This document describes how to use the “rig.xml” file to specify interfacing to transceiver that only has hardware PTT that can be controlled using either RTS or DTR signal lines on a serial port. It is functionally equivalent to using the PTT specifiers on the Rig configuration tab. It provides an added benefit in that the "Rig Viewer" can be used to manually change the base frequency that the transceiver is tuned to.
The rig.xml for a dummy transceiver is simplicity itself. It consists of the following statements:| BAUD | 1200 (any valid number is OK |
| DEVICE | the full path to serial device; on Linux /dev/ttyS0 or on Windows COM1 for example |
| ECHO | FALSE (not used) |
| RETRIES | 8 (not used) |
| TIMEOUT | 50 (not used) |
| WAIT | 10 (not used) |
| DTRINIT | if DTR used for PTT set this to the polarity with PTT disabled, ie: -12 V |
| DTRPTT | TRUE / FALSE to specify whether DTR used for PTT |
| RTSINIT | if RTS used for PTT set this to the polarity with PTT disabled, ie: -12V |
| RTSPTT | TRUE / FALSE to specify whether RTS used for PTT |
| RTSCTS | FALSE |