Configuring The Modem For Drop And Insert; Data Rate - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
To View the current Timeslot Assignment:
1. If there is a question of the channels not being entered properly, the Mapping Menu may
be used to see how the channels/timeslots are configured in the modem.
2. Use <ENTER> and the Arrow Keys to make the mapping menu read (for the Tx Side):
3. Press <ENTER>. The modem has now copied the current Tx Settings to the Tx
Channel/Timeslot Display.
4. For the Rx Side:
5. Press <ENTER>. The modem has now copied the current Rx Settings to the Rx
Channel/Timeslot display ).
It is not mandatory to assign timeslots in sequential order, although the
lowest timeslot must be entered in the lowest channel.
timeslots may be assigned 1 - 2, 2 - 5, etc. but not 1 - 5, 2 - 2.
H.2

Configuring the Modem for Drop and Insert

Several dependencies exist when configuring the modem for Drop and Insert (D&I). The
following paragraphs explain these dependencies and provide the user with the information
required to ensure smooth transition into D&I and to minimize the potential impact of these
dependencies.
H.2.1 Data Rate
Data Rate affects the Drop and Insert function in the following ways:
•
It determines the number of Satellite Channels that will be displayed in the Edit Maps.
•
It contributes to the Operational Mode selection process. Trying to change the Operational
Mode to D&I when a data rate is not set to a valid D&I rate will result in the error message
'INVALID DATA RATE,' and the mode change will not be allowed.
MN-DMD50– Revision 3
Map Copy
TX ACTIVE > TX EDIT
Map Copy
RX ACTIVE > RX EDIT
Drop and Insert (D&I)
For example:
H–8