Stdma Power Hunt; Low Data Rate Fast Acquisition; Figure 3-10 Group Id Prompt - Comtech EF Data Vipersat 564L User Manual

V i p e r s a t C o n f i g u r a t io n
Allocation of bandwidth is shared among the remotes in an STDMA group.
Depending on the number of remotes in a network, a Hub may have multiple
burst controllers, each with its own set of remotes. This is accomplished by
assigning a unique Group ID number to each controller and its associated
remotes.
Note: The STDMA Group ID number and the Network ID number are indepen-
NOTE
dent. There can be multiple STDMA groups within a single network.
The target CDD-56X Group ID can be modified by entering an I at the
command prompt to display the dialog shown in figure 3-10.
Figure 3-10
Group ID prompt

STDMA Power Hunt

This menu item appears for Remote modems only.
Should link reception from a Remote be incorrect or impaired (e.g., poor envi-
ronmental conditions), the STDMA Power Hunt feature is an option on the
Remote modem that automatically adjusts the Remote transmit power to ensure
that burst map acknowledgements from that unit are received by the Hub burst
controller. When enabled, the burst controller sets a flag in the burst map that
indicates it is not receiving acknowledgements from an enabled Remote. When
the Remote receives the burst map, it will see the flag and automatically
increase power by 3 dB above the default or Home State setting. If this closes
the link, the burst controller will clear the flag. Note that if the 3 dB increase is
more than is necessary, DPC will make a down adjustment to the appropriate
level and this adjustment will be added to the DPC Offset.
This feature option is Enabled/Disabled by entering H at the command prompt.

Low Data Rate Fast Acquisition

This parameter is operator configurable only for units that are Hub with STDMA
(No Expansion). The menu item is a toggle used to Enable or Disable the Viper-
sat Burst Fast Acquisition Timing (BFAT) feature that functions at low data
rates (64 kbps to 256 kbps). This feature allows for significantly faster acquisi-
C h ap t e r U s i n g t h e C o m m a n d L in e I n t e r f a c e ( C L I )
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