I am having an issue with WSJT-X v1.4.0-rc2 on Linux with a MicroHam-III USB sound card interface and an Icom 746PRO CAT-connected radio. I am using the build offered here,
http://physics.princeton.edu/pulsar/K1JT/wsjtx-1.4.0-rc2.x86_64.rpm The issue is that whenever the software commands the radio via CAT, DTR is asserted on the serial device (/dev/ttyUSB0) and this causes the radio to go into transmit. DTR is never desserted after the CAT command has completed and so the radio stays transmitting until I power it off, kill the app or it burns up :-) This occurs as soon as the app is launched, presumably because it is querying the radio for current operating frequency, mode, etc. I also use the stock build of FLDigi software (which uses hamlib too) on this same hardware configuration and it does not exhibit this problem. The MicroHam-III interface might be somewhat unique in that it uses DTR on the CAT port to pull the PTT line for the radio but this is their "off-the-shelf" configuration with their stock radio cable and recommended jumper settings in the interface so I am inclined to fix the software and not call it a hardware issue. I believe FLDigi does not have this problem because when they open the CAT port, they must immediately issue a termio function to deassert DTR (and RTS) and then only assert those if they are the selected PTT method. If PTT is done by CAT command, DTR should never be asserted. I can force DTR to drop by issuing, stty -F /dev/ttyUSB0 hupcl from another window so I do this to keep the radio from actually burning up ;-) I am running on Fedora Core 20 and I have asked Josh (who recently posted a success with FC20 and r3609) for his build recipe and if I can successfully build this newer version, I can probably offer a fix/patch for the problem. 73, Chris -- Chris Elmquist NØJCF ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
