Products > Test Equipment
A review of the GWInstek 1054B
saturation:
Comparing dot vs vector modes. Using dot mode reduces or removes bias in measurements caused by the Sin(x)/x interpolation. 'Gating' means automated calculations are based on the screen contents, when "OFF" calculations are on the entire input buffer. 80 MHz was selected as the test frequency as this was the highest frequency where the error at 250MSa/s using automated measurements at gating off, produced the least error versus 1GSa/s.
Baseline for all comparisons. 1GSa/s 80 MHz vector vs dot mode and against manual measurement. Here I used gating to screen.
500MSa/s 80 MHz vector vs dot mode and against manual measurement. Here I used gating to screen.
250MSa/s 80 MHz vector vs dot mode and against manual measurement. Here I used gating to screen.
Comments:
There is little difference between measurements made between dot and vector modes. Automated measurements concur very well with manual measurements when using gating to screen, since manual measurements are only based on screen data.
At 250 MSa/s, the lower sampling rate increases the measurement error, compared against the baseline 1GSa/s. To reduce this error use 'gating off' which then uses the entire buffer contents to calculate values, increasing the data size for analysis. As shown in the prior post, this causes the difference between 1GSa/s and 250MSa/s rates to be substantially reduced.
saturation:
Yes, this thread exists just because there really isn't anyone else on the net making a detailed review. If someone better came along, I would link this thread to it and move on.
There are many good videos and documents about basic DSO function. It'll help to review them to make an informed decision.
Rise time is a standard measure developed since the 1940s the only difference today is whether it begins say in DC, from 0V + 10% and ends at 90% of peak or 20% and 80% or other end points. It can be understood in a simple way or it can get very complex.
https://en.wikipedia.org/wiki/Rise_time
The 1000B series was torn down in detail by Dave and can be found in the eevblog forum. Details of it working can be found in the datasheet of a Hittite HAD1511 ADC particularly in relation to interleaving, and the main CPU is a Zynq Z7010 SoC. Enjoy.
--- Quote from: MrAl on February 07, 2017, 04:58:53 am ---Hello there,
I see one thing in particular that is interesting but not sure how exactly to interpret. The rise time test showed about 3.8ns and i wondered what setting the scope was on to get that. I noticed some of the scopes have a 1ns setting, so i wondered if we could get a raw ADC view on the scope. If in fact they use a true 1GSPS ADC then we should be able to see, somehow, about 0v at say 10ns and say +5v at 11ns (10ns plus 1ns). Is that the way these DSO's can work, or do they obtain that 1GSPS sampling rate by doing several scans of the same waveform coming in in real time? Or, do they do some intermediate work on the wave which would bring it up to 4ns instead of 1ns? BTW what is that scope rated for in rise time?
I am hoping that they use a true 1GSPS ADC chip of some kind combined with fast memory when they advertise as 1GSPS of course.
I am rather new to the DSO's as i had and have used many CRT scopes in teh past including 10 thousand dollar CRT storage scopes, but only used two DSO's so far and only for a short time, so i dont know much about what to look for and what to watch out for.
Thanks for any additional info like this.
--- End quote ---
saturation:
News:
Mid-May 2017 Tequipment.net stocked 55 1054B and today it had 14 remaining.
Its also sold on Amazon at the same price as tequipment, so maybe it the source.
https://www.amazon.com/GW-Instek-GDS-1054B-Oscilloscope-4-Channel/dp/B011IFQUQ8/ref=sr_1_1?ie=UTF8&qid=1498244799&sr=8-1&keywords=1054b
There is also a marked increase in the total number stocked by tequipment for other 1000B models
http://www.tequipment.net/Instek/GDS-1054B/Digital-Oscilloscopes/
The increase of unit sales/week was about less than one a week in 2016 to ~ 1.5/day in YTD 2017 for the 1054B.
nctnico:
--- Quote from: saturation on June 23, 2017, 07:20:29 pm ---News:
Mid-May 2017 Tequipment.net stocked 55 1054B and today it had 14 remaining.
--- End quote ---
Make that 4 remaining!
saturation:
Yes, checking today from Amazon stock 9/17 remaining since I last posted. Its unlikely Tequipment as the seller since their remaining stock is far lower.
For 1054B, 3/4 since your post
1074 no stock
1104 1/20 remain since your post
Given the Siglent DSO using Zynq and the issues discussed on the thread it shows how well the GWInstek managed their version.
Not much more to post on my end as the DSO just works, and at this time no bugs to complain out, no new firmware for this model YTD, last is 1.17 en 22.1 MB 2017/03/17.
--- Quote from: nctnico on June 23, 2017, 07:42:48 pm ---
--- Quote from: saturation on June 23, 2017, 07:20:29 pm ---News:
Mid-May 2017 Tequipment.net stocked 55 1054B and today it had 14 remaining.
--- End quote ---
Make that 4 remaining!
--- End quote ---
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