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DiAna, a software Distortion Analyzer
DiAna, a software Distortion Analyzer
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Old 19th November 2019, 06:37 PM   #891
lemon is offline lemon  Greece
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Edmond,
I have download the 1.58.9 Diana version to try it with the RTX6001 Analyzer.

First, I tried with asio4all driver a loop-back measurement @48KHz.
Using a DAC and ADC for synchronization: THD = 119.4dB.
Using the "bypass" method of synchronization: THD = -129.4dB.

The asio4all couldn't to measure at 192KHz for some kind of reason, so I tried to set the RTXAsio driver but always I had the same error (see attachment).
I closed the RTX usb utility from the tray but with no lucky.

How can I use the rtxasio on Diana (Win'10)?
Attached Images
File Type: png RTXasio_problem.png (41.8 KB, 122 views)
File Type: png asio3all_48KHz_internal.png (29.9 KB, 122 views)
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Old 19th November 2019, 07:03 PM   #892
Edmond Stuart is offline Edmond Stuart  Netherlands
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Hi Manolis,

Firstly, try V1.58.10. But I also had sometimes troubles with the RTX, depending on the switch-on sequence: First PC on and then RTX on, or just the opposite way.

Cheers, E.
PS: No issues when running in "normal" mode, i.e. without by-pass?
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Last edited by Edmond Stuart; 19th November 2019 at 07:11 PM.
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Old 19th November 2019, 08:34 PM   #893
thumb is offline thumb  Europe
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DiAna, a software Distortion Analyzer
Well my Win7 install keeps wanting to upgrade, how do one turn that of ?
I could live with only Win7 special if Diana/EMU works on that.
But @Edmond Stuart you Diana start up on wine/Linux but I can not see soundcard ASIO/Alsa so maybe it could work under linux like Arta. Maybe @phofman could help he is deep into alsa on linux?

ps found a Win server 2003 BUT is "feels" like a longer run :-]
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Old 19th November 2019, 08:53 PM   #894
Edmond Stuart is offline Edmond Stuart  Netherlands
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@thumb: Sorry, but DiAna doesn't work under Wine, that is, there are issues with the ASIO drivers. The reason is, according to Keantoken, that DiAna is a 32bits program, while the 32bits version of JACK seems to be buggy (the 64bit version of JACK however, is okay).
Cheers, E.
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Old 19th November 2019, 09:22 PM   #895
waltzingbear is offline waltzingbear  United States
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Seems like its mostly past as an item. but I'm just getting back to the computer.

The answer is yes, you can get cathode contamination, if you go too far.

For me the biggest use I had of this adjustment was when I was a broadcast engineer (for 30+ years). Adjusting the final tube filament to just above the point of power drop off would increase the tube life by a considerable quantity (depended on which transmitter), as these tubes run $5000 to $10000, you can see the advantage.

Over time the filament would be adjusted upwards toward bogey value, and of course the last month would be above bogey for the really cheap clients.

By watching the power transfer curve you can stay above the point were cathode contamination can be a problem. Much easier to do on a transmitter running class C than a home stereo amp.

Cheers
Alan

ps most of these transmitters have been replaced with solid state now, lower running cost, longer MTBF.
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Old 20th November 2019, 05:52 AM   #896
Douglas Blake is offline Douglas Blake  Canada
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Quote:
Originally Posted by thumb View Post
Well my Win7 install keeps wanting to upgrade, how do one turn that of ?
Control Panel -> Windows Update -> Change Settings -> Never check for updates.

You can also go into Control Panel -> Administrative tools -> Services then set the Background Intelligent Transfer and Windows Update services to Manual.
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Old 20th November 2019, 01:11 PM   #897
thumb is offline thumb  Europe
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DiAna, a software Distortion Analyzer
Quote:
Originally Posted by Douglas Blake View Post
Control Panel -> Windows Update -> Change Settings -> Never check for updates.

You can also go into Control Panel -> Administrative tools -> Services then set the Background Intelligent Transfer and Windows Update services to Manual.
Thanks, I will do that asap.
Anyway, @Edmond Stuart I installed Win7 32bit ver. instead of server 2003 and it look like it is more stable(Diana), have not had any crashes yet.
So to measure a DUT I have to do:
1: Make a loopback distortion measure A+B Channal
2: Save it as "Distortion save as" with name etc.
3: Put "Options" into "Differential" mode
4: Measure DUT with (Hot) channel could be "B"
And the result THD is correct ? whice in this case gave me THD -56Db and if I measure on my VP-7721A I get -56,8Db !!!
I love it So I'm looking forward for your pro-vertion

But but I still get crashes on Win7 64bit and Win10 64bit
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Old 20th November 2019, 07:00 PM   #898
lemon is offline lemon  Greece
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Quote:
Originally Posted by Edmond Stuart View Post
Hi Manolis,

Firstly, try V1.58.10. But I also had sometimes troubles with the RTX, depending on the switch-on sequence: First PC on and then RTX on, or just the opposite way.

Cheers, E.
PS: No issues when running in "normal" mode, i.e. without by-pass?
I tried the V1.58.10 and I followed your directions but with no lucky, the same message all the time.
Any ideas for the next?

The asio4all works well until 176.4KHz, at 192KHz there are artifacts on spectrum area and the results are very low!
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Old 21st November 2019, 11:18 AM   #899
Edmond Stuart is offline Edmond Stuart  Netherlands
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Quote:
Originally Posted by lemon View Post
I tried the V1.58.10 and I followed your directions but with no lucky, the same message all the time.
Any ideas for the next?
The asio4all works well until 176.4KHz, at 192KHz there are artifacts on spectrum area and the results are very low!
Hi Manolis,

Apparently. the communication with the USB port is blocked for some reason*. However, you can circumvent this message by disabling the USB port altogether (as far as the settings of the RTX are concerned). Just remove the check mark at "Autocalibration" in the "Sound Card" menu (only accessible when the RTX has first been selected). Now you can set the calibration factors manually, but should be, of course, in accordance with the gain settings on the RTX.
BTW, what OS are you using and how fast is your PC?

Cheers, E.

* It also might be possible that DiAna couldn't find the USB port of the RTX. If that is the case, a more appropriate error message should have been appeared, of course. This will be fixed in the next version of DiAna.
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Old 21st November 2019, 12:46 PM   #900
thumb is offline thumb  Europe
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DiAna, a software Distortion Analyzer
I just check EMU0202 with asio4all & normal asio 196kHz and Win7/32Bit do not work with Diana. I works fine in Arta.
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