The purpose of this calibration is to optimally set gain adjust DAC on the output boards for optimal performance in the bypass mode of operation. The gain adjust DAC on the output board is used to control the RF power level that is incident upon the switched filters and subsequent RF amplifiers. This is accomplished by setting the control point for the gain adjust modulator. The goal of this calibration is to have sufficient power available at the amplifiers so that the available UUT output power is enough to minimize phase noise while controlling the harmonics when in the bypass mode of operation.
Equipment: None