Hello,
I'm trying to use a LMX2581EVM and had a query regarding the output power level. The datasheet mentions that for an output frequency of 2.7GHz, an inductive pull up gives an output power varying from about 7dBm to 12dBm.
With RFoutA powered down using software, using RFoutB of the EVM, which has a 18nH inductive pull up, the output power for me varies from 3.7dBm to 9.5dBm. My concern is why the output power level is only 3.7dBm for a setting of 15 as OUT_PWRB. This is because, that setting gives be the best phase noise performance but not sufficient output power (7dBm would work for my application). What could be the reason for this and how can I improve it?
Additionally, what type (resistive/inductive) of pull up would be better in terms of the phase noise performance?
Awaiting a reply,
Thanks and Regards,
Ajay