I have purchased the AD9959EVB.
i started to test his max output power when our work mode is single tone in 200MHz with full scale output.
we expected to get around the +5dBm (chip's DAC current is 10mA with an impedance of 50 ohm + some adapters and cable loss)
what we see in reality is around -6 to -7 dBm.
we checked and the Rset is 1.91Kohm, we simulated the on board low pass filter and it shouldn't give more then 1-2 dB attenuation
we checked the cables and setup with another reference and it seems accurate (1 dB difference)
below you can see 100MHz maximum power in spectrum and below it the right side is a 10 MHz signal in maximum power measured in a scope
can somebody help?