Power Input Modules; Ac Power Input Module; Dc Power Input/Switch; Chassis Connections (Standard) - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
5.3

Power Input Modules

5.3.1 AC Power Input Module

AC Input Module (Figure 5-1) is located on the left side of the unit. Power applied to the port
with the supplied power cable is 100 – 240 VAC, 50 – 60 Hz. Integrated into the Power Input
Module is the Power On/Off Rocker Switch. Power consumption for the unit is 1A. A chassis
ground connection (#10-32 threaded stud), is located to the lower right of the module.

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.
MN-DMD50– Revision 3
Table 5-1. DC Power
DC Power
A –
B Ground
C +
User Interfaces
5–3