Radyne DM240XR, Installation And Operation Manual

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Rear Panel Interfaces DM240XR-DVB High-Speed Digital Modulator
5-6 TM120 - Rev. 1.1
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
5.8 IF Output Port (J9 & J10)
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.
5.8.1 Output Monitor Port (J9)
The output monitor port on the DM240XR is an SMA female connector. The monitor is a sample
of the output frequency that is –20dBc +/-5dB from the output frequency power level.
5.9 RF Switch Control (J2)
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