Baseline Power; Dpc Offset; Sotm Offset; Set Home State Parameters - Comtech EF Data Vipersat CDM-570 User Manual

V i p e r s a t C o n f i g u r a t io n
and their status and EbNo values are displayed in the Vipersat Summary screen,
DPC details (see "Vipersat Summary" on page 3-59).

BaseLine Power

The BaseLine Power is an information only display, and is a function of the
power given to the modem by the VMS for the last switch command based on
link budget calculations. At boot up and prior to receiving a switch command,
this value will match the Nominal Power Level (Home State value). The given
modem power is the sum of the BaseLine Power and either the DPC Offset or
the SOTM Offset.
In SOTM mode, the BaseLine Power value is based on the modem being at the
center of the satellite beam.

DPC Offset

The DPC Offset is an information only display, and is a power value shared
between STDMA Power Hunt (when in STDMA mode) and DPC (when in
dSCPC mode with DPC enabled). For DPC, the offset is the power adjustment
made to account for changes in the environment (rain fade) or other factors in
order to maintain link connectivity. The resultant modem power is the sum of
the DPC Offset and the BaseLine Power.

SOTM Offset

The SOTM Offset is an information only display, and is only applied when
SOTM is enabled.
This value is a power adjustment received from the ROSS based on the current
location of the modem within the satellite footprint. This offset accounts for the
variation of power as the modem moves away from the center of the satellite
beam. The resultant modem power is the sum of the SOTM Offset and the Base-
Line Power.

Set Home State Parameters

A CDM-570/570L's Home State consists of those parameters which provide a
known RF configuration that the CDM-570/570L will return to, either as the
result of a command by the VMS, or as it comes back on line from a reset or a
power cycle. These Home State settings are typically selected so that the
CDM-570/570L goes to a configuration which is optimum for its function in the
network.
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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