Julew
Member level 1

Hello!
To measure the S11 of a LNA, manufacturer says that the generator output power of VNA has to be -30dBm so I can´t configure the attenuator of VNA so i bought an external one (20dB). Today i try to measure S11 but i can´t calibrate the equipment with the attenuator (if i do this, when i connect load/oc/sc it goes crazy!) (i attach load pictures) and if i attach it after calibration S11 of the attenuator is taken into account and the measure is not valid. How can make this measurement?
To measure the S11 of a LNA, manufacturer says that the generator output power of VNA has to be -30dBm so I can´t configure the attenuator of VNA so i bought an external one (20dB). Today i try to measure S11 but i can´t calibrate the equipment with the attenuator (if i do this, when i connect load/oc/sc it goes crazy!) (i attach load pictures) and if i attach it after calibration S11 of the attenuator is taken into account and the measure is not valid. How can make this measurement?