How do I setup a repeater with an XTEND?

I have a point to point network in place now with one master unit with an XTEND and 8 slave untits with XTENDS. One of these units is behind a hill and is having trouble sending and receiving packets. I want to set a repeater up to resolve this issue on this one site. How do I do this?

just keep all the default settings expect DH, DL values
for repeater put DH=0,DL=FFFF don’t change the reaming modules settings