Dc Power Input/Switch; Dmd20 Chassis Connections (Standard); Ext Ref (J10); Tx If (J11) - Radyne DMD20 Installation And Operation Manual

DMD20/DMD20 LBST Universal Satellite Modem

5.2.2 DC Power Input/Switch

The Optional DC Power Input and Switch (Figure 5-1) is available for all DMD20 products. The
unit may be powered from a 36 – 75 VDC source with a maximum unit power consumption of 3 A.
Refer to Table 5-1 for pinouts.

5.3 DMD20 Chassis Connections (Standard)

5.3.1 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).

5.3.2 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.

5.3.3 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.

5.3.4 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.

5.3.5 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 1750 MHz in 1 Hz Steps.
TM103 – Rev. 2.5
Table 5-1. DC Power
A –
B Ground
C +
Rear Panel Interfaces
5-3