Rx If (J13); Rx L-Band If (J14); Alarm (J15); Ext Clk (J16) - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem

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.
Pin No.
1 Mod Fault - C
2 Mod Fault – NC
3 Mod Fault – NO
4 Demod Fault - C
5 Demod Fault – NC
6 Demod Fault – NO
7 Prompt - C
8 Prompt – NC
9 Prompt – NO
10 Service – C
11 Service – NC
12 Service – NO
13 No Connection
14 AGC Out
15 Ground

5.4.7 EXT CLK (J16)

The External Clock Port is a 75-Ohm Female BNC Connector. It allows interfacing to an
external clock source.
Input level: .3 to 5 volts Peak-to-Peak. (Sine or Square wave)
MN-DMD50– Revision 3
Table 5-2. ALARM Port 15-Pin Female "D" Connector (J15)
Signal Name Signal Direction
MF-C No Direction
MF-NC No Direction
MF-NO No Direction
DF-C No Direction
DF-NC No Direction
DF-NO No Direction
CEF-C No Direction
CEF-NC No Direction
CEF-NO No Direction
SP1-NO No Direction
SP1-NC No Direction
SP2-NO No Direction
SP2-NC No Direction
AGC No Direction
GND
User Interfaces
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