Enable Dpc; Target Eb/No; Figure C-4 Dpc Dialog, Parameter Editor - Comtech EF Data Vipersat CDM-570 User Manual

C o nf i g ur a t i o n
changed from the CLI Calculate Max Power menu (figure C-5). The calculator
function is not available from the Parameter Editor because it does not contain
the information for the modem BER waterfall curves, which is vital to calculate
maximum power. Consequently, the Parameter Editor provides display-only
values for the maximum settings from when the parameter file was acquired
from the modem. Thus, this dialog (figure C-6) is labeled DPC Calibration
rather than Calculation.
Figure C-4
DPC dialog, Parameter Editor

Enable DPC

When implementing the DPC function, it is necessary to enable DPC for each
modem that will utilize this feature and any of the corresponding demodulator
devices that it may link with, as the function is a peer-to-peer protocol.

Target Eb/No

The Target Eb/No value is entered as defined in the site link budget calculations
and provides the desired signal strength for the DPC process, which is a closed
loop servomechanism. The modulator closed loop servomechanism relies on an
IP packet (message) that is generated by the corresponding receiving demodula-
tor (distant end), is sent every 30 seconds, and contains a processed E /N
b 0
C-10 V i p e r s a t C D M - 5 7 0 / 5 7 0 L U s e r G u i d e