Am 09.12.2022 um 15:37 schrieb Michael Black via groups.io <mdblack98@...>:

Hamlib knows nothing about audio so cannot, by itself, generate any audio.
Rig in FM or CW should generate a carrier as opposed to USB/LSB with a suppressed carrier.

Mike W9MDB










On Friday, December 9, 2022 at 02:15:30 AM CST, Christoph v. Wüllen <dl1ycf@...> wrote:





I have once made a "GUI rig controller" and this is how I implemented
emitting a "TUNE" using hamlib:

a) set power to desired value
b) change mode to FM
c) activate PTT

at the end of "TUNE" I then do

a) deactivate PTT
b) change mode to previous mode
c) set power to previous value

For each step, there is a hamlib command, while there seems to be none
for just emitting a carrier.

Am 08.12.2022 um 22:18 schrieb jimahlstrom <jahlstr@...>:

There is currently no HamLib control for Spot. The command does not seem to exist in rig 2. What commands from the Flex ZZ list do you want to add?

Jim
N2ADR

Am 08.12.2022 um 22:18 schrieb jimahlstrom <jahlstr@...>:

There is currently no HamLib control for Spot. The command does not seem to exist in rig 2. What commands from the Flex ZZ list do you want to add?

Jim
N2ADR

Am 08.12.2022 um 22:18 schrieb jimahlstrom <jahlstr@...>:

There is currently no HamLib control for Spot. The command does not seem to exist in rig 2. What commands from the Flex ZZ list do you want to add?

Jim
N2ADR

To determine if the spectral hump in the center is noise, switch Quisk's mode to DGT-IQ, tune to the center where the spectral hump is and give it a listen on stereo headphones. What you hear is more-or-less a direct feed from your audio interface as it is heard by Quisk. The center hump does NOT look amplitude/phase/delay related, or, at least, whatever amp/phase issues are being buried by a much bigger issue.

I warn that some of those Behringer interfaces have subsample delay which will cause phase/mirroring issues. If your hardware indeed has that bug, phase corrections will be futile as the subsample delay changes every time the interface is powered up, making the saved corrections unusable. I did a write-up on this a few months ago:

On Nov. 24th you stated? "The image seems to reduce but then goes back to the previous level." but did not state /when/ it goes back to the previous level, so I can't comment as to whether or not subsample delays, which change with every powerup, is contributing to your issue.

It's doubtful that the interface is placing bass emphasis on the audio /input/ as low frequencies are not generally a bottleneck in transformerless recording.?

My understanding is that you are using a Behringer Line2 for input. I don't know if it has the subsample delay bug. It's not clear if you are still using the UFO202 for output. From what I can find, the UFO202 uses a TI 2902 chip, which I had confirmed has the subsample delay bug.

Looking at the softrock ensemble 40 RX's schematic, I don't see any isolation transformers on the softrock's analog audio output but I do see isolator caps. Ground hum, usb data noise, ethernet noise or supply noise may be happening. The DGT-IQ listen should help determine that.

On Mon, Dec 5, 2022 at 12:48 PM Nigel Johnson MIEEE via <nw.johnson=[email protected]> wrote:

I got that, but the Behringer does not have USB output!

Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
Skype:  TILBURY2591 

On 2022-12-05 12:44, Ben Cahill wrote:

Hello Nigel,

I mean listening to the Behrenger's digital USB output, via an audio app of some sort on your computer, rather than via Quisk.

Good luck!

-- Ben, AC2YD --

On 12/5/22 09:35, Nigel Johnson MIEEE via wrote:

The line2 by Behringer does not have outputs, just inputs.?

Hello Nigel,

I mean listening to the Behrenger's digital USB output, via an audio app of some sort on your computer, rather than via Quisk.

Good luck!

-- Ben, AC2YD --

On 12/5/22 09:35, Nigel Johnson MIEEE via groups.io wrote:

The line2 by Behringer does not have outputs, just inputs.?

The line2 by Behringer does not have outputs, just inputs.?

Hello Nigel,

I'm as mystified as you are, but I would be surprised if a generic driver would do that sort of pre-emphasis processing (I could be wrong).

Have you tried simply listening to the audio coming from your sound card (without going through Quisk)?? I'm wondering if the raw sound might give a clue as to the origin of the bump.? Perhaps try comparing the sound from your Line2 USB with your UFO202?

Good luck!

-- Ben, AC2YD --

On 12/3/22 21:42, Nigel Johnson MIEEE via groups.io wrote:

OK, I brought the box with the softrock 40 ensemble and raspberry pi down from the roof and hooked it up to the service monitor.? ?I can clearly see there are no images of any signal that I inject at normal levels playing with it around 7.12 MHz.? The only way I can see images is if I turn the service monitor's attenuator way up beyond any signals that I would ever receive, hundreds of mV of signal. It clearly shows and demodulates AM with a few uV of RF. When I had it up on the roof I could clearly demodulate WWV, CHU, some broadcast stations and 40m CW signals, so I know it is working.

The noise level at the edges of the screen is sitting at around -80 dBm, but there is still this mountain rising by 30dB in the noise floor +/- 10 kHz from the VFO (on 40m)

Right now I think I am in need of somebody who can help me debug the linux driver.? I originally tested this setup with a Behringer UFO202 USB sound card (which uses a TI chip), but when I built it into a small box to put up on the roof I bought a Behrigner Line2 USB for the size, which uses a C-Media chip.? That is when the mountain appeared.

I cannot see anywhere that the driver is named to differentiate what chip it is expecting, it is just called snd_usb_audio.? I perceive that there is something in the driver that is pre-emphasizing the lower frequencies.? There is very little info on the C-Media web site, they obviously are oriented to just supplying chips to board makers.

Is there anybody in this group that has experience with linux drivers?

73 de Nigel ve3id

OK, I brought the box with the softrock 40 ensemble and raspberry pi down from the roof and hooked it up to the service monitor.? ?I can clearly see there are no images of any signal that I inject at normal levels playing with it around 7.12 MHz.? The only way I can see images is if I turn the service monitor's attenuator way up beyond any signals that I would ever receive, hundreds of mV of signal. It clearly shows and demodulates AM with a few uV of RF. When I had it up on the roof I could clearly demodulate WWV, CHU, some broadcast stations and 40m CW signals, so I know it is working.

The noise level at the edges of the screen is sitting at around -80 dBm, but there is still this mountain rising by 30dB in the noise floor +/- 10 kHz from the VFO (on 40m)

Right now I think I am in need of somebody who can help me debug the linux driver.? I originally tested this setup with a Behringer UFO202 USB sound card (which uses a TI chip), but when I built it into a small box to put up on the roof I bought a Behrigner Line2 USB for the size, which uses a C-Media chip.? That is when the mountain appeared.

I cannot see anywhere that the driver is named to differentiate what chip it is expecting, it is just called snd_usb_audio.? I perceive that there is something in the driver that is pre-emphasizing the lower frequencies.? There is very little info on the C-Media web site, they obviously are oriented to just supplying chips to board makers.

Is there anybody in this group that has experience with linux drivers?

73 de Nigel ve3id

Hello Graeme,

You can not telnet into port 4585 because you can not answer the security challenge from the remote. Remember that the pass phrase must be present on both ends. This design is meant to prevent an attacker from taking over your station.

Jim
N2ADR