SNAU293 May 2024 LMX1860-SEP
All CLKOUT connections are AC-coupled at the LMX1860-SEP EVM and can be connected directly to RF instruments with 0VDC requirements; an additional DC block is not required. The unused CLKOUT SMA connector must be terminated with a 50Ω load, or a differential connection can be used if a balun with the best frequency range is available.
Recommended oscilloscope connections include one CLKOUT and one SYSREF output from the same channel, as well as the one LOGICLK and one LOGISYS output.
Other unused CLKOUT SMA connectors must be terminated with 50Ω single-ended or 100Ω differential load, or alternately must be disabled in software, to minimize unterminated output effects on performance.