Comtech EF Data SDM-300L - Manual (Page 73)

Operation SDM-300L Satellite Modem
3–32 Rev. 2
3.4 Custom Operation
Note: If the modem serves as the backup unit for a rack of modems having different
hardware and FAST options, then the backup modem shall have all of the features and
hardware found in the other modems.
Operating in Custom mode allows access to all front panels menus, including the Utility
menus. The Custom operation mode is mainly used when the modem must function with
no overhead in an open network application. For example, to use the modem in the IDR
mode of operation with overhead (IESS308-2), the following steps are taken:
1. Select the IDR modem type, so that the modem loads the IDR default parameter.
2. Select the Custom modem type, which allows Access to the modulator and
demodulator overhead type.
3. Select NONE for the overhead types.
A protection switch can make use of the Custom operation mode when the modem is
configured as a backup modem. Because the backup modem is operating in Custom
Mode, the switch can program all the backup modem parameters. Thus, the one backup
modem can be made compatible with all of the various application types found in the
rack.