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AD9364 transit power low than expected

Question asked by sotonzi on Mar 25, 2015
Latest reply on Mar 25, 2015 by sotonzi

Hi Everyone,

 

I'm using AD9364 on the Zynq board, using the no-os driver. When I am doing the transmitter performance test, I measure the signal power with different carrier frequency, using attenuation of 0dB. However the measured power (peak) is no higher than 4dB and dropped below 0dBm to around -12dBm from around 2.7GHz onwards. I am using the same settings as in the example code and use SPI write (ad9361_set_tx_lo_freq) to change the frequency. The measured power is far more less than the expected (according to the datasheet, ie 8dBm for 800MHz). Any clue?

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