Smpte-310m interface – Comtech EF Data SDM-2020 User Manual

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12–1

Chapter 12. SMPTE-310M

INTERFACE

This section describes the plug-in SMPTE-310M Data Interface used with the SDM-2020
Demodulator.

12.1

SMPTE-310M/SSI Data Interface (PL/6175-2)

IMPORTANT

This module is used in either the SDM-2020 Modulator or Demodulator.

The SMPTE 310M interface is also based upon the DVB’s SSI specification but operates
only at the ATSC-8VSB data rate of 19.392 658 Mbps (the ATSC-16VSB rate of 38.785
316 Mbps is not implemented). The data is input/output on a BNC female connector as an
800 mV signal with biphase mark encoding. A separate auxiliary connector provides fault
status.

12.1.1 Applicable

Documents

Applicable documents, as referenced herein, include:

• SMPTE 310M Synchronous Serial Interface for MPEG-2 Digital Transport

Stream

• EN 80053-9, Interfaces for CATV/SMATV Headends and Similar Professional

Equipment