Comtech EF Data Vipersat CDM-570 User Manual page 119

able to function and will disable itself, resulting in an error message that is
displayed in the CLI.
Under most circumstances, the system will be running at the Calibrated Data
Rate, at the Calibrated Nominal Power level. When the VMS sends a switch
command to the CDM, the modem will go to a different data rate, and will
calculate a nominal power level for the transmitter. Communication is estab-
lished, data starts to flow, and the modulator begins receiving DPC packets
from the demodulator and adjusting its transmit power level accordingly. When
changing its power, the CDM will calculate a scaled maximum power based on
its current data rate and certain other values in the home state. This calculated
maximum is what insures that the modulator is not transmitting with more
power than is necessary, thus preventing problems.
A p p e n d i x D y n a m i c P o w e r C o n t r o l
C - C-5