Random phase 2nd trip echo testing

You can use the digital signal simulator (DSS) for testing random phase for 2nd trip echo recovery.

Random phase processing filters and recovers second trip echoes, which can be a serious problem when operating at high PRF. See RVP10 User Guide (M212604EN).

To use this feature, random phase features of the RVP must be licensed on your system.
  1. Verify that RVP non-volatile setup (under Mb) has digital phase locking enabled.

    See Sample Dspx session on the dspx utility chat mode.

  2. Select Plot Params > Spectrum Display.
  3. Select General Setup > Major Mode > Random Phase.
  4. Select General Setup > Type of Spectra > Raw #1.
  5. On the DSS panel, turn Digital Locking on (button in).
  6. On the DSS panel, set Second Trip off (button out).
  7. Use the DSS to configure Target #1 and Target #2.
  8. Set Second Trip on (button in) to put Target #2 in the second trip.
  9. To verify the stages of the algorithm, select General Setup > Type of Spectra > Raw #1, #2, and similar.
  10. Set up moment plots (Z, V, and so on versus range) to verify the moments.
  11. Trace the filtering steps of the random phase algorithm and experiment with different set-ups for the whitening filters.