HansV

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HansV last won the day on September 12 2016

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  1. Fantastic!

    Thanks for the changes in version 3.5.4 it is absolutely fantastic !! Just a few years ago you needed 12 equipment racks of 2m50 high and more than 2000 vacuum tubes and the required air-conditioning to achieve all of this .......(If it was possible at all).
  2. Although I flaunt here with other people's feathers it seemed to me a nice topic for the forum. I love practical examples for the Analog Discovery 2. I think this mix of old school technology with modern technology is fascinating, don't you think so? If you don't want this on the forum feel free to throw it off with confidence. Greetings, Hans
  3. Temperature System Monitor

    Nice! Thx.
  4. Hi, Can i use the temperature from the System Monitor (AD 2) in a Java Script? I can't find the answer in the script-help or the examples in the SDK. Thanks in advance, Hans
  5. A unbelievable nice device as the AD 2 deserves better than this (we should maintain the lead on Tektronix (lol)) so I tried to find a workaround to compensate for the temperature drift a little. For this I offer one channel (in my case C1) as temperature offset (temperature curve in mV), then I add in a script negative values (which i make first positive) from C1DC to C2DC OR i subtract the positive values from C1DC from C2DC. Remember C1DC (shorted input) represents the temperature deviation. I do this with this little script in channel C2DC if (C1DC <=0) {C2DC + Math.abs(C1DC)} else {C2DC - C1DC} As long as C1DC <= 0, make the number positive and ADD it to C2DC, else SUBTRACT C1DC form C2DC. You need to use the same range in both channels and remember that you have that script in one of the channels otherwise if you connect a positive voltage to C2DC the trace goes down! or it goes up if you connect a negative signal! This example works for positive signals on C2. At least i have one channel now that i can use in the +mV range. There is a lot to say about this method because it is based on a assumption of similar temperature drift in both channels, in fact you see the difference in this plot because i compensate C2DC with the data of C1Dc in math but it's still not complete straight, but the output is much smoother than without compensation. Moreover, I am not a specialist in Java script so ( i come form the Basic time) perhaps it can be fixed more easily, i love to hear it in that case and or other suggestions. Someone who is good in Javascript can store the temperature curve of a specific AD2 (item in the calibration?) in an array and then use it on both channels positive and negative. Thanks! Hans. The corrected result watch for the difference......both channels (C1DC and C2DC) are in the 100 mV range, just as in the other picture above. Of course you can use the 5V range as Atilla suggested, but i like always to be in the more sensible spots..... temp drift 10V range with correction.txt in the left column you can find the temp curve translated to mV from my device, of course this can be done with much less points.
  6. Thanks for the quick answer.....
  7. Hi all, I struggled for a while with unexpected DC outcomes from the datalogger. After research I found a DC temperatuur drift error. I think this affects the oscilloscope and voltmeter tool as well. If you watch the attached picture you see a 2 hour record of a 3,3V DC channel (1) and a zero volt (shorted) channel (2). You see a temperature / voltage drift in the range from -38,75 mV by 22 °C to + 2,4 mV by 43,75 °C. The only point where this drift is zero is after 1 hour. For me this DC drift makes the mV range useless and even in the Volt range i have to wait an hour before i have more or less reliable results. The fact that the Range setting in the settings pull down menu is by default on maximum and does not get saved with the workspace, gives always the maximum error for any certain point in time, I made this record with the 10V range in the settings pull down, if it was on the default maximum it was much worse, both channels are in the 100 mV range. Calibrating the device after one hour makes no difference in the temperature dependency. Perhaps this is only the case with my device but that's why we have a forum isn't it? Now my question, where am I wrong? Thanks in advance, Hans.
  8. Inserting scalable pictures?

    "have the relevant colors in the text that do disappear in the label option" If i paste a sketch (made in Mpide) in the label functionality, it makes the text black or white (no colors) while sketches have relevant colors so this label-tool is not suitable ; you would like the images/labels to be layered so that when they are inserted, they go behind the existing trace this is what i mean yes.
  9. Logger traces plot width

    Atilla thx for the answer i feel a bit stupid that i didn't know that. Thanks. Hans
  10. Hi, I love the analog discovery as learning tool. I feel the need to add more information by the measurements. Sometimes pictures (see attached pic) sometimes text (sketches, to show the executed program results, i can put the sketches in labels but the have relevant colors in the text that do disappear in the label option ) in waveforms. It would be nice if the pictures are inserted in the black background so the traces can go over them in the foreground. I don't know if i am the only one with this wish, in this case feel free to put this question in the trash. Thanks in advance, Hans.
  11. No big priority, but perhaps an improvement for next versions? As you can see in the attached pic the channel traces have different plot width (at least on my system) even when I use the same colors. Not a big thing but I thought perhaps a improvement for future versions? Thanks in advance, Hans.
  12. Logic buffer tabs

    Hi, For those wo want to use this Tab functionality now, this functionality works (as i use it) in Waveforms 2.4.9 wich i installed along version 3.4.7. Hans.
  13. Logic buffer tabs

    Hi, I try to use the buffer tabs in the logic application for different acquisitions. example; acquisition2 (Tab 1-timebase 61 us/div) temperature registers (in this case). acquisition3 (Tab 2-timebase 376 us/div) all registers overview. But if i make acquisition 2 with a timebase of 61 us/div and make a new Tab (+button) for acquisition 3 (376 us/div) and make a Single shot, the program changes the timebase in my previous made Tab 2, too. What is the use of these Tabs if this is the case? Thanks in advance, Hans.
  14. Hi, I love the time_date_Discovery 2 stamp on exported images. If there comes a new version of waveforms 3.4.7 is it possible to add one line to it? now we have; comments, Device, Serial Number and Time I want to type my name and projectnumber in that box too.