Stdma Power Hunt; Hitless Switching; Vms Registration And Managing Address; Udp Port Base Address - Comtech EF Data Vipersat 564L User Manual

P r o d u c t D e s c r i p t io n
multi-command message configuration (i.e., bit rate, modulation, FEC) look-up
per BER table and used to modify the tatget E /N to sustain an acceptable bit
b o
performance over all possible waveform configurations.
Delta Rain Fade Power Compensation
DPC offsets in modem power that are necessary during rain fade conditions are
now applied to incoming switch commands from the VMS. This prevents possi-
ble link failures due to power value changes associated with these switch
commands.

STDMA Power Hunt

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.

Hitless Switching

Data outages can occur during transitional switching in the satellite network.
New hitless switching parameters allow for fine tuning the switching process to
account for satellite propagation delay, command processing, and demodulator
re-acquisition.

VMS Registration and Managing Address

The 1.5.4 release introduces new methods for handling the managing address
and modem registration with the VMS. Unless a modem is registered with a
VMS, traffic will not pass either LAN-to-SAT or SAT-to-LAN. Also, Remotes
now receive a periodic update message from the VMS for setting the managing
address. This new message will update any Remote unit that is a new arrival, is
incorrectly set, or following VMS change-overs (redundancy switched).

UDP Port Base Address

It is now possible to change the assigned UDP base port address when an appli-
cation conflicts with the default address.

Auto Home State Failsafe

A revert flag can now be added to the burst map on a per remote basis. This
provides a more reliable means of forcing a Remote—stuck in SCPC mode, for
example—that fails to respond to a standard VMS revert command to return to
the home state. As soon as the Remote sees the flag, it will transition from
SCPC mode to STDMA mode and send an acknowledgement to the burst
controller.
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