Operation; Idr Operation; Table 3-4. Idr Parameter Settings - Comtech EF Data SDM-300A Installation And Operation Manual

SDM-300A Satellite Modem
3.4.2

Operation

3.4.2.1

IDR Operation

To operate the modem in the IDR configuration, the following cards must be installed in
the modem:
•
•
The IDR option is a FAST feature that must be enabled using the front panel and the
Utility Modem Type menu. Table 3-4 lists the parameters that are accessible once the
IDR modem type is enabled.
Parameter
Modem Type
TX Data/Code Rate
TX-IF Output
RX Data/Code Rate
TX Clock Source
Buffer Clock Source
TX Coding Format
RX Coding Format
Backward Alarm Control
Service Channel Adjust
The IDR modem type is an open network application, primarily used for voice circuits.
IDR has a fixed overhead structure. Refer to Section A.1.6 for more information on IDR
theory of operation.
Rev. 4
Overhead G.703/IDR/IBS/ASYNC/AUPC/D&I card (PL/5305-1)
50-pin D relay adapter card (PL/5509)

Table 3-4. IDR Parameter Settings

Front Panel Setting
IDR
TX-V, QPSK 3/4
ON
RX-V, QPSK 3/4
TX Terrestrial, Internal, Ext.
Reference
Satellite, TX Terrestrial, Internal,
Ext. Reference
AMI, B8ZS, HDB3, or B6ZS
AMI, B8ZS, HDB3, or B6ZS
TX-1, TX-2, TX-3, TX-4
RX-1, RX-2, RX-3, RX-4
ON or OFF
TX-1, TX-2, RX-1, RX-2 levels
Reference Menu
Utility Modem Type
Configuration Modulator
Configuration Demodulator
Configuration Demodulator
Configuration Interface
Configuration Interface
Configuration Interface
Configuration Interface
Utility Interface
Configuration Interface
Operation
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