I've been using the IC-9100 USB interface with WSJT-X, version 1.5-rc1 with
Ubuntu 15.04 Desktop.
First the good news
* The internal sound card and two serial interfaces were supported by Ubuntu
by default
* The CAT interface worked first try and very smoothly on TTYUSB0
* The built in USB sound card serial ports appears with different
identifications
o from the lsusb list: TI PCM2901 in the lsusb list and Cygnal CP210X UART
o from WSJT-X Settings/Audio:
alsa_input.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00-CODEC.analog-stereo
There are a few quirks worth mentioning.
* The 9100 has a Data Mode that can have a different Rx bandwidth from SSB mode
o I set data mode to 3.6 KHz to see some of the JT9 band (without making
SSB mode too wide)
o But, whenever WSJT-X changes bands, it forgets that the radio was in
"Data" mode and sets it SSB mode
* Receiving USB sound may have the level about 30 dB too high
o So had to move the input level slider all the way down.
* Transmitting USB sound may have the level too low
o With default USB mod level at 50%, the Pwr slider had to go all the way
up
o With USB mod level at 100%, the Pwr slider backed off to the 1.5 ticks
below max
thanks,
jeff, wa1hco
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