Operating instructions

Electrical Interfaces DVB3030/DVB3030L Digital Video Broadcast Modulator

5-2 TM052 - Rev. 3.5

Table 5-1. J4 (J7 L-Band) - 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

5.5 Terminal Port (I/O)

The Terminal Port Interface (J10 for DVB3030, J5 for DVB3030L) 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 5-2.

Table 5-2. J10 (J5 L-Band) - 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 ---

5.6 Alarm Port

The Alarm Connector (J3 for DVB3030, J6 for DVB3030L) is used to indicate the fault condition

of the modulator to external equipment. This male 9-Pin D-Sub Connector provides connection

to two form-c relays and an open collector output. The user can distinguish between major and

minor alarms with the relays. Refer to Table 5-3 for connector pinouts. Table 5-4 below

describes the alarm indications.

Table 5-3. Alarm Connector J6 Pin Assignment

Pin No. Connection

Relay 1 NO

2 Relay 1 C

3 Relay 1 NC (Major Alarm)

4 Ground

5 No Connect

6 Mod Fault (Open Collector)

7 Relay 2 NO

8 Relay 2 C

9 Relay 2 NC (Minor Alarm)