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DM240XR High-Speed Digital Modulator Rear Panel Interfaces

MN-DM240XR– Revision 13 5–5

5.8 Alarm Port

The Alarm Connector (J3) is used to indicate the fault condition of the modulator to external

equipment. This male 9-Pin D-Sub Connector provides connection to two Form-C relays and an

open collector output. The user can distinguish between major and minor alarms with the relays.

Refer to Table 5-3 for connector pinouts. Table 5-4 below describes the alarm indications.

Table 5-3. Alarm Connector J3 Pin Assignment

Pin No. Connection

Relay 1 NO

2 Relay 1 C

3 Relay 1 NC (Major Alarm)

4 Ground

5 No Connect

6 Mod Fault (Open Collector)

7 Relay 2 NO

8 Relay 2 C

9 Relay 2 NC (Minor Alarm)

Table 5-4. Alarm Indications

Alarm Pin Description

None 1 – 2 shorted, 7 – 8 shorted, open collector output driven low

Minor 1 – 2 shorted, 8 – 9 shorted, open collector output driven low

Major 2 – 3 shorted, 7 – 8 shorted, open collector output open

5.9 IF Output Port (J10 & J11)

The DM240XR is designed to support IF and L-band frequencies. The rear panel of the

DM240XR has separate IF and L-Band connectors. Refer to figure 5.1a. The IF frequency is

programmable from 50-90Mhz to 100-180Mhz. The IF port is a 75 ohm BNC connector (J10).

The output power level is programmable from –25 to 0dBm in 0.1 dBm steps. The L-Band

frequency is programmable from 950 to 2050Mhz. The L-band port is a 50 Ohm SMA female

connector (J11). The output power level is programmable from -25 to 0 dBm in 0.1 dBm steps.

5.9.1 Output Monitor Port (J9)

The output monitor port on the DM240XR is an 50 Ohm SMA female connector. The monitor is

a sample of the output frequency that is –20dBc +/-5dB from the output frequency power level.

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Radyne DM240XR Especificaciones Pagina 75