Async Connector Pinout - J6 (Rev. A And Later Chassis); External Reference Input (Main Chassis) - J7 - Comtech EF Data CDM-700 Installation And Operation Manual

CDM-700 High Speed Satellite Modem
Connector Pinouts
5.1.4 ASYNC Connector Pinout – J6 (Rev. A and Later Chassis)
5.1.5 External Reference Input (Main Chassis) – J7
The J7 Ext Ref (External Reference) input is used to supply a master reference to the
entire chassis. The clocks on the Framer Card and the Modulator and Demodulator
Synthesizers are locked to this input, when it is used:
Some data interfaces have an Ext-Clk input for synchronizing the data sources. Refer to the
individual data interface card on the Data Interfaces appendix for details.
The J6 ASYNC Channel interface is a 9-pin, Type D female connector.
Pin # Description
1 Ground
2 RS-232 Transmit Data
3 RS-232 Receive Data
4 Not Used
5 Not Used
RS-485 Receive Data B *
6
7 RS-485 Receive Data A *
8 RS-485 Transmit Data B
9 RS-485 Transmit Data A
* Use for 2-wire RS-485 operation.
•
Female SMA connector (on the initially released chassis)
•
BNC female connector (on the Rev A or later chassis)
Direction
Out
In
In
In
Out
Out
5–4
Revision 5
MN/CDM700.IOM