The characteristics of a transmitter's ACLR for WCDMA

Effects of a driver's adjacent channel leakage ratio (ACLR) on the total ACLR have been tested in order to investigate the relationship between the ACLR of a driver and a DUT. The ACLR test results show that the degradation in ACLR is 4.1-4.5 dB when the both ACLR values are the same. If the difference of ACLR values between a source and a DUT is 12-12.5 dB, then there is no degradation in total ACLR.