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DM240XR High-Speed Digital Modulator Rear Panel Interfaces

MN-DM240XR– Revision 13 5–6

5.10 RF Redundancy Switch Control (J2)

The Each modulator has a 9-pin D-sub connector for the switch. A 1:1 cable is connected from

each modulator to the switch. The pinout for the control connector is listed in Table 5-5.

Table 5-5. RF Switch Control 9-pin ‘D’ Female (J2)

Pin No. Signal Description Direction

5 Signal Ground Modulator GND Output

9 Backup Select

One modulator is designated as

Backup. This line is tied low on the

Backup Mod Control connector.

Input

1 +DC +12V DC power Output

2 nPrime_Sel Forces On-Line output to Prime Output

7 nBackup_Sel Forces On-Line output to Backup Output

8 Local Fault Fault output of modulator Output

4 Distant Fault State of distant modulator Input

3 Switch-State

Switch state monitor.

Logic '1' = Prime Online

Input

6 NC --- ---

5.11 Built in ASI/Advanced ASI Interface (J7)

The “Built In” ASI/AASI comes standard on every DM-240XR unit. This ASI interface is

supported on the BNC Connector. The interface complies with DVB ASI Electrical

Specifications. The maximum data rate is 216 Mbps.

The AASI Interface is a specialized mode of the normal ASI Interface. The interface allows the

user to input a variable rate data stream into the modulator (as long as the input data rate does not

exceed the programmed data rate). The AASI Interface inserts MPEG-2 Null Packets to provide

a constant data rate to the modulator.

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Radyne DM240XR Especificaciones Pagina 76