Author Topic: The Summary Siglent SDS1202X-E Thread  (Read 10508 times)

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Offline rf-loop

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Re: The Summary Siglent SDS1202X-E Thread
« Reply #75 on: February 08, 2018, 06:55:07 pm »
Hello! Who knows what is new option "Utility->page4->Reference Position-> Vertical fixed position and Horisontal fixed delay? Before update these options were absent. Tried them on and off - nothing happened

They are least partially explained here by @Performa01
(This is for 4 channel models but as we know 2 channel models are very similar in many basic things)

And in this thread 1. message there is downloadable pdf. In this part 1 he explain it.
SDS1104X-E Review 01.pdf

In practice after user have learned and adapted to use these features then can feel that how we can live without these.

Tiny example (vertical)
You are looking example DC power supply ripple. Without this feature (fixed offset) always if you change vertical V/div scale you need adjust vertical position because this signal (ripple on DC) position on the screen change because your "zero" is in fixed position. With some settings you need really adjust until your fingers fatigue.  But with fixed offset voltage,  changing  V/div setting it (ripple signal riding on this DC) stay in fixed offset voltage on the screen without need adjust position if change V/div.


Take 1.5V DC. Connect it to input and input coupling mode DC (if use AC you can not see low freq ripple/variables, 1/f noise)
Probe 1X
Push position for zero to center line (if it is not allready)
Set input for 500mV/div
You see DC line 3 div up from 0 line.
Now you want look this DC more deeply for ripple etc.
Go to utility menu 4/4 and there select "Reference Pos"
Then select "Vertical, Fixed Offset"
After then select what menu you next want go or stay there.
Now turn vertical "Position" knob until your DC signal is middle of screen, also you see on channel display (righ side of display) there is -1.50V (offset)
Now change V/div to 200mV/div - 100 - 50 - 20 - 10 - 5 - 2 - 1mV/div
(if need push trigger position knob for "center" trig for p-p)
Next part of exercise tell why I say this: Your fingers thank and your boss also thanks because you can do more works with less time.

Now do this same exercise next part:
do not select  "Vertical, Fixed Offset". Select "Vertical, Fixed Position"

Then also start changing V/div from 500mV to 200... now adjust vertical position so you see signal around middle of screen... then go to 100mV and again adjust.... then 50mV/div and adjust position.... then 20mV and adjust position....continue down until your fingers are tired-fatigue try continue exercise down to 1mV/div or even down to 500uV.
If you feel fingers very tired or even joints pain,  stop the exercise.

After this exercies you know it really do things and after then you do not say "it do nothing".
If you do this exerciese down to 500uV/div perfectly all steps you remember this setting and know how useful it is your rest life.
« Last Edit: February 08, 2018, 07:03:56 pm by rf-loop »
If practice and theory is not equal it tells that used application of theory  is wrong or the theory itself is wrong.
It is much easier to think an apple fall to the ground than to think that the earth and the apple will begin to move toward each other and collide.
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Offline Siglent America

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Re: The Summary Siglent SDS1202X-E Thread
« Reply #76 on: February 09, 2018, 05:55:58 am »
Hello! Who knows what is new option "Utility->page4->Reference Position-> Vertical fixed position and Horisontal fixed delay? Before update these options were absent. Tried them on and off - nothing happened

For an explanation of the horizontal / vertical fixed position functions you can check this out:
« Last Edit: February 09, 2018, 06:00:01 am by Siglent America »

Offline borjam

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Re: The Summary Siglent SDS1202X-E Thread
« Reply #77 on: February 22, 2018, 07:57:36 pm »
New firmware for the SDS1202X-E

Version: v5.1.3.17R1
5.9 Mb
Maybe you remember that I pointed out some serial decoding problems. After updating the firmware I have taken some samples in the same setup I used before, and seems decoding can still be somewhat confused.

This is not a typical RS232 link, but a RS485 bus with the Modbus protocol. That means that the idle signal doesn't have a voltage level as it happens with RS232, but it's 0 volts with all the nodes in high impedance mode.

Some samples attached. The data is not sensitive so I can supply a binary capture file if needed.

In my case this is not a show stopper but, certainly, there's room for improvement. As a matter of fact a DS1074Z from Rigol decoded perfectly in the same setup. I still trust the Siglent better because I don't like the interpolation circus in the Rigol, but it would be nice to improve the decoders a bit.


Online tautech

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Re: The Summary Siglent SDS1202X-E Thread
« Reply #78 on: May 06, 2018, 09:54:42 am »
Some audio checks with SDS1202X-E FFT from Rob's Fixit Shop:

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