Comtech EF Data SDM-650B - Manual (Page 316)

Trojan Interface SDM-650B Satellite Modem
G–20 Rev. 5
G.6.4.1.3 Modulator Rate
The modulator has four symbol rate filters. Each filter is for a specific symbol rate. The data
rate and coder 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. If a filter is not physically present in the system, it
may be assigned N/A (not assigned).
Additionally, filters which are factory programmed may not be remotely programmed, and
will return the “error 5” message when a programming command is issued.
Modulators with the variable rate option installed may have four preprogrammed rates
available by using the filter rate assignment commands. These rates are selected using the
standard “SMRx_” commands. Modems that have the variable rate option installed will
also respond to the special “SMRV_” command.
G.6.4.1.3.1 Modulator Filter Rate Assignment
Command:
Response: >add/AMRx_nnn_mmmm.m”cr””lf”]
Status Only: Response:
>add/AMRx_nnn_mmmm.m”cr””lf”]
Where:
x = A, B, C, or D (Filter designator).
nnn = 1/2, 3/4, 7/8, or BP12 (Coder rate).
mmmm.m = 9.6 to 4080.0 (Data rate).
Note: The parameters “nnn_mmmm.m”may be replaced by "N/A” to indicate “no
assignment.”
Example:
Command:
Response: >add/AMRx_N/A”cr””lf”]