[TowerTalk] rigol dsa815 spectrum anaylzer and tuning duplexers

[Jamie WW3S]

Sorry if this is off topic, but am in need of some tutoring in properly 
using a DSA 815 spectrum analyzer to check our local clubs 440 repeater 
duplexer. The 815 has the tracking generator and we have a return loss 
bridge, but have never tried to check a duplexer with it.....please 
reply direct, any help would be appreciated.