Comtech EF Data CDD-56X Series Vipersat - Manual (Page 80)

Vipersat Configuration MN/22137, rev 1
3-46 Vipersat CDD-56X Series User Guide
DPC Enabled
The DPC Enabled command (enter E) is a toggle that allows the Dynamic
Power Control feature to be either Enabled or Disabled. The CDD-56X is
shipped with the DPC Enabled menu item turned off (Disabled) to allow
entrance link levels calibration during terminal setup.
Speed Up EbNo
Normally, the DPC message is sent every 60 seconds from each terminal in the
network. If the current E
b
/N
o
value of the terminal drops below the Speed Up
EbNo set value, the corresponding terminal increases its message send rate to
every 15 seconds until the current value becomes greater than the set value. This
provides a loop speed up to rapidly regain link quality.
Enter Q at the command prompt in the DPC Configuration screen to access the
Speed Up EbNo dialog shown in figure 3-60. The default value for this parame-
ter is 5 dB.
Figure 3-60 Speed Up EbNo prompt
Target DPC Address
The Target DPC Address identifies the modem that is transmitting to this
CDD-56X Demod, and will be receiving the DPC messages that provide the
current E
b
/N
o
value for this Demod. Typically, all Remotes will specify the Hub
modem that is supplying the TDM outbound carrier.
For STDMA Remotes, the Outbound IP address is sent out via the Burst Map,
and the DPC Target for these Remotes is automatically mapped to that address.
The Target DPC Address command is used only for units that are Out-of-Band
and will be utilizing the DPC feature. For In-Band units, the target addresses are
handled automatically by the VMS.
To manually configure the target address for an Out-of-Band unit, enter the
number corresponding to the appropriate Demod (1, 2, 3, or 4) at the command
prompt to display the Target DPC Address dialog shown in figure 3-61.