Products > Test Equipment

A review of the GWInstek 1054B

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maxwell3e10:
Here is a more proper test using a linear ramp. One can see gaps in the data, which are also in the saved waveform. I believe the reason is that in the firmware they do some vertical scaling while keeping only 8 bit numbers.

Another problem I found is that on high sensitivity scales it does not have true 8-bit resolution. For example, on 1 mV scale, all bit values are spaced by 3. So they simply rescale the values instead of increasing the analog gain.

In terms of responsiveness, I found the horizontal shift knob has rather large lag.

nctnico:
@maxwell3e10: I think your unit is somehow broken. Can you determine whether you are missing a specific bit in the ADC values?

maxwell3e10:
It is a specific value missing, but it changes depending on how many channels are being recorded. I have a bit more info in this post.
https://www.eevblog.com/forum/testgear/missing-bin-values-in-gw-instek-gds-1054b/
I am more inclined to think its a firmware problem or perhaps firmware calibration is compensating for an analog defect.

nctnico:
Just return the unit and get a replacement. I'm very sure this is a defect (there is a bit stuck somewhere) and not a bug in the firmware. If it where a bug it would have been found & reported long ago.

saturation:
Great, will give it a test and will report back.  What firmware are you using on the unit?




--- Quote from: maxwell3e10 on February 17, 2018, 07:03:55 pm ---Here is a more proper test using a linear ramp. One can see gaps in the data, which are also in the saved waveform. I believe the reason is that in the firmware they do some vertical scaling while keeping only 8 bit numbers.

Another problem I found is that on high sensitivity scales it does not have true 8-bit resolution. For example, on 1 mV scale, all bit values are spaced by 3. So they simply rescale the values instead of increasing the analog gain.

In terms of responsiveness, I found the horizontal shift knob has rather large lag.

--- End quote ---

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