Custom Operation; Table 5-2. Comtech Efd Closed Network Parameter Settings - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Modem Types
Parameter
Modem Type
TX Data/Code Rate
TX-IF Output
RX Data/Code Rate
TX Clock Source
Buffer Clock Source
Modulator Type
Encoder Type
Demodulator type
Decoder Type
TX Overhead Type
RX Overhead Type
Interface Type
Buffer Program
RTS TX-IF Cntrl
CTS Delay
5.2

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 Custom modem type, which allows Access to the modulator and
2. 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.
Table 5-2 . Comtech EFD Closed Network Parameter Settings
Front Panel Setting
EFD
TX-V, QPSK 1/2
ON
RX-V, QPSK 1/2
TX Terrestrial
Satellite Clock
Comtech EF Data Closed (All
modulator types are accessible)
Viterbi or Sequential
Comtech EF Data Closed (All
modulator types are accessible)
Viterbi or Sequential
None
None
EIA-422, EIA-232, V.35
Bits or Milliseconds
OFF or ON
0 Seconds
demodulator overhead type.
Reference Menu
Utility: Modem Type
Configuration: Modulator
Configuration: Modulator
Configuration: Demodulator
Configuration: Interface
Configuration: Interface
Utility: Modulator
Utility : Modulator
Utility: Demodulator
Utility: Demodulator
Utility: Interface
Utility: Interface
Utility : Interface
Utility : Interface
Utility: Interface
Utility: Interface
5–3
Revision 1
MN/SNM1001L.IOM