Slot Guardband; Slot Preamble Length; Figure 3-12 Cycles Per Burst Map Prompt; Figure 3-13 Slot Guardband Prompt - Comtech EF Data Vipersat CDD-562L User Manual

Slot Guardband

This menu item, which appears for all Hub configurations, displays the current
length of the Slot Guardband in milliseconds and in bytes for the remotes in the
group. The Slot Guardband is the amount of time between the point when one
remote completes transmitting data and the point when the next remote in the
cycle begins transmitting. This prevents the remote from overrunning the next
terminal in the cycle. A typical setting for this parameter is 15 milliseconds
(ms).
This value can be modified by entering a G at the command prompt to display
the dialog shown in figure 3-13 and entering a new value.
Note: Note that the value entered at the command line in figure 3-13 is in milli-
NOTE

Slot Preamble Length

This menu item, which appears in all Hub configurations, displays the current
Slot Preamble size in milliseconds and bytes for the remotes in the group. The
Slot Preamble is the period between when the remote begins to transmit (sends
an ACK) to the Hub and when the first data packet is sent. This allows time for
signal lock to occur before data is sent, thus preventing data loss. Higher data
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 )
3 -
Figure 3-12
Figure 3-13
seconds. The corresponding value expressed in bytes is calculated by
the CDD-56X based on the STDMA transmit bit rate as shown in the
menu in figure 3-6.
Cycles per Burst Map prompt
Slot Guardband prompt
V i p e r s a t C o n f i g u r a t io n
3-15