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Hi,
I have a problem with XPIC link. The RSL levels of the V and H polarization are as calculated but the XPD is 16 dB. We tried the fine adjustment of antenna polarization but no effect. The system is with dual polarization antenna and coupler. When one H odu is muted we have -90 in the other H, but when V is muted we have -67dbm(probably noise from nearby working MW) in the other V. Can this noise be the reason for the low XPD?
If only one ODU is muted you are supposed to get planned RSL on the one opposite ODU and about planned RSL- XPD on the other opposite ODU.
In case both of ODUs are muted, you are supposed to get about -90 on the both oposite ODUs.
I didn't make my statement clear but in few words is it possible when we have noise in one of the polarizations to get worse bad XPD?
And whether it is possible to get XPD 16db only because of bad fine tuning and perfect RSL levels? My suggestion is not but I need another opinions.