engi

However strange. Display Port is a valueable thing because free of charge. Maybe this is the reason for removing it? XI offers the HDMI for purchase :-)

Why is the ringing only at the high level? Is there an impedance matching issue?

When first starting the AD2 recently I though it was dead because I did not see a reaction. Now i discovered a heavily flashing green LED when look from aside into the plastic housing. Is that ok that way? I did not find anything mentioned about that in the docs.

Hm, I got stuck with this issue too at first - later i managed that. As there are many login protections in the net which are really much worse than that , i am quite ok with that one in here. However I am with you that it is really frustrating! What some "programmers" and "webdesigners" consider reasonable to install as a "protection" is nothing more that user distraction. They mostly have not the brain to look forward to possible issues and traps because most of these guys have chaos in their brain. I have to deal with their "output" every day! When I get stuck to long I tend to sent a preprepared letter (as a paper!) to the company. I already complained at a CEO about a guy's nasty support and asked him if he himself is able to supply the data sheets of the products I was seeking for. Well, finally they reacted. :-)

Wasn't there an issue with the Transceivers' PLLs and stability in the A7? I have something in mind like that. Generally DP works with Kintex e.g. (proved)

Separate Apps would be ok, since I intend to use one as driver for circuit and another for analysis of outputs. Fine so far. When being back from business trip, I will try it and report. The two devices appeared already :-)

hm, if wavegen and digital input of the scope (an ADC?) are running in the same FPGA, this should only be a register at the output to be read, or am I wrong? Which FPGA is used for the AD2?

Could it be possible (in theory) to use the analog inputs and interpret them in an appropriate way? A low pass filter and a difference (subtraction) should give a more or less "digital" signal zu interpret it.

Is is possible to run and control more than one devices of Analog Discovery THE SAME TIME with one PC - using one application?

The interesting was to setup a specific FIR for extracting a particular frequency. I have such a project at the moment. However, it is ok.

Interesting subject. I am going to use AD2 for audio too, whereby I wonder about the quality of input noise. Generally I would go with a good sound card or a professional device. Also for the microhones i suggest a noise free pre amp with a good and noise free 48V phantom power. Me I am going with RME' ADI Pro and fireface. For Audio analysis I use ARTA, and selfbuilt gear. Regarding AD2, I wonder about the linearity of the frequency curve. (?)

With an Artix it is possible to treat UHD at 297MHz, most probably not with an analog VGA:-) In the example above, I am using 148.5MHz for HDMI, which is already pretty high for analog purposes. With a Spartan I also used 148.5 and also 162 to drive 1600x1200. The issue here is the monitor which only prints nice at 1920x1080, so there is no other choice at first glance. With a different timing scheme it might be possible to go with almost 200MHz, but did not try this. See the table below. https://www.mikrocontroller.net/articles/Projekt_VGA_Core_in_VHDL

Is is only averaging by mean value, CRC or is there also a weighted calculation with FIR possible?

I checked the alignment and some wrong CCs wont do much harm ecept of an image shift. The issue I was describing above was indeed the missing active area treatment: When stripping down the example, I simply did not blank the VGA outs correctly. However I will check the alignmet again - but according to a test I did in the meanwhile (using a frame of 1 pixel width) this is right. Here is an example of a vid pattern (ARTY 100, PmodVGA placed at ports B+C) vga_pattern_test.zip

You can try to add and alter substract noise (or use a noisy DSC) in order to flatten the noise spectrum. Focussing on audio one can reach up to almost a 16 bit quality for music signals following pink noise spectrum. Calibration of the input behaviour has to be done too (Schmitt Trigger issue).