HMC833 Output Signal Quality

Discussion created by semion_z on Jul 30, 2016
Latest reply on Aug 15, 2016 by dyoung1



I have designed the board which uses HMC833 as external LO for 2 AD9361 devices.

When I power up the board the the HMC833 there is a default signal @ ~2.33 GHz.

When I zoom in to the signal I see some harmonics around it as following:


After PLL.jpg

All this is before programming this PLL.

What can be the source for such harmonics?