[BC] STL antenna mounting

[radioranger]

I'm working on a project to mount an FM transmit antenna and an STL receive
antenna on an existing tower, probably on the same leg. Given the path
geometry it's necessary to mount the STL receive antenna as high up the
tower as possible, but I want to avoid desensing the receiver with FM
energy.  The STL system is a Moseley Starlink, and I've been reading
comments here and have some personal experience with AM noise generated by
various sources wreaking havoc on digital STL signals.  I know this is
subjective, but how close would you mount an STL dish next to an FM array?

Steve Brown
Radio Rangers
Minneapolis,MN