The LMX on our board and with the Eval board is not putting out the expected output power. Because this is happening on two different boards, I am suspecting that there is something common to our programming file(s) that is somehow limiting the output power. On our board we are utilizing the inductor pullup, and as such expect more power at the output.
If I may upload an example file that is giving about +0.5 dBm
Hi Noel,
The pullup is 1 nH inductor with 0.3pF caps, and the output stage goes to the next stage fixed attenuator YAT-3A.
For the measurements, there is a SMP connector that is enabled by rotating a capacitor. It is here that the measurement is made direct to the spectrum analyzer. The cable loss has been measured at 15.111 GHz ~ -4.59 dBm, and the spectrum analyzer reads -4.15 dBm.
From this I am figuring about 0.44 dBm for the output.
Same is true for another frequency right below the doubler, 14.888 GHz. It is also measuring ~ -0.28 dBm which would be significantly less than expected.
