A W-CDMA mobile terminal test system which include RF TX-IC, RX-IC and baseband modem is evaluated on 3GPP TS34.121. Section 5 & 6. The receiver architecture is direct conversion and the transmitter architecture is 2-stepup conversion. The test system achieves adjacent channel leakage power of 41dBc (Spec. >33 dBc), modulation accuracy of <17.5% (Spec. <17.5 %), reference sensitivity of -118.3 dBm (Spec. <-117 dBm), and blocking characteristics of -117.8 dBm (Spec. <-114 dBm). Those performance is suitable for W-CDMA mobile phone system.