Hi, I also had increased noise. Only in combination analog vs. Digital. I solved the problem of ground wire.
The problem usually is in the galvanic isolation transformer - ground
http://www.feki.hostuju.cz/imig/P_20160117_213334.jpg
Hello, for me it is also a problem ZZZZZZZZ ground. I solved using the connection between Ground relay (wrapping the antenna gave interconnect cable) and e-530th Absolute silence. :-)