Comtech-ef-data SDM-2020 Instrukcja Użytkownika Pobierz pdf (Strona 7)

s:\tpubs\manuals\released_word\modems\sdm2020d_rev4\text\errata c.doc

Errata C

Comtech EF Data Documentation Update

Subject:

Revised Paragraph to Include 1.544 and 2.048 Mbps

Date:

July 19, 2006

Document:

SDM-2020 Satellite Demodulator Installation and Operation

Manual, Rev. 4, dated April 18, 2003

Part Number:

MN/SDM2020D.EC4

Collating Instructions:

Attach this page to page 11-1

Comments:

The following changes provide include 1.544 and 2.048 Mbps.

Change Specifics:

The G.703 interface provides connection to the standard plesiochronous digital hierarchy (PDH). With this

interface the modulator or demodulator operates at a fixed rate of 1.544, 2.048, 6.312, 8.448, 32.064,

34.368, 44.736, or 51.840 Mbps. An auxiliary connector provides open collector fault lines for reporting a

failure to external equipment like a redundancy switch. The G.703 signals connect to the module’s BNC

female connectors, and the signals supported are SD, RD and EXT (external) Clock.

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Comtech-ef-data SDM-2020 Instrukcja Użytkownika Strona 7