. They also verified that it the errors are not in the "net" and just local to me. I guess my next question would be, how do I pinpoint the interference? After that what steps should I take  so we can pass reliable data again?

Thanks