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A review of the GWInstek 1054B

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maxwell3e10:
It came with version 1.18

saturation:
That's essentially the best and latest, and the one I currently use too. v1.19 the only difference in the changelog is supported languages.


--- Quote from: maxwell3e10 on February 18, 2018, 03:23:40 pm ---It came with version 1.18

--- End quote ---

anilnediyara:
First of all let me thank Saturation for this long thread on 1054B.  I am looking at this scope and GDS1102B for use mainly in audio amp service and 3phase VFD.

My question is which one will be better for each application. The faster FFT analysis of this scope looks impressive for checking the harmonics of VFD's.

saturation:
You're welcome.  I think this thread exists by accident as there is no one else discuss the 1000B series.

IMHO issues that may affect your choices:

1000B is suited as a bench instrument and has no protection for power electronics use.   Its natively a CAT 1 device.  While it can help troubleshoot 3 phase VFD but you will need isolating the front end with a HV differential probe, which can cost as much as this low cost DSO depending on the frequency and rated voltage

The chassis is easily transported, but may not survive one drop to floor from 3'

FFT has ~ 50dB noise floor due to 8 bit resolution

FFT pick up spurs generated by the DSO, e.g. its SMPS or the internal clock, they are a constant so you can figure out which spurs are artifacts, spur amplitude can varies as you set the FFT

My 1054B is not rated by an electrical safety organization such as UL, ETL or CSA

IIRC, the DSO in the 1000B series are identical make except for the -3dB frequency response and available channels.  However you can see the lowly 1054B can gives useful response to ~80MHz with 4 channels on.

Any 1000B can help audio applications, but audio specifically the "50MHz" 4 CH version is more than adequate




--- Quote from: anilnediyara on February 18, 2018, 05:00:52 pm ---First of all let me thank Saturation for this long thread on 1054B.  I am looking at this scope and GDS1102B for use mainly in audio amp service and 3phase VFD.

My question is which one will be better for each application. The faster FFT analysis of this scope looks impressive for checking the harmonics of VFD's.

--- End quote ---

saturation:
I can recreate your issue and will post a photo later, so concur with your result, I think you have found an anomaly or if it was on purpose, an economizing measure.  It would be interesting to see if the same artifacts occur on the 2000 series  using the Zynq platform.

I have always wondered if the gaps were wfms/sec related but they are independent of the memory depth or the sampling rate, so its occurring during data acquisition phase.




--- 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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