User guide

Appendix D - ECM Migration D-7
Migration Procedure
Example: The recommended settings for 64 kbps, QPSK, 3/4
• Guardband—60 msec
• Preamble Length—300 msec
• Total Slot Count—10
Tip: A Vipersat calculator is available to optimize these settings. Contact a
Comtech Vipersat Networks representative for a copy of the latest
Vipersat ECM Calculator.
There is no Remote List for ECMv2 like there is for ECMv1. Therefore, there is
no need to enable the Remotes in the burst map, nor to set a desired dSCPC
switch rate.
With ECMv2, the Remote sites will switch out to dSCPC using the Minimum
Switch Rate Limit from the Inband Return Path settings, as shown in
figure D-4 below.
Figure D-4 Switch Rate Limits, InBand Return Path Settings Page