Operating instructions

Operation DVB3030/DVB3030L Digital Video Broadcast Modulator
3-2 TM052 - Rev. 3.5
If Symbol mode is selected, the operation of the modem should be very similar to other Radyne
products. If the Symbol Rate is entered, the Data Rate is calculated from the newly entered
Symbol Rate, the Framing mode, the QAM mode and the Convolutional mode. If the Data Rate
is entered, then the Symbol Rate is calculated instead. If the Framing mode, the QAM mode or
the Convolutional mode is entered, the Data Rate is recalculated.
If Data mode is selected, the operation should reflect the desire to have Data Rate as the
primary variable. If the Data Rate is entered, the Symbol Rate is calculated from the newly
entered Data Rate, the Framing mode, the QAM mode and the Convolutional mode. If the
Symbol Rate is entered, then the Data Rate is calculated instead. If the Framing mode, the
QAM mode or the Convolutional mode is entered, the Symbol Rate is recalculated.
If Auto mode is selected, the modem remembers if Symbol Rate or Data Rate was the last
variable entered. For example, if the Data Rate was the last variable entered, then the operator
entered Framing mode, most likely the operator would not like the Data Rate to immediately
change to a new value. Instead, by remembering that the last rate variable entered was Data
Rate, the modem would automatically assume that the operator wishes the Symbol Rate to
change instead.