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LO Leakage

i have configured the AD9373 to 2GHz Frequency.

programed the TX/RX/Sniffer LOs. and configured as internal LO.

once the Device programed the LO leakage at the port is -36dBm.

i have gone to the Transmitter page on GUI and found when i change the attenuation to 10dB.

the Output noise goes down, but the LO power increased by 10dB.

 

do we need to calibrate the path every time we sett the attenuator?? i dint expected that the TX attenuator will change the LO leakage in opposite direction.

 

Please clarify............

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  • No need to calibrate each time TX attenuation is changed.

    Regarding LO power increase with attenuation we are not seeing this in our setup.

    Please check your measurements again.

    Also to get lower LO leakage please enable internal and external LOL calibration as explained in UG-992 page no - 271, figure 179

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  • No need to calibrate each time TX attenuation is changed.

    Regarding LO power increase with attenuation we are not seeing this in our setup.

    Please check your measurements again.

    Also to get lower LO leakage please enable internal and external LOL calibration as explained in UG-992 page no - 271, figure 179

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