| Products > Test Equipment |
| All about Keithley DMM7510. Bugs and features, recipes, advice, notes. |
| << < (10/26) > >> |
| MegaVolt:
Unfortunately, this is a frequent occurrence for this device. Any deviation from the correct path can lead to glitches which can be eliminated only by rebooting :( |
| MegaVolt:
--- Quote from: MegaVolt on April 13, 2020, 11:58:19 am ---The device allows you to set up a fractional aperture; maybe it works; maybe not. I haven’t figured it out yet. --- End quote --- I checked the ability to install a fractional aperture. Unfortunately this does not make sense. In manual mode, the aperture can be a multiple of 1 μs and nothing else. Fractional aperture only becomes in AUTO mode as I described earlier. If you want to get a signal suitable for FFT processing, I recommend setting it to either 1µs mode or AUTO mode. In this case, the AUTO mode averages several samples, which improves the signal-to-noise ratio. Of course, remember that the device has a wide band and if you have not limited the frequency of the signal, then you will get frequency aliasing. |
| MegaVolt:
New Test Script Builder released. https://www.tek.com/software/testscriptbuilder/kts-850j05 |
| essele:
I've just updated another item I've logged on the Tek support forum... https://forum.tek.com/viewtopic.php?f=363&t=142266 Its basically saying that, as the graphs start to cover longer time periods, they seem to round the data values and have quite a signficant loss of precision (although there are strange anomalies where this doesn't appear to happen.) I seem to be talking into a void on the other forum (although did get a response on one of the temperature issues) but thought I'd include it here for completeness. More detail is in the other forum, but basically I've taken the same (almost) data and bucketed it into 300 buckets (storing min and max) and then plotted using excel, so this is assuming they have 300 pixels to display the data on the screen, and this is roughly what it should look like... But on the 7510 it actually looks like this... .. clearly awful. |
| Kleinstein:
The reduced resolution is really odd. There may be reason to use reduced resolution for intermediate data to save on the memory - though still odd, as 1 µV resolution would be more than 24 bits and 32 bits would give enough resolution. So it looks like another small points of sloppy implemented graphics software. There is another not so nice feature that was noted before: the grid lines are 1.1 µV apart, which is an odd choice. At least it looks like exactly 1.1 with no extra rounding error at the labels. |
| Navigation |
| Message Index |
| Next page |
| Previous page |