Search found 50 matches

by Daniel (Intona)
July 31st, 2020, 1:36 pm
Forum: USB Isolator and Audio
Topic: Post your gear
Replies: 10
Views: 422

Re: Post your gear

I found a cheap DAC (Asus Xonar X7) in the lab that uses the CM6632A, which is very similar to the CM6631A. Connected to the iMac in front of me, connected via three different Intona isolators lying around. Worked out of the box. All the different I/O is available and usable. So I guess, it's not th...
by Daniel (Intona)
July 27th, 2020, 8:08 pm
Forum: USB Isolator and Audio
Topic: Post your gear
Replies: 10
Views: 422

Re: Post your gear

When the LED goes off, the isolator is detecting the USB sleep mode. If the Orchid is actually just 100 mA asking, the AUX supply won't help. Nevertheless, you can try it quickly using a standard cell phone loader with USB micro connector. But I guess, this won't help. Well, the isolator does the ha...
by Daniel (Intona)
July 13th, 2020, 9:47 am
Forum: POEsy Ethernet Switch
Topic: PoE powered switch that can power other PoE devices
Replies: 4
Views: 288

Re: PoE powered switch that can power other PoE devices

There are a lot. Just a few of them: Audio: If you have a Dante, AES67 or AVB network running but don't want to star-wire each loudspeaker. This product enables you to daisy-chain tens of additional nodes. In case of AVB, there will be an additional model with active PTP, as required by the standard...
by Daniel (Intona)
July 9th, 2020, 12:12 pm
Forum: Ethernet Debugger
Topic: Observe CRC errors and interpacket gaps in Wireshark
Replies: 1
Views: 219

Re: Observe CRC errors and interpacket gaps in Wireshark

Here it is.
IN8089_v2b.jpg
Available now on request.
by Daniel (Intona)
July 2nd, 2020, 10:36 am
Forum: USB Isolator and Audio
Topic: Isolate an external HDD ?
Replies: 1
Views: 88

Re: Isolate an external HDD ?

As long the 12V for the external HDD is a separate, galvanically isolated supply, I don't see any benefit in isolation. An isolator would be more a protection barrier here. But if the 12V HDD supply is maybe an audiophile style linear supply that is shared to power different devices, you will easily...
by Daniel (Intona)
July 1st, 2020, 3:14 pm
Forum: POEsy Ethernet Switch
Topic: PoE powered switch that can power other PoE devices
Replies: 4
Views: 288

Re: PoE powered switch that can power other PoE devices

Here it is: POEsy.

4-port Daisy Chain Switch. Powered by either POE or DC 5.5/2.1 connector. Provides POE as well.


poesy_front_back.jpg
Available very soon.
by Daniel (Intona)
July 1st, 2020, 10:52 am
Forum: Cables and Audio
Topic: when intona network cable come to market?
Replies: 1
Views: 148

Re: when intona network cable come to market?

There is currently no schedule, but we are aware about the customer demand.
I will let you know when we have some cables available for evaluation.
by Daniel (Intona)
June 16th, 2020, 6:05 am
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

Edit: Not sure if you have these in USB 2.0, but that is all my current set up uses. Unfortunately, this is available in USB 3.0 configuration only. Look at first photo in this thread, the B-Connector is somewhat higher and only fits into 3.0. Although, this cable can of course transmit both USB 2....
by Daniel (Intona)
June 6th, 2020, 12:04 pm
Forum: USB Isolator and Audio
Topic: PC - DAC ground loops - which Isolator
Replies: 1
Views: 273

Re: PC - DAC ground loops - which Isolator

Hi Chris, first, I need to rectify the isolation property: Intona 7055-C - which isolates only the DC current Intona 7055-D - which isolates the AC current This is not correct. All isolators do both AC and DC isolation. The difference is that the amount of isolation is specified differently here. Th...
by Daniel (Intona)
June 4th, 2020, 7:56 am
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

But you haven't made an argument for completely disregarding strand interaction in USB cable. As noted above, I have heard this myself in audio cables, so why can't it also affect data cables given the lack of data correction in audio DACs and the far higher frequencies involved? Couldn't small amo...
by Daniel (Intona)
May 30th, 2020, 11:50 am
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

But there is no audio on the USB data lines, just coded data which is decoded as audio in the receiver. USB transmission failure cannot affect audio in sense of sound balance but in another way. If data was corrupted on the cable, the receiver will throw a checksum error. In the normal case of USB, ...
by Daniel (Intona)
May 29th, 2020, 11:48 am
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

With particular regard to the conductors carrying the USB 2.0 signals, are you using stranded or solid-core wire?
Stranded wire. I am eager to learn about the background of your question. What difference would you expect if it was solid-core?
by Daniel (Intona)
May 18th, 2020, 2:35 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Nice, but I don't make any statements without having serious measurements on this. Just quoting values out of the datasheet of single components that are just a part of the whole system ain't my style.
by Daniel (Intona)
May 18th, 2020, 1:48 pm
Forum: USB Isolator and Audio
Topic: Using intona outdoor
Replies: 4
Views: 308

Re: Using intona outdoor

Those split cables are just usual hubs and work surprisingly good. Try it.

You can use a Y-split power injection cable for powering the isolator at primary side (and not being a hub):
[External Link Removed for Guests]
by Daniel (Intona)
May 18th, 2020, 10:58 am
Forum: USB Isolator and Audio
Topic: Using intona outdoor
Replies: 4
Views: 308

Re: Using intona outdoor

I don't know if any earlier or later android version works better.
Your problem is clearly the power delivery and the only thing that I suggest is reducing the setup. Isn't it the case that Regen can power the next device? Then you could use your power bank there.
by Daniel (Intona)
May 16th, 2020, 11:15 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

What happens measurement wise if you use the aux port to power the USB 3.0 SuperSpeed Isolator 5kV instead of using the USB supplied power? Would the choice of psu supplying power to the aux port mean anything for measurements? Good question! The AUX port powers the USB device directly (not the iso...
by Daniel (Intona)
May 16th, 2020, 4:41 pm
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

Minimalist wrote:
May 16th, 2020, 4:29 pm
Hoping to buy the 7055-C soon as well, once the exchange rate improves.
-> PM
by Daniel (Intona)
May 15th, 2020, 8:53 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Further, how do the jitter measurements compare between the 7054 and 7055-B? Don't confuse USB data jitter with jitter of MCK inside your DAC. They have no relationship to each other. About the USB data jitter, these measurements using our LeCroy SDA-6020 are still valid for 7055: //intona.eu/en/su...
by Daniel (Intona)
May 15th, 2020, 5:58 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Well, the difference in noise level of 0.0000016 V RMS on the USB VBUS cannot be propagated to the audio outputs of any decent DAC (which has its own filtering/isolation plus the usual PSRR).
by Daniel (Intona)
May 15th, 2020, 4:01 pm
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

Do you happen to have an USB 3.0-B port? Look at the shape on the first photo above. You cannot use the cable if you don't have such a port.
by Daniel (Intona)
May 15th, 2020, 3:59 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

How does the noise of the 7055-B compare with the -C? The 7055-B is based on the same linear regulator as the 7055-C. Because the 7055-C needs to deliver more current for USB 3.0, it has two of those regulators in parallel. And doing things in parallel reduces noise. The measured noise is 2.5/3/6 µ...
by Daniel (Intona)
May 14th, 2020, 9:34 am
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

As I told above, truely comparable FFT plots need to reflect the noise density in root Hz. Luckily, there is a script available at Audio Precision's website that makes exactly that. There is also a very good explanation about interpreting noise in FFT data: https://www.ap.com/technical-library/fft-s...
by Daniel (Intona)
May 12th, 2020, 10:35 am
Forum: USB Isolators for medical application
Topic: ESD safety in medical applications
Replies: 2
Views: 266

Re: ESD safety in medical applications

And don't worry, it's just ESD...
[External Link Removed for Guests]
by Daniel (Intona)
May 12th, 2020, 10:32 am
Forum: USB Isolators for industrial environment
Topic: VBUS noise
Replies: 0
Views: 233

VBUS noise

There is some interesting measurement about residual noise of the isolator's VBUS output here:
7055-C noise measurements
by Daniel (Intona)
May 12th, 2020, 10:01 am
Forum: USB Isolators for medical application
Topic: ESD safety in medical applications
Replies: 2
Views: 266

Re: ESD safety in medical applications

And yes, we have an ESD gun in our lab and we love to help you to solve your issue.
by Daniel (Intona)
May 12th, 2020, 9:53 am
Forum: USB Isolators for medical application
Topic: ESD safety in medical applications
Replies: 2
Views: 266

ESD safety in medical applications

An always recurring question is how ESD safety can be achieved while maintaining isolation. One thing is that it is quite impossible for a single device for both maintaining 4 or 5 kV isolation and having a path for ESD strikes through the isolated worlds. There are solutions for this, though. One s...
by Daniel (Intona)
May 9th, 2020, 8:55 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

If you have any questions or want me to measure again some specific detail, just follow up on this thread.
by Daniel (Intona)
May 9th, 2020, 8:55 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Summary: I have shown that using the Intona 7055-C isolator, ripple and noise that come from the USB host is drastically reduced down to the microvolts range.
by Daniel (Intona)
May 9th, 2020, 7:58 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

If you are not familiar with logarithmic scales, I will show you this time the linear scale. That way you can see how dramatic the difference is. This is quite hard to show because there are multiple magnitudes of difference. Without isolator, at a scale of 150 µV (and pretty much overflowed): imac_...
by Daniel (Intona)
May 9th, 2020, 7:51 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Now let's connect a random, externally powered DAC and play an audio stream (UAC 2.0 isochronous, 48 kHz samplerate, 10 channels utilized with 1 kHz sine tone 0 dBFS). iMac to DAC without isolator. 7.9 mV @ 430 kHz BW: imac_audio_stream.PNG iMac to 7055-C to DAC. 40 µV @ 430 kHz BW : 7055C_imac_audi...
by Daniel (Intona)
May 9th, 2020, 7:44 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

At 22 kHz BW, the 7055-C has a residual idle noise of stunning 890 Nanovolts.
7055c_idle_noise_imac_22khz.PNG
Which is just 200 nV above the noise floor of the measurement system.
by Daniel (Intona)
May 9th, 2020, 7:39 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

At 80 kHz BW, the noise of the 7055-C is just 0.4 µV above the noise floor of the System Two measurement system:
noise_of_ap.PNG
(Inputs of measurement system shorted.)
by Daniel (Intona)
May 9th, 2020, 7:32 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

The bandwidth of the FFT plot is limited to about 80 kHz on this machine. So let's set the measurement bandwidth for the AC reading to 80 kHz, too.
1.9 µV.
7055c_idle_noise_imac.PNG
by Daniel (Intona)
May 9th, 2020, 7:27 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Now here is the noise profile of the Intona 7055-C connected to the iMac.
5.9 µV at 430 kHz bandwidth.
imac_7055c_dbu.PNG
by Daniel (Intona)
May 9th, 2020, 7:20 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Now let's have a look on to the noise profile of the iMac.
5.5 mV, not bad either.
imac_dbu.PNG
The iMac has the higher noise, so I pick this machine for further measurement.
by Daniel (Intona)
May 9th, 2020, 6:03 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Btw: the higher the bandwidth, the higher the noise of course. But that "> 500 kHz" on the System Two is inaccurate. I measured its "-3dB bandwidth" using the signal generator of a Picoscope that was lying around: bandwidth_analog_input.PNG Actually 430 kHz. So, the System Two offers selectable meas...
by Daniel (Intona)
May 9th, 2020, 5:58 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Here is the noise profile of the Rugged Science USB card of the Windows machine (plain output, no isolation). 3.5 mV is pretty good! Please note the red rectangles. The "Amplitude" is the RMS AC value that we are interested in. The "BW" shows the measurement bandwidth for this value. rugged_science....
by Daniel (Intona)
May 9th, 2020, 5:41 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

I have two USB host candidates available here which are known to me very well. The first one is my iMac (27" 5k 2019 model) that I use for common development tasks. The second one is one of our CAD-workstations running Windows 7. It is equipped with the highly professional Rugged Science UE-1004 4-p...
by Daniel (Intona)
May 9th, 2020, 5:08 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

This way, the power supply lines of any USB device can be tapped without breaking the shielding:
usb_to_ap.jpg
by Daniel (Intona)
May 9th, 2020, 5:06 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

To make a proper, shielded connection, a special USB-to-XLR tap probe has been build: usb_to_xlr.jpg The data lines D+/D- are untouched, the VBUS is tapped and tied to XLR pin 2, GND to pin 3. The shielding is wrapped, soldered all around to copper tape and to pin 1 and the shell. Of course, there i...
by Daniel (Intona)
May 9th, 2020, 4:55 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

Re: 7055-C noise measurements

Some words about how things are measured and what they indicate. I am going to measure residual AC ripple on the power supply lines at the USB connector. These are called +VBUS and GND, having a DC potential of 5 volts. The USB device may or may not use these lines to power itself partly or complete...
by Daniel (Intona)
May 8th, 2020, 8:11 pm
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

oslo wrote:
May 8th, 2020, 7:53 pm
1 meter.
->PM
by Daniel (Intona)
May 8th, 2020, 8:05 pm
Forum: USB Isolator and Audio
Topic: 7055-C noise measurements
Replies: 27
Views: 2030

7055-C noise measurements

I was asked several times if I can show facts about residual power supply noise of the 7055 USB isolator series. Well, measurements during the development phase were promising and now that production of the 7055 becomes mature, we are can carry on doing some serious characterization. Accurately meas...
by Daniel (Intona)
May 8th, 2020, 7:42 pm
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

Re: New rugged USB 3.0 cables: testers wanted

Which length do you prefer?
by Daniel (Intona)
May 7th, 2020, 3:15 pm
Forum: USB Isolator and Audio
Topic: Post your gear
Replies: 10
Views: 422

Post your gear

USB isolation can improve reliability and audiophile experience drastically. Or at least a bit. Sometimes it doesn't work at all. To make things better, it may be a good idea to know which combination you are using or you have tried and how it performed. Post your DAC, cables, isolators, filters, se...
by Daniel (Intona)
May 7th, 2020, 2:59 pm
Forum: Cables and Audio
Topic: New rugged USB 3.0 cables: testers wanted
Replies: 20
Views: 1034

New rugged USB 3.0 cables: testers wanted

We just made new USB 3.0 cables. Double shielded, full metal type and with isolated handles.

See lab photos attached.
Available in 0.2m, 0.5m, 1m, 1.5m and 2 meters.

If you want to test the cables, you are welcome to reply here.
by Daniel (Intona)
May 7th, 2020, 2:35 pm
Forum: POEsy Ethernet Switch
Topic: PoE powered switch that can power other PoE devices
Replies: 4
Views: 288

PoE powered switch that can power other PoE devices

Wanted: a small four port Gigabit Ethernet switch that can be powered by Power-over-Ethernet which in turn powers the next PoE device.

Multiple switches should be able to daisy-chain this way.

Anyone?
by Daniel (Intona)
May 7th, 2020, 2:26 pm
Forum: Ethernet Debugger
Topic: Observe CRC errors and interpacket gaps in Wireshark
Replies: 1
Views: 219

Observe CRC errors and interpacket gaps in Wireshark

Daily's work of making embedded solutions (don't say IOT), is fiddling around with Ethernet interfacing. Usually, you put a PHY chip or even a low-port count switch onto the board and connect this using RMII or RGMII to the microcontroller or FPGA. Then you usually do some low level interfacing and ...
by Daniel (Intona)
May 7th, 2020, 10:13 am
Forum: News and Announcements
Topic: Introducing the Intona User Forum
Replies: 0
Views: 435

Introducing the Intona User Forum

Well, it's 2020 and the world is agitated by the Corona pandemic. Amid social distancing, we felt that it is time to offer a new forum to our customers, users and friends. You are invited to read, ask, discuss and suggest at your leisure. Primary forum language is english and you need to register be...