Comtech EF Data SLM-5650A Vipersat Parameter Editor - Manual (Page 28)

Vipersat
2-12 SLM-5650A Parameter Editor User Guide
Cycles per Map
This menu item, which appears for all Hub types except Dynamic Cycle and
GIR, displays the number of spin cycles that will occur between each broadcast
of the Burst Map by the Burst Controller to the Remotes. One cycle is the
amount of time it takes for all Remotes in a group to burst on the common chan-
nel. The burst map provides each Remote with its allocated bandwidth and posi-
tion in the cycle.
For Dynamic Cycle and GIR configurations, the number of cycles per map is
automatically set to 1 in order to ensure optimum performance for these Hub
types.
Slot Data Length
This setting specifies the Slot Data Length in milliseconds for the Remotes in
the group, and represents the amount of data that can be transmitted or received
in one spin of the STDMA cycle by each of the Remotes belonging to that
group. This is the amount of time that the Remote is provided to send data in the
cycle.
Depending on the Hub allocation type that is defined for the modem, the appear-
ance of this setting will vary and may be comprised of one or two parameters:
• Fixed – Slot Length
• Dynamic Slot – Slot Nominal, Slot Minimum
• Dynamic Cycle – Slot Minimum, Slot Maximum
• GIR – Slot Minimum
• Entry Channel – Slot Length, Slot Maximum
Group ID
This field appears for Hub and Remote modems.
The STDMA Group ID number defines a group of equipment which will
respond to the output of the Burst Controller. This group is addressable within a
network which, in turn, is defined by the network ID number assigned to the
SLM-5650A.
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.