At present, designed two product:USB/RS232 and USB/RS422, selected ADI chips: LTM2881 & LTM2882,
SCH and PCB design are basically based on the recommended design of LTM2881 & LTM2882,
EMI prescan has been preliminarily carried out. It is preliminarily confirmed that RE (radiated emission) test is out of limits in 300MHz ~ 600MHz,
and may be closely related to ltm2881 & ltm2882 modules,If have any suggests?
Thanks for your supports~