Comtech EF Data DD240XR Rev Е - Manual (Page 92)

Electrical Interfaces DD240XR High-Speed Digital Demodulator
5-4 MN-DD240XR – Rev. E
Table 5-2. Alarm Indications
Alarm Pin Description
None 1 – 2 shorted, 7 – 8 shorted, open collector output driven low
Minor 1 – 2 shorted, 8 – 9 shorted, open collector output driven low
Major 2 – 3 shorted, 7 – 8 shorted, open collector output open
5.5 Remote Port (J4)
The Remote Port Interface (J4) can be used for the monitor & control functions of the unit. The
physical interface is a female 9-Pin D-Sub Connector. This bi-directional port complies with
RS-485 Electrical Specifications. Refer to Section 7.6 for protocol and programming details. Pin
outs are listed in Table 5-3.
Table 5-3. J4 - RS-485 Remote Control- 9-Pin ‘D’ Female
Pin No. Signal Description Direction
1 Tx (B) Transmit Data (+) Output
5 GND Ground -
6 Tx (A) Transmit Data (-) Output
8 Rx (B) Receive Data (+) Input
9 Rx (A) Receive Data (-) Input
5.6 Terminal Port (J5)
The Terminal Port Interface (J5) can be used for the monitor & control functions of the unit. The
physical interface is a female 9-Pin D-Sub Connector. This bi-directional port complies with
RS-232 Electrical Specifications. Refer to Section 4.6 for terminal interface details. The pinouts
are listed in Table 5-4.
Table 5-4. J5 - RS-232 Terminal Port - 9-Pin ‘D’ Female
Pin No. Signal Name Description Direction
3 TxD Transmit Data Output
2 RxD Receive Data Input
5 GND Ground ---
5.7 RX RF IN (L-Band) (J6)
The Receive RF In (L-Band) (J6) Port is the L-Band input for the DD240 L-Band, 950 – 2150 MHz
tuning ra
nge through a 75Ω Female F-Type Connector.
5.8 RX IF IN (J7)
The RF Port is a 75Ω Female BNC-Type Connector, and the tuning range is 50 – 180 MHz.