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DMD50 Universal Satellite Modem
5.3.2 DC Power Input/Switch
The Optional DC Power Input and Switch (Figure 5-1) is available for all DMD50 products. The
unit may be powered from a 48v ± 5vdc VDC source with a maximum unit power consumption
of 3 A. Refer to Table 5-1 for pinouts.
5.4
Chassis Connections (Standard)
5.4.1 EXT REF (J10)
The External Reference Port is a 50 Ohm Female BNC Connector and will accept the following
frequencies: 1.0, 1.544, 2.0, 2.048, 5.0, and 10.0 MHz).
Input level: .1Vpp to 5Vpp (Sine or Square wave)
5.4.2 TX IF (J11)
The Transmit IF Output Port is a 75-Ohm Female BNC Connector that is used for 70/140 MHz
IF. The power level is programmable from 0 to -25 dBm in 0.1 dBm steps. The IF Frequency
can be programmed to 50 – 90 MHz or 100 – 180 MHz, in 1 Hz Steps.
5.4.3 TX L-Band IF (J12)
The Transmit IF Output Port is a 50-Ohm SMA Female Connector that can be used for L-Band
IF. The power level is programmable from 0 to -25 dBm, in 0.1 dBm steps. The IF Frequency
can be programmed to 950 – 2050 MHz, in 1 Hz Steps.
5.4.4 RX IF (J13)
The Receive IF Input Port is a 75-Ohm Female BNC Connector that is used for 70/140 MHz IF.
If the customer orders the 70/140 MHz IF, the Transmit IF Output Port is a 75-Ohm Female BNC
Connector.
5.4.5 RX L-Band IF (J14)
The Receive IF Input Port is a 50-Ohm SMA Female Connector that can be used for L-Band IF.
The IF Frequency can be programmed from 950 to 2050 MHz in 1 Hz Steps.
5.4.6 ALARM (J15)
The Alarm Port is a 15-Pin Female "D" Connector. Refer to Table 5-2 for pinouts.
MN-DMD50 Revision 4
Table 5-1. DC Power
DC Power
A
–
B
Ground
C
+
Rear Panel Interfaces
5–3
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