New to the forums and the dso quad, calibration as far as the caps are concerned are spot on, DC offset is decently off, but ill calibrate that when I get to an adjustable power supply at school.
Anyways, my problem is that no matter what signal I try to measure (including from the generator), it doesn’t ever show the signals frequency, duty cycle, or triggering times, trigger points are all setup properly I believe, wont show frequency of ANYTHING. Is there something I’m doing wrong?
Alright so I took a video of what I’m talking about and some other bugs I think I noted
youtube watch?v=IzpYL-W9FoM
sorry but I couldn’t make it a link do to being new >…>
Depending on the app you are running it may be that you need to set the two time cursors to the start and end of a cycle. The display will then show the time difference and calculate the frequency.
There are four channels, and each has a color
Ch_A Blue
Ch_B Yellow
Ch_C Red
Ch_D Green
Button 3, the one with the dot symbol, toggles the little popup window.
The items you see there can be changed. Try to press and HOLD
button 3. A narrower window comes up showing the selected
items. Note that FRQ is shown in red. What could that mean?
Right, it is the frequency of the C channel. Move the < > switch to
the right to select the FRQ item. Now Move the + - switch and observe
that it loops thru all available parameters. Make it show FRQ again,
then press + - down. This selects the color = channel. Set it to BLUE.
Press < > to close the window. Apply a periodic signal to Ch_A, set
the trigger for a stable display and press button 3 again.
FRQ should now show the frequency.
Wilhelm
That absolutely worked, thank you very much for that.
Now, I also seem to have a problem with the displayed voltage going up with the scale as well with no actual input, also shown in video http://www.youtube.com/watch?v=IzpYL-W9FoM
and what’s the easiest way to calibrate without an already adjustable voltage source
Mine does the same. I am thru the calibration ordeal three times and the readings are a bit closer to reality now but that’s it. Even with the inputs to GND I get readings of up to 1 Volt, depending on range. If you have the new HW v2.72 be very careful not to exceed an input voltage of 25V. Some cal message says apply 50 to 60V. DONT! I used 20V as with the next lower range. I used a power supply and a good DVM as reference.
Please note that I am not an expert in any way as I have this gadget for less than a week now. Unfortunately the Community App and the Wildcat version don’t work an this HW version (yet?), so I am stuck with the v1.10 stock firmware.
Have you tried the Gabonator FW?