Siglent SDS2000X Plus

[tv84]

Looking at the back side, it definitely would be an engineer's work of art embedding a VESA there...

[tautech]

Looking at the back side, it definitely would be an engineer's work of art embedding a VESA there...

There is the Kensington lock...... 

[tv84]

There is the Kensington lock...... 

Doesn't provide sufficient fixation to allow operation...

I think the best way would be feet replacement with a custom solution locked on the shelf.

[thinkfat]

Use a mouse.

[thinkfat]

There is the Kensington lock...... 

Doesn't provide sufficient fixation to allow operation...

I think the best way would be feet replacement with a custom solution locked on the shelf.

You are just looking for an excuse to buy a 3d printer.

[tv84]

You are just looking for an excuse to buy a 3d printer.

Damn, you're good!

[Martin72]

For the problem with the viewing vertical angle lecroy got ta simple but effective solution.
The feet are not just for folding up, but can be rotated depending on whether the scope is to be tilted backwards or forwards.
Hope that siglent will follow this simple and "cheap" principle one day.

[tv84]

The feet are not just for folding up, but can be rotated depending on whether the scope is to be tilted backwards or forwards.

That's exactly the idea I had for the Siglent although one has to take into account the center of mass...

Well done LeCroy! 

[tv84]

Don't know if you already seen this in the 1.3.9R10 release notes:

Code: [Select]

3/8/2022 1.3.9R10 Compatible with new hardware (hardware version: 04-xx).
Note:
1. This is a firmware compatible with new hardware. No feature or specification difference between it and 1.3.9R6. It’s not necessary to
upgrade it from 1.3.9R6 to this release.
2. This release cannot be downgraded to former releases.
I would say Siglent has had to change the inside HW due to chip shortage... 

[blurpy]

Yes that looks like what happened. There is a new bitstream:
acq_mso_fpga: 7a200tffg1156 - Xilinx Artix-7 XC7A200T

From the naming of the file, could it be replacing all these Spartan 6 FPGAs from the original hardware?

• mso_fpga: 6slx16ftg256  - Xilinx Spartan 6 LX16 XC6SLX16-FTG256
• acq_fpga1: 6slx45fgg676 - Xilinx Spartan 6 LX45 XC6SLX45-FGG676
• acq_fpga2: 6slx45fgg676 - Xilinx Spartan 6 LX45 XC6SLX45-FGG676

Also new file called update_config, with the current firmware version. Could be for the new firmware downgrade protection, but not sure why since the version is embedded in the app anyway. Perhaps for some future scripts?

[tv84]

Also new file called update_config, with the current firmware version. Could be for the new firmware downgrade protection, but not sure why since the version is embedded in the app anyway. Perhaps for some future scripts?

Also saw that. I agree with those suppositions.

[ozkarah]

I managed to backup firmware, configuration, and other files from my new SDS2104X Plus scope.
For the people interested, I am sharing the procedure below:


1.   Format a USB stick with FAT or FAT32 file format.
2.   Copy the file attached to the USB stick and rename it to "siglent_device_startup.sh".
3.   Connect the scope to your network using an ethernet cable.
4.   Put the USB stick into the scope.
5.   Reboot the scope. If everything is okay till now, scope will start the Telnet server on reboot.
6.   If the network is connected you will see a LAN icon at the right-bottom corner of the display, right above the time. Click on that icon. You will see your IP address in the dialog that appears.
7.   Download and run Putty.
8.   Select “Telnet” as the connection type.
9.   Enter the IP address of your scope to Putty. Click “Open”
10.   If a command line appears everything is okay till now.
11.   Write “login” and press enter
12.   Username should be asked. Write “root” and press enter.
13.   Password should be asked. Write “siglent_sds1000x_e” and press enter. Don’t ask why the pwd is not sds2000x_plus
14.   You should see an empty new line. (ignore the error message about the directory change)
15.   Run the following commands one line at a time:

mount -o remount,rw,sync /usr/bin/siglent/usr/mass_storage/U-disk0/
 
mkdir /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup
mkdir /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/usr-bin-siglent
mkdir /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/usr-bin-siglent-usr
 
cp -R /usr/bin/siglent/firmdata0 /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/
cp -R /usr/bin/siglent/usr/config /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/
cp -R /usr/bin/siglent/usr/usr /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/
cp -R /usr/bin/siglent/usr/log /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/
cp /usr/bin/siglent/usr/webserver_password /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/
cp /usr/bin/siglent/usr/version.txt /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/
cp /usr/bin/siglent/usr/lighttpd_error.log /usr/bin/siglent/usr/mass_storage/U-disk0/sds2014xp_backup/

16.   Now you can remove the USB stick and save/check the files in your PC.

[Martin72]

2.   Copy the file attached to the USB stick.

Which file ?

[ozkarah]

2.   Copy the file attached to the USB stick.

Which file ?

Thanks for the heads up Martin. I updated the post.

[ozkarah]

Are you happy with the PP215 200MHz probes that came with  SDS2000X+?

I made some tests and found some weird results. First of all, shortest rise time my signal generator (SDG2042X) can generate is 8.4 ns. I don't have a better signal generator.
I read about fast edge signal generators in the forum but don't have any yet. So I checked the signal my LiteVNA 64 outputs.
Luckily, it transmits a square wave with a relatively fast edge (scope calculates the rise time around 740ps at over 150 MHz).
So I decided to use LiteVNA 64 to test the probes.

I made a simple setup. I put a BNC converter and probe adapter at S11 output of vna. LiteVNA is configured to output 175 MHz signal.


I tested the waveform with following:
1- 50 Ohm RG58 BNC cable (to see something very close to the actual signal) (using CH4 DC50)
2- Siglent PP215 Probe at 10X position (using DC1M)
3- Digilent 100 MHz Probe  at 10X position (using DC1M)

Here are the screenshots:
1- 50 Ohm RG58 BNC cable


2- Siglent PP215 Probe


3- Digilent 100 MHz Probe



You can see the cheap 100 MHz Digilent probe (from my Analog Discovery 2 kit) images a much better waveform.
How can it be? Am I missing something?
 

[Vestom]

I think the consensus is that the PP215 probes are "OK", but not exceptional in any way.

I measure a rise time of about 1.7ns using a Leo Bodnar pulse generator (see attached). Note though that the probe capacitance loads the signal and deteriorates the 50 Ohm transmission.

CH1. 50 Ohm BNC cable with DC50
CH3. Siglent PP215 probe at 10x with DC1M

Have you calibrated the probe to the scope with the adjustment screw?

[Johnny B Good]

@ozkarah

Possibly a thru-line 50 ohm terminator between the vna and the probe to bnc adapter? It may make a significant difference to the test results in this case.

@Vestom I just noticed the same lack in your first image. I think you both should repeat your tests with a thru-line 50 ohm terminator (or at least use a Tee adapter with a 50 ohm terminator) and compare the result against those of the original test.

[EDIT] Oops! Apologies, Vestom for not realising that you were effectively terminating the connection with CH1 set for DC50.

[Martin72]

And then they were three...
Today the "last" siglent has arrived - and the current probe CP5500 at last.
Monday we send them away for calibrating, I´m curious about the meausered values...

Martin

[tv84]

And then they were three...

Are you building a farm?

[Martin72]

Yep 
I want to have 9pcs....one for every working place.
Question in the round:
Will it be a good idea to run the self-cal procedure before giving them away for the calibration ?

[bdunham7]

I think the consensus is that the PP215 probes are "OK", but not exceptional in any way.

Certainly 'good enough' for probes included with a 100M oscilloscope.  I'm not sure what the deal is with the comparison to those Digilent models--perhaps they are much better than specified?

To be fair to the PP215 I tested it using the Bodnar pulser connected by a tee directly to the scope set for 50R input--no cable.  Then I put the BNC connector in the other side of the tee and tried both a Tek 6139A 8pF 500MHz 10X probe and the PP215.  The Tek measured ~10pF and the PP215 ~18pF.  The Tek does not fit in the BNC adapter and required the use of a ground lead, so there are a bunch of artifacts from that.
 There is a short coupling sleeve for it but that is packed away with another probe.  You can still get the basic idea.  Essentially I think that if you are using the probe in any ordinary way, your attention to the ground circuit and to circuit loading will vastly outweigh any differences between even a high-end probe like the 6139A and a 'mediocre' one like the PP215.  Input capacitance is probably the most important spec as you can see the difference even in a very low impedance source like this one.  If you had a circuit  with even a 1K source impedance, the loading would be the whole show at these bandwidths. 

Edit:  I managed to ground the 6139A a bit more respectably, so now you can see that it looks pretty good, mostly due to having half the circuit loading.  Note the amplitude error, the PP215 is more accurate in this regard.

[tautech]

Yep 
I want to have 9pcs....one for every working place.
Question in the round:
Will it be a good idea to run the self-cal procedure before giving them away for the calibration ?

Use this as a trap to see how good your Cal shop is. 
Ask when you get them back if they ran Self Cal after 30 mins warm up before doing the Performance Verification.

[tautech]

I think the consensus is that the PP215 probes are "OK", but not exceptional in any way.

Certainly 'good enough' for probes included with a 100M oscilloscope.

100 MHz it is indeed badged however real -3dB BW is much closer to 200 MHz than 100 MHz and the primary reason why the 100 MHz SDS2104X Plus is shipped with PP215 200 MHz probes.

[bdunham7]

100 MHz it is indeed badged however real -3dB BW is much closer to 200 MHz than 100 MHz and the primary reason why the 100 MHz SDS2104X Plus is shipped with PP215 200 MHz probes.

While I was happy to get the higher-quality PP215s, they don't really offer any performance advantage over the PP510 other than not falling apart.  I'm really curious about those Digilent probes.

Here's an expanded test of the 6139A, PP215 and PP510.  The PP510 measures ~16pF, slightly better than the PP215.  But the real takeaway IMO is that although the 6139A is clearly superior, it isn't going to matter in the least for the way probes are used the vast majority of the time--even with short leads or grounding springs.

[tautech]

While I was happy to get the higher-quality PP215s, they don't really offer any performance advantage over the PP510 other than not falling apart. 

Falling apart ? 
FYI there has been a change in Siglent PP510 and PP215 probes only visible that the later have 00 marked on them.
The only change I have noticed is the slightly different compensation range in ones marked 00.