3 tx mon port, 4 tx if port – Comtech EF Data QAM256 User Manual
Page 34
Rear Panel Interfaces
QAM256 Digital Video Modulator and Upconverter
5-2
TM077 - Rev. 4.0
8
Relay 2 C
9
Relay 2 NO (Major Alarm)
5.3 TX MON Port
The Transmit Monitor Port (J8) is a Female BNC Connector, -20 dB Monitor Port.
5.4 TX IF Port
The Transmit IF Port (J9) is a Female BNC Connector.
The RS-485 Remote Connector (J3) is a 9-Pin Female D-Sub Connector. The pinouts are listed
in Table 5-2.
Table 5-2. REMOTE Connection - 9-Pin Female D-Sub – J3
Pin No.
Signal Name
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
The RS-422 Transmit Parallel Connector (J1) is a 25-Pin Female D-Sub Connector. The pinouts
are listed in Table 5-3.
Table 5-3. PARALLEL Connection - 25-Pin Female
D-Sub – J3
Pin No.
Signal Name
Direction
1 OUTCLK
Output
14 OUTCLK
Output
2 BCLK+
Input
15 BCLK- Input
3 SYNC+
Input
16 SYNC- Input
4 VALID+
Input
17 VALID- Input
5 D0+
Input
18 D0- Input
6 D1+
Input