Comtech EF Data SLM-5650A Vipersat Parameter Editor - Manual (Page 30)

Vipersat
2-14 SLM-5650A Parameter Editor User Guide
signal lock to occur before data is sent, thus preventing data loss. Higher data
rates allow for a shorter preamble, since it is easier to achieve signal lock.
The setting for this parameter (default = 0) should be obtained using the Viper-
sat STDMA Calculator—a free tool available from Vipersat Customer Support.
Burst Map Multicast IP Address
This field appears for Hub and Remote modems.
This field is used to define the IP Address for the Burstmap Multicast that is
sent out by the STDMA Burst Controller at the Hub to all of the associated
Remotes in that group. This address must be the same for all members of the
group. The burstmap is a proprietary message sent from the Hub to all Remotes,
at regular intervals, specifying the relative start time and duration for each
terminal to transmit.
Outbound IP Address for DPC
This field appears for Hub modem only.
This field, which appears for all Hub configurations, defines the current
Outbound IP Address. This identifies the Hub device that is supplying the
TDM outbound to the satellite. Specifying this address is necessary when
configuring a Hub that utilizes a Burst Controller that is a separate device from
the TDM modem.
This address must always be defined when the DPC feature is to be used,
whether or not the BC and TDM are separate devices. The Outbound IP address
will be the same as the Burst Controller IP address when the Burst Controller
and the TDM modem are the same device.
Remote List
This menu item appears under STDMA when the Unit Role is Hub, and is used
to define and make modifications to the Remotes that belong to the STDMA
group for the Hub Burst Controller.
Click the Add button to add a new Remote(s) to the list for this Burst Control-
ler. Define the IP Address, Name, and switching policies for the Remote.
An example for an ECM Hub is shown in figure 2-8 and figure 2-9. Enter the
SCPC Data Rate and the Switch Type to determine when the Remote will
switch and the desired starting point for communications. Note that a Data Rate
value of 0 will prevent the Remote from switching out of STDMA mode and
into SCPC mode.