Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 71)

Rear Panel Interfaces DMDVR20 LBST Satellite Modem
5-2 TM136 – Rev. 1.1
5.2 Power Input Modules
5.2.1 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 .5.2.2 DC Power
Input/Switch
The Optional DC Power Input and Switch (Figure 5-1) is available for all DMDVR20 LBST
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.
Table 5-1. DC Power
A –
B Ground
C +
5.3 DMDVR20 LBST Chassis Connections
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 L-Band IF (J11)
The Transmit Output Port is a 50-Ohm Type-N Connector. 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.
5.3.3 RX (J1)
The Receive Input Port is a 75-Ohm F-Type Connector. The IF Frequency can be programmed
from 950 to 2150 MHz in 1 Hz Steps.
5.3.4 ALARM (J15)
The Alarm Port is a 15-Pin Female “D” Connector. Refer to Table 5-2 for pinouts.
Table 5-2. ALARM Port 15-Pin Female “D” Connector (J15)
Pin No. Signal Name Signal Direction
1 Mod Fault MF-C No Direction
2 Mod Fault MF-NC No Direction
3 Mod Fault MF-NO No Direction
4 Demod Fault DF-C No Direction
5 Demod Fault DF-NC No Direction