Comtech-ef-data SDM-2020 Instrukcja Użytkownika Pobierz pdf (Strona 130)

SDM-2020 Satellite Demodulator Revision 4

RS-422 Data Interface MN/SDM2020D.IOM

7–4

7.3 Configuration

Note: The jumper location on the interface card is shown in Figure 7-1.

A single jumper provides the option for a transmit or receive reference clock on

connector J3 (pins 2 and 15). The pins are configured at the factory as signal ground per

TM 1449. An SCT output is required in conjunction with using the DVB Data port (J3).

SCT may be jumped to pins 2 and 15, thus providing all signals on a single connector.

The same jumper configuration in the demodulator applications provides for a Master

clock input. Alternatively, SCT and Master clock interconnects are available on the

Auxiliary port (J5).

DVB

CONFIGURATION

(FACTORY SETTING)

J3 DVB

PARALLEL/SERIAL

J4 EIA-530

SERIAL

J5 AUX

J3 - 2 & 15 GND

NOTE:

JUMPER SELECTS FOR

PINS 2 & 15 OF THE J3

DVB PARALLEL/SERIAL

REAR PANEL CONNECTOR

Figure 7-1. RS-422 Interface Module PCB

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 233 234

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Comtech-ef-data SDM-2020 Instrukcja Użytkownika Strona 130