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DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
3.10.2 Mode
The operational mode of the modem often determines which additional menus and displays are
available for use by the operator. The D&I mode-specific menus will not be displayed unless the
operational mode of the modem is set to D&I. Therefore, the next step in configuring the modem
should be to set the operational mode to D&I. At this point, the D&I specific menus in the
Interface section will become available and will remain available until the operational mode of the
modem is changed to something other than D&I. When the operational mode is changed to
something other than D&I, the D&I specific menus will automatically disappear.
Mode affects the Drop & Insert function by affecting the Data Rate in the following manner:
1.
In Closed Net mode, any valid IDR, IBS, or Drop & Insert data rate may be entered.
2.
In Drop & Insert Mode, only valid D&I data rates may be entered.
The entry of an invalid rate will result in the error message 'DATA RATE OUT OF BOUNDS.'
3.10.3 Data Rate
Data Rate also affects the Drop and Insert function in the following ways:
1.
It determines the number of Satellite Channels that will be displayed in the Edit Maps.
2.
It contributes to the operational mode selection process. Trying to change the operational
mode to Drop & Insert when a data rate is not set to a valid D&I rate will result in the error
message 'DATA RATE OUT OF BOUNDS.' The mode change will not be allowed.
3.
Once Drop & Insert mode has been selected, trying to change the data rate to something
other than another valid D&I data rate will result in the error message 'DATA RATE OUT
OF BOUNDS.' The change will not be allowed.
The Mod Data Rate should be set according to the number of timeslots to be dropped, and the
Demod Data Rate should be set according to the number of timeslots to be inserted. The
following table gives the allowable D&I data rates based on the number of slots (n) to be dropped
or inserted.
TM065 - Rev. 3.3
Operation
3-9
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