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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. For example:
timeslots may be assigned 1 - 2, 2 - 5, etc. but not 1 - 5, 2 - 2.
H.1 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.1.1 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.
•
It contributes to the Terrestrial Framing Mode selection process. Trying to select a
T1-type Drop Mode such as T1-ESF with the mod data rate set to 1920000 bps (a
valid E1 D&I rate but not a valid T1 rate) will result in the error message 'INVALID
DROP MODE' and the selection will not be allowed. Trying to select a T1 type Insert
TM118 – Rev. 1.1
Map
Copy
TX ACTIVE > TX EDIT
Map
Copy
RX ACTIVE > RX EDIT
Appendix H
H
-9
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