Comtech EF Data CDM-570/570L Vipersat - Manual (Page 96)

Vipersat Configuration
3-60 Vipersat CDM-570/570L User Guide
Enter Q at the command prompt in the DPC Configuration screen to display
the Speed Up EbNo dialog shown in figure 3-78. The default value for this
parameter is 5 dB.
Figure 3-78 Speed Up EbNo prompt
Target DPC Address
The Target DPC Address identifies the modem that is transmitting to this
CDM-570/570L, and will be receiving the DPC messages that provide the
current Eb/No value for this CDM-570/570L. Typically, all Remotes will spec-
ify the Hub modem that is supplying the TDM outbound. The Outbound IP
address is sent out to all STDMA Remotes 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 modems that are Out-of-
Band and will be utilizing the DPC feature. For In-Band modems, the target
addresses are handled automatically by the VMS.
To manually configure the target address for an Out-of-Band modem, enter 1 at
the command prompt. The Target DPC Address dialog shown in figure 3-79
will appear.
Figure 3-79 Target DPC Address prompt
The STDMA Burst Controller is not permitted to specify a DPC Target because
the demodulator is receiving multiple bursts very rapidly from all Remotes in
the group and is unable to utilize DPC to control the transmit power of the
Remote modems. However, the transmit power of the Burst Controller adjusts
to meet the target EbNo values for the Remotes in the group. These Remotes
and their status and EbNo values are displayed in the Vipersat Summary screen,
DPC details (see “Vipersat Summary” on page 3-67).