Products > Test Equipment

A review of the GWInstek 1054B

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whited:
Yes, only a couple daydreams ago I was convinced 1054B was for me. And now I have this nagging feeling about memory segmentation and logic decode from full memory  |O
But if price is plotted reasonably, on log scale, with a few beers... maybe it's happy holidays as you say.


--- Quote from: saturation on December 16, 2016, 08:02:54 pm ---The 1054B is <$366 street price via Tequipment not including the eevblog discounts and possibly other promotions.

At the published bandwidth and list price they are about the same proportion, 50 MHz vs 200 MHz is still 4x more at 4x the price as well as serial decodes and segmented memory.

However, its in the extreme end, the usable bandwidth were you can get more.  Its likely to still go past 500 MHz based on the curve slope at its more sensitive vertical amp setting.

So the big question is do you need that much bandwidth to pay more for it?  Or in the end its all part of happy holidays? :-+



--- Quote from: whited on December 16, 2016, 04:40:59 pm ---Saturation, I have a little more time now to see your numbers; seems 1050B has ~70 MHz bandwidth instead of its rated 50 MHz. It is not too surprising but nice to see in a budget scope. I wonder if all GDS 1000B and 2000E have similar conservative bandwidth rating?

Maybe ntcnico can give another datapoint on frequency response? ntcnico I read your review thread; I hope I didn't miss it. Nevermind I found it here on post #67 https://www.eevblog.com/forum/testgear/gw-instek-gds2204e-(200mhz-4-channel-dso)-review/?all
It's a good measurement showing 2204E roll off (rated 200MHz bandwidth)
-3dB @ 290MHz with 50mV/div, more steep curve
-3dB @ 210MHz with 10mV/div, more gradual curve

I am personally thinking 2070E is a sweet spot @ $920... but 2204E is so close @ $1256. Can I convince myself? :)
I know this is a 1054B thread - I try to keep it relevant.
Thanks to you all.


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saturation:
Single rise time,  Pulse waveform from Tek 284 rated at 70 ps, 50 ohm termination




Stats while in STOP mode



Snapshot of live buffer calculated rise time, in RUN mode





--- Quote from: saturation on December 16, 2016, 03:36:02 pm ---Sorry, mea culpa, I have them but didn't have time to take it out; will replace that photo with the screen grab.


--- Quote from: tautech on December 16, 2016, 02:25:41 pm ---A screenshot captured on a USB stick is much more helpful and clear for those following than something like this:
 :--

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saturation:
Some added performance tests accumulated over the past holidays using a "calibrated" RF generator HP 8640B.  The 3B point of the 1054B is about 120 MHz versus my prior conservative test.



This is the maximum usable frequency of the unmodded scope.  At near n/2 at the Nyquist limit the onboard counter quits just over 400 MHz then waveforms are wholly unstable at 430MHz.   Down - 30dB.



IMHO, the practical limit of the scope, Down - 23dB.  This is were all the math functions and on board calculations still are accurate and stable.  YELLOW single channel, 363 MHz.  Red math channel calculating derivates of CH1.  Note Vpp and calculated RMS value, rise time of 821ps,  Cursors are measuring rise time manually at 10-90 which is 1.15ns, or by 0.35/Tr ~ 304 MHz or 426 MHz using the automated rise time.  Calculations were unstable on ungated mode, so these are based on using the 1054B gated to screen mode.



The stat function of the 1054B to show the level of stability at 363 MHz.



Close up of 1054B doing derivate of CH1 in real time.  It will calculate cleanly even at 1kpts.  Derivate of sin(x) is cos(x) but while the appearance is correct the phase shift is a bit prolonged.



Close up of the derivate of the rise time.  This is also called the Dirac delta function.



Live 2 channels and math channel.  Source is a Tek 284, Yellow CH1 is the pulse output and Blue CH2 is the trigger output, they are delayed by 5ns as shown on the cursors. 


saturation:
New firmware released, untested by me.  The changelog suggests a number of bugs I did not report or experience.  Gwinstek now includes a changelog copied here:


Version 1.08

1.Fixed the system crash randomly which caused by the ¡§Advance Math¡¨ function
2. Fixed the displaying issue of XY mode under certain circumstances
3. Fixed the time base error when the ¡§AUTOSET¡¨key pressed under ¡§Window Zoom¡¨ mode
4. Fixed the AD malfunction under certain circumstances

Version 1.09
1.Added German & French icons and help menu
2.Adjusted the maximum value of the waveform brightness


Version 1.11
1.Added Korean icons and help menu
2.Added Russian icons
3.Fixed the residue waveform issue
4.Fixed the system freeze bug after the QR code menu activated
5.Added the DVR calibration under distributor mode

Version 1.12
1.Added Russian help menu
2.Fixed the initial value for the ¡§Advance Math default¡¨ expression
3.The output polarity of the Go/No-Go has been adjusted which same as the GDS-2000A series

Version 1.13
1.Fixed the Trigger Filter bug.

Version 1.14
1.Changed the display method for waveform interpolation.
2.Fixed the pictbridge's connectivity issues.
3.The Trigger out function is activated now. (Press UTILITY -> Probe Comp. -> Frequency)

Version 1.15
1.Add Multilanguage: Spanish

Version 1.16.001
1.Fixed the trigger level offset issue, if the vertical position was shifted out off the screen range.
2.Fixed the ¡§Advance math¡¨ algorithm which caused the system crash.

Version 1.17.001
1.Added USBDelay command in order to solve the USB data leaks for WIN10.
2.Fixed the ext trigger of roll mode which may cause the system crash.
3.Fixed the zoom state malfunction for horizontal position command.
4.Changed the value range of trigger hold off command: the minimum value changed to 4ns from 10ns.

Fungus:

--- Quote from: saturation on February 05, 2017, 06:18:57 pm ---1.Fixed the system crash randomly which caused by the ¡§Advance Math¡¨ function

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 No comment.  :popcorn:

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