Preventing PTT and CW control getting stuck
Turning off RS-232 serial port control lines in case PTT switch or CW keying is stuck
These instructions apply to radio transceiver models and CAT interfaces, which uses RS-232 serial port RTS/DTR control lines to control the PTT switch and CW keying.
Serial port control lines may in some cases be left in a state, which keeps PTT switch or CW keying active. The issue leads to the radio transceiver having PTT or CW keying (in CW mode) stuck in active state, so that it is not possible to turn PTT or CW keying off.
In many cases, the RS-232 serial port RTS/DTR control lines control both the PTT switch and CW keying. The RTS control line usually controls PTT and the DTR control line controls CW keying, but it is necessary to check this from the radio or interface documentation.
In order to turn off RTS/DTR control lines to prevent PTT or CW keying getting stuck, add the following line to
the configuration file below the line defining
rigDevice for the serial port.
Turning off the RTS control line: (preserve the number of spaces)
Turning off the DTR control line: (preserve the number of spaces)
The final configuration for a radio with DTR control line turned off should follow the example presented below:
... (continued) devices: - id: "radio1-id" type: "rigctld" rigctld: localInstance: enabled: true model: RADIO_MODEL_NUMBER serialSpeed: SERIAL_SPEED rigDevice: "SERIAL_PORT_DEVICE" dtrState: false ... (continued)