Hi Bill..thanks for the good suggestions..
jeff, wa1hco
On 05/03/2015 05:12 PM, Bill Somerville wrote:
On 03/05/2015 20:50, jeff millar wrote:
Hi Jeff,
thanks for the feedback, a few comments inline below:
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)
The widest IF filter on the IC-9100 is 3 kHz, you can move that around all of
the 4 kHz of JT65 and JT9 sub bands by using the TWIN PBT as an IF shift control.
Good point about moving the passband tuning. BTW, it appears the Rx passband
extends to 3.6KHz when set to 3.6 KHz width and moved up 300 Hz with PBT
o But, whenever WSJT-X changes bands, it forgets that the radio was in
"Data" mode and sets it SSB mode
Have you tried setting the "Mode" to "Data/Pkt" in "Settings->Radio"?
Ah. That's what that's for! Works perfectly.
* 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.
The IC-9100 has no controls for the AF out level to USB or the ACC jack, use
the Windows level controls in preference to the gain slider in WSJT-X.
Ok, using pavucontrol to bring the Rx slider in range..
* 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
The "Tx Pwr" slider is intended as an attenuator, all the way to the top is
0dB and is the default setting.
o With USB mod level at 100%, the Pwr slider backed off to the 1.5
ticks below max
Set the "Tx Pwr" to the top and adjust the rig's MOD level to give required
output i.e. just into ALC at full power. Use the rig's RF POWER control to set
your output between 2W and maximum, if you require less than 2W output then
resort to the WSJT-X "Tx Pwr" slider to reduce further.
Ok, I understand. I set the slider to max, set power output to max by the USB
Modulation Level. But the slider is extremely touchy. Backing off 3 dB is 1/4
of a tick.
thanks,
jeff, wa1hco
73
Bill
G4WJS.
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