This is a MPX stereo generator >40db separation. Audio filter 20hz-15Khz. With pll oscillator. New version with pic microcontroller for excellent stability. With stereo mono function. Excellent device for broadcast transmit or to make your rf generator to stereo for tests. standard is 50us if you want 75us please contact me. For other questions please contact me. For more details please download :rapidshare.com/files/228129330/stereo.pdf