Question on In-channel selectivity test

Hi,

While going over the in-channel selectivity test case for LTE base station in 3GPP TS 36.141 (Ver 9.6.0) I am not able to understand the meaning of following paragraph (Section 7.4.4.2) despite my best efforts:

1) Adjust the signal generator for the wanted signal as specified in Table 7.4-1 for Wide Area BS, in Table 7.4-2 for Local Area BS and in Table 7.4-x for Home BS on one side of the FC.
2) Adjust the signal generator for the interfering signal as specified in Table 7.4-1 for Wide Area BS, in Table 7.4-2 for Local Area BS and in Table 7.4-x for Home BS at opposite side of the FC and adjacent to the wanted signal.

FC according to 3GPP spec represents Carrier Center Frequency. I am not clear what is meant by - adjusting wanted signal on one side of Fc and interfering signal on opposite side of FC. I would think that wanted signal should be centered at FC.

Any comments would be helpful.

Thanks...