Comtech EF Data SDM-650B Installation And Operation Manual page 295

SDM-650B Satellite Modem
Assign TX_Fltrs
Assign RX_Fltrs
Rev. 5
Asynchronous Overhead Channel Unit
Transmit filter display/assignment utility. Used to view current
filter rate assignments and to make filter rate reassignments.
The modulator has four symbol rate filters. Each filter is for a
specific symbol rate. The data rate and code rate for each
filter must be established upon initial modulator installation,
and when circumstances indicate the need to do so. Filters
are designated as A, B, C, and D. Press [ENTER] when the
Assign TX-Fltrs selection is displayed in the Utility Functions
menu to view the current filter assignments. On line 1 of the
display will be TXA, which indicates transmitter filter A.
Following TXA on line 1 will be the code rate (1/2, 3/4, or 7/8)
or N/A (not assigned). On line 2 will be the data rate assigned
to filter A. Use [ ← ] and [ → ] to see the assignments for filters B,
C, and D (TXB, TXC, and TXD). To change a filter
assignment, press [ENTER] when the data for that filter is
displayed. Use [ ← ] and [ →
parameter to be changed. Use [
parameter. When all changes are made, press [ENTER] to
confirm the assignment. Some filters may have parameters
preprogrammed in the filter board hardware. If the filter
parameters are preprogrammed, the previously described
programming techniques will be disabled.
Note: These assignments are used for the selection of TXR in
the Configuration Functions menu. The parameter N/A is used
to indicate that the specific filter is not present.
Receive filter display/assignment utility. Used to view current
filter rate assignments and to make filter rate reassignments.
The modulator has four symbol rate filters. Each filter is for a
specific symbol rate. The data rate and code rate for each
filter must be established upon initial modulator installation,
and when circumstances indicate the need to do so. Filters
are designated as A, B, C, and D. Press [ENTER] when the
Assign RX-Fltrs selection is displayed in the Utility Functions
menu to view the current filter assignments. On line 1 of the
display will be RXA, which indicates transmitter filter A.
Following RXA on line 1 will be the code rate (1/2, 3/4, or 7/8)
or N/A (not assigned). On line 2 will be the data rate assigned
to filter A. Use [ ← ] and [ → ] to see the assignments for filters B,
C, and D (RXB, RXC, and RXD). To change a filter
assignment, press [ENTER] when the data for that filter is
displayed. Use [ ← ] and [ →
parameter to be changed. Use [
parameter. When all changes are made, press [ENTER] to
confirm the assignment. Some filters may have parameters
preprogrammed in the filter board hardware. If the filter
parameters are preprogrammed, the previously described
programming techniques will be disabled.
] until the flashing cursor is at the
↑ ] and [ ↓ ] to change that
] until the flashing cursor is at the
] and [ ] to change that
↑ ↓
F–37