Edmac Satellite Framing/Deframing Mode; Locating The Id Code Operational Procedure; Strap Codes - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem

3.16 EDMAC Satellite Framing/Deframing Mode

The modem supports EDMAC satellite framing. EDMAC can be enables for both modulator and
demodulator satellite framing when modem is configured in CLOSED NET applications.
EDMAC satellite framing DOES NOT allow control or monitoring of the remote slave modem.
On the demodulator, terrestrial date is framed with NULL EDMAC commands, having no effect
at the remote demodulator. On the demodulator, EDMAC commands are stripped from the
satellite data stream and discarded, leaving the terrestrial data steam intact. EDMAC
Framing/Deframing is provided for compatibility purposes only.

3.17 Locating the ID Code Operational Procedure

The modem has unique ID codes that allow the user to add feature upgrades to the modem
without the unit having to be returned to the factory. Users are required to identify these ID codes
when they want additional features added to their unit. Comtech will supply a new ID code that is
required to be entered in the ID code field. Once the new ID code is entered, the modem will
activate the new features.
Refer to Appendix B for upgrade procedures.

3.18 Strap Codes

The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of
the modem, Strap Codes are very helpful. When a Strap Code is entered, the modem is
automatically configured for the code's corresponding data rate, overhead, code rate, framing,
scrambler type and modulation. An example of how to set a strap code follows:
Example: In the Ethernet interface <Modulator> Menu, depress the Transmit Gel-tab, then move
the cursor down and depress "General". Now move the cursor over to 'Strap Code'. Click inside
the box and enter the new strap code submenu and enter #16. The DMD50 will be automatically
configured to the parameters shown below in the highlighted row 'Strap Code 16'.
Refer to Appendix D or the various strap code options.
MN-DMD50– Revision 3
Theory of Operation
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