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Rear Panel Interfaces
DM240-DVB High-Speed Digital Modulator
5-4
TM083 - Rev. 3.0
5.4 External Reference (Input)
The External Reference Input (J3) is supplied to allow the customer to phase-lock the modulator’s
internal oscillator to an external reference.
This female BNC Connector accepts a 1.5 – 5 Vp-p @ 50 Ohms. The frequency range of the
external reference is 1 – 10 MHz in 8 kHz steps.
5.5 Remote Port (I/O)
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.
Pinouts are listed in Table 5-1.
Table 5-1. 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 (I/O)
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 5-2.
Table 5-2. 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 ---
7
RTS
Request to Send
Output
8
CTS
Clear to Send
Input
5.7 Alarm Port
The Alarm Connector (J6) 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.
Содержание DM240-DVB
Страница 3: ......
Страница 13: ...Introduction DM240 DVB High Speed Digital Modulator 1 2 TM083 Rev 3 0...
Страница 17: ...Installation DM240 DVB High Speed Digital Modulator 2 4 TM083 Rev 3 0...
Страница 23: ...User Interfaces DM240 DVB High Speed Digital Modulator 4 4 TM083 Rev 3 0 Figure 4 2 DM240 Main Programming Menu...
Страница 49: ...User Interfaces DM240 DVB High Speed Digital Modulator 4 30 TM083 Rev 3 0 Figure 4 12 RF Switch Control Menu...
Страница 63: ...Maintenance and Troubleshooting DM240 DVB High Speed Digital Modulator 6 2 TM083 Rev 3 0...
Страница 67: ...Technical Specifications DM240 DVB High Speed Digital Modulator 7 4 TM083 Rev 3 0...
Страница 106: ...Appendix B DM240 DVB High Speed Digital Modulator B 16 TM083 Rev 3 0...