Products > Test Equipment

SIGLENT SDS1102CML - First Impressions

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johansen:

--- Quote from: Deckert on October 08, 2013, 04:54:43 pm ---
--- Quote from: johansen on September 19, 2013, 09:18:42 am ---at 500MS/S per channel , it should capture 25 samples per division per channel.
not so. in fact, you might be able to say it is capturing 10 data points per division, or it can't tell the difference between the LSB.

--- End quote ---
Verify that by checking the Acquisition menu and placing into DOT mode.

--- Quote from: johansen on September 19, 2013, 09:18:42 am ---note the decay rate and you should see something is seriously wrong.

--- End quote ---
What should it be?
--deckert

--- End quote ---


I was likely not very clear.
by decay rate i meant the decay rate of the 50Mhz ringing on the drain waveform (20ns period)
you'll notice it isn't forming the usual logarithmic decline.
instead, it appears to be sort of "sustained"
by my estimation, the blue trace should reach all the way to 60 volts, instead it is sort of clipped at 55.

also, the DV/DT of the blue trace changes at about 48 volts.. i've never seen such with similar circuitry and analog scopes.

when i have some time i'll have to compare this scope with something 50 times the price..
and yes i changed it to single channel and the sampling, etc, it doesn't seem to "go any faster"

edit, in both of those captures, the dv/dt is indeed changing once the drain gets to about 48 volts, about 20ns before the fet fully turns off and the gate voltage starts to drop again... hmm...


edit2: at 250ns per division and below, the scope claims 500MS/s for two channel
at 50ns/div and below, its 1Gs for one channel, 500Ms for two.

i'll have to investigate this weird stuff further, there's "plenty of dots" even at 500MS/s and two channels.. it should show what's going on a bit better...

hgg:
Hi to all,

After some months of use I would like to state the most annoying things about the specific oscilloscope.
In general it is a very nice scope and if they fix the following in a future firmware it would be excellent
for its price range.

1) The most annoying thing its the way it displays the measured data on the right.  They list all the labels
and data with the same colour size and font!  They have not even bothered to change the font colour
depending on the channel you are monitoring.  You are not using the scope to look at nice waveform.
only.  You are making measurements as well.  Its very confusing to locate the value you are watching,
if everything has the same colour font and size.  They took the time to implement different color themes,
and left out that 'minor' detail'.  How clever is that!?  What were they thinking ?  |O
(they should also let the user use smaller fonts in order to fit more measured values)

2) The other annoying thing is the sluggishness of the trigger and position adjustment knobs.  Its like
playing a game when you try to centre on a value...  You have created a scope of 1Gsa/sec and you
cannot move a single line cursor with a respectable speed.  Nice.

3) They are using the same colour for the waveform and the cursors.  This is not so annoying but they
could have done better.  Ok, don't use a different colour, but you can at least use a darker or lighter
shade to make them more visible.

Finally the only firmware bug that I have found concerns the USB stick.  If you leave it plugged in and
switch off the unit, it will not recognize it at power on.  You have to remove it and reinsert it. 

Its seven months now and I have not seen any firmware updates.  Not sure if they will ever release
any...but If they can fix these minor details (especially the first one) it will make it a great option for
the beginner in electronics and at a great price.

Hydrawerk:
Well, nothing serious when compared to Tektronix TDS1000 / TDS2000 scopes...

copperwings:

--- Quote from: zoltan on September 09, 2013, 07:11:50 pm ---The very first annoying thing i've found is that the damn thing won't remember the language setup. It will remember the channel choice etc. but not the language.

--- End quote ---

Hello friends! this is a simple matter of reloading the config file (not the FW). Had the same (minor) issue (same HW and FW version as yours). Latest firmware along with config file needed can be found here: http://siglent.freeforums.org/new-fw-for-sds1000cml-and-cnl-t77.html

cheloski:
hello to everyone.... I am using my new Siglent 1102 CML for one week , and today when I power on the oscilloscope , it show me the screen of presentation like always (where say Siglent 1102 CML....) , but later the screen turn in white , and stay frozzen , like trying to charge the software......do you know if this happen before to other person?....or what to do ?....I sent a mail to Siglent , and I am waiting the answer..... I appreciate if someone can help me......thanks for your help....



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