Some noise can be generated on the signal emitted by the ProxiLAB. This noise can be removed by switching from RF.VNA Modulator output to AWG Modulator output, then coming back to the initial position. If it's still noisy, please follow that procedure:
*Open RGPA and select RF.VNA
*Click on "Default" (settings / General tab of RGPA)
*Turn off the ProxiLAB
*Verify that no "ProxiLAB.exe" process is running
*Turn on the ProxiLAB
This solution is a temporary work-around.