Loading ...
Sorry, an error occurred while loading the content.
 

Update on Opera 16Khz 'Optical' (ROS Data mode)

Expand Messages
  • graham787
    Update on Opera 16Khz (ROS Data mode) Tx/Rx path design notes Its noted that linearity may be a problem with Tx drive and Rx , use being made
    Message 1 of 1 , Dec 2, 2012
      Update on Opera 16Khz (ROS Data mode)

      Tx/Rx path design notes

      Its noted that linearity may be a problem with Tx drive and Rx , use being made of the `Q' of RF path components to restore envelope shape.

      Please note , that both the Opera 16K and base band 1.5 KHz systems will function quite normally with a non linear recovered signal , A square wave is quite sufficient , there being no need for pre filtering of the recovered signal , the DSP engine will perform this task un aided.

      If harmonic radiation is not a problem with optical transmission , this may simplify the driver design to a `simple' on/off switch functioning at the audio drive frequency , minimising requirements for Opera Beacon or ROS-Data transmitter

      A 16 Khz version of the ROS-Data mode could be coded if data transmission is of interest. ROS data modem is MFSK phase continuous and is suited to non-liner systems.
    Your message has been successfully submitted and would be delivered to recipients shortly.