Comtech EF Data CDD-880, Installation And Operation Manual

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CDD-880 Multi Receiver Router MN-CDD880
Serial-based Remote Product Management Revision 2
7–3
Access to the interface is accomplished with a user-supplied terminal emulator program such as Tera Term or HyperTerminal. Use this
utility program to first configure serial port communication and terminal display operation:
•
38400 bps (Baud Rate)
•
8 Data Bits
•
1 Stop Bit
•
Local Echo = ON
•
Parity = NO
•
Port Flow Control = NONE
•
Display New line Rx/Tx: CR
When the user-supplied terminal emulator program is configured correctly, upon power-up of the system, the COMTECH EF DATA CDD-
880 SERIAL INTERFACE Info Screen appears, followed by the command prompt CDD-880> . From here, type “ help[cr]” or “ ?[cr]” (without
the quotes) to display the available “set” commands and “get” queries, and to review instructions for using the interface.
7.2 Remote Commands and Queries Overview
7.2.1 Basic Protocol
In an EIA-232 configuration, the Controller device is connected directly to the Target device via a two wire-plus-ground connection. All data
is transmitted in framed packets as asynchronous serial characters, suitable for transmission and reception to the Controller using a
universal asynchronous receiver/transmitter (UART). Controller-to-Target data is carried via EIA-232 electrical levels on one conductor, and
Target-to-Controller data is carried in the other direction on the other conductor:
• Controller-to-Target:
The Controller device (e.g., the user PC/Serial Interface) is used to “set”, or transmit, instructions (commands)
to – or to “get”, or request, information from (queries) – the Target device (i.e., the CDM-800).
•
Target-to-Controller: The Target, in return, only transmits response information to the Controller when specifically directed by the
Controller.
For Serial Remote Control, all issued commands (
Controller-to-Target
) require a response (
Target-to-Controller
). This response is either
to return data that has been queried by the Controller, or to confirm the Target’s receipt of a command to change the Target’s
configuration.