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DMD50 Universal Satellite Modem
Table 5-2. ALARM Port 15-Pin Female "D" Connector (J15)
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)
5.4.8 ASYNC (J17)
The Asynchronous Data Interface Port is a 9-Pin Female "D" Connector. Refer to Table 5-3 for
pinouts.
Table 5-3. ASYNC Port 9-Pin Female "D" Connector (J17)
Pin No.
1
Receive Data B (RS-485)
2
Receive Data A (RS-485/-232)
3
Transmit Data A (RS-485/-232)
4
Transmit Data B (RS-485)
5
Ground
6
No Connection
MN-DMD50 Revision 4
Signal Name
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
Signal
Direction
RXD_B
RXD_A
TXD_A
TXD_B
GND
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Rear Panel Interfaces
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Output
Output
Input
Input
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5–4
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