Author: Malone, R.
Paper Title Page
MOPC166 Low RF Control Feedback and IQ Vector Modulator Compensation Functions 472
 
  • M.G. Fedurin, R. Malone, V. Yakimenko
    BNL, Upton, Long Island, New York, USA
 
  IQ vector modulator is key element of the gun and linac RF control circuits at Accelerator Test Facility at Brookhaven National Laboratory. IQ modulator calibration procedure was developed to find proper compensation functions in the conversion algorithm to minimize phase-amplitude coupling and setting-reading errors: rms(Aset - Aread )= 0.03dB, rms(Phiset - Phiread) = 0.3 deg. Since stabilization of the RF phase and amplitude is become critical for many experiments the slow feedback was developed and applied as well to significantly compensate drifts in RF system.