User guide

MS-DMT Guide v1.04

Released 05-30-2014

external interface be in use that requires D.C. power from the RS-232 port, check “RS232

Power”, whichever line, RTS or DTR is not being used for PTT will be used for DTR power.

RIG

The RIG pull down menu is used to select the radio type for CAT support. By default when the

program is first started radio type NONE is selected, which precludes the sending of any CAT

commands.

All CAT serial port parameters are automatically configured when the radio type is selected, the

fast baud rate should always be used to minimize latency. There is no provision for the user to

change either handshaking parameters or radio addressing parameters. If the given radio type

selected ends with _DV or _DVx, the CAT commands are sent in support of Data/Voice

switching between Mic and Digital ports, even if CAT PTT is not selected for use. For details on

all currently supported CAT radios see Appendix F.

NOTE: If using an SDR transceiver and or Virtual Audio Cables (VAC) which can add latency either

transmit or receive signals be sure to utilize minimum buffer sizes for radio or VAC operation. The

http://groups.yahoo.com/group/MARS_Flexers/ forum is highly recommended as a resource Q&A site.

DATA PORT

The “DATA PORT” capability is in support of 3rd party external terminal applications use of the

software’s data modem capability on RX and TX where the MS-DMT software can be setup and

minimized if desired and all communications can then be handled by the external application.

WARNING: Prior to release of MS-DMT v1.00 Build 1.0.0.0 as file MSDMT_32.EXE in April 2013, the tool

was coded to support CTS/RTS handshaking on the Data Port and CTS/RTS or just RTS for PTT was

recommended to be used by any external terminal application during all of the development Alpha and

Beta builds. Also, if the Data Port was not set to 0 and there was no external terminal tool running, the