Author Topic: The Siglent SDG2042X Thread  (Read 258172 times)

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Offline Co6aka

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Re: The Siglent SDG2042X Thread
« Reply #800 on: August 17, 2017, 12:48:19 pm »
Has anyone tried hacking the telnet password with something like THC-Hydra?   https://www.thc.org/

Also, I thought there was some recent telnet vulnerability and exploit???  :-//
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Offline CustomEngineerer

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Re: The Siglent SDG2042X Thread
« Reply #801 on: August 17, 2017, 10:09:57 pm »
Yes, and let it run for a couple of weeks with no luck. But feel free to try yourself, you never know, you might get lucky.
 

Offline IDEngineer

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Re: The Siglent SDG2042X Thread
« Reply #802 on: August 18, 2017, 09:27:28 am »
Is there an EEVblog-preferred vendor for the SDG2042X? TEquipment doesn't carry it, and I want to be supportive of the EEV community. Any discount codes would be appreciated too. Thanks in advance!
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Offline CustomEngineerer

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Re: The Siglent SDG2042X Thread
« Reply #803 on: August 18, 2017, 10:34:36 am »
I bought mine from tequipment, but they no longer sale Siglent equipment (no idea why). I believe the current recommended company if you are in America is Saelig. They have a discount thread on this board (Test Equipment) where you can request a discount code. I'm pretty sure its for the same discount amount that tequipment offers to forum members.

Edit: Found the thread: https://www.eevblog.com/forum/testgear/equipment-discounts-from-saelig/

Edit2: I'm not actually endorsing Saelig since I've never used them, but don't remember seeing any complaints about them, and know they do offer a discount to forum members.
« Last Edit: August 18, 2017, 10:41:09 am by CustomEngineerer »
 
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Offline CustomEngineerer

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Re: The Siglent SDG2042X Thread
« Reply #804 on: August 18, 2017, 10:49:23 am »
Yes, and let it run for a couple of weeks with no luck. But feel free to try yourself, you never know, you might get lucky.

To be clear, I ran John the Ripper against the passwd/shadow files (for speed since had access to them), not directly against telnet. It was something I had played with many years ago, but certainly wouldn't consider myself an expert. Plus, was more just playing around, since there were already ways to unlock the extra bandwidth, and I didn't really need it anyways. I seem to remember there was at least 1 or 2 (probably more) other users also trying similar around that time. I couldn't tell you exactly what they did, but I really didn't put a lot of effort into it, just ran it several times using pretty generic dictionary files. The last time I tried, it ran for two to three weeks before I lost power at home and computer shutdown.
I do remember seeing on older thread on this board somewhere where someone had figured out one of the older Siglent passwords (thinking it was the previous generation of generators, SDG4000 or SDG5000 SDG800 or SDG1000 maybe), and so I did try variations of that password, but never got anywhere.

Edit: Updated incorrect previous generation generator models
« Last Edit: August 18, 2017, 10:58:26 am by CustomEngineerer »
 
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Offline mspec

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Re: The Siglent SDG2042X Thread
« Reply #805 on: August 18, 2017, 01:38:48 pm »
As I mentioned earlier I have the SDG1032X which more out of curiosity I would like to see if I can get into. I am more wondering what username people have used for the login: line. Would it be Root or Admin or perhaps even just telnet. I am not putting a massive amount of effort into this but will have a play around.
 

Offline IDEngineer

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Re: The Siglent SDG2042X Thread
« Reply #806 on: August 22, 2017, 07:04:39 am »
I bought mine from tequipment, but they no longer sale Siglent equipment (no idea why). I believe the current recommended company if you are in America is Saelig. They have a discount thread on this board (Test Equipment) where you can request a discount code. I'm pretty sure its for the same discount amount that tequipment offers to forum members.
Thanks, I'll dig into that. Sorry for the delay in responding, I thought this forum emailed a notification when a response showed up. Maybe my settings are off, I'll check.

Thanks again!
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Offline CustomEngineerer

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Re: The Siglent SDG2042X Thread
« Reply #807 on: August 22, 2017, 09:06:01 am »
The telnet username (at least on the SDG2000X, assuming its the same for the SDG1000X) is root. lowercase
 

Offline pigrew

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Re: The Siglent SDG2042X Thread
« Reply #808 on: August 22, 2017, 09:54:59 am »
I've noticed that there's a weird frequency offset in my SDG2042X.

I've used the external reference to lock to my frequency counter's 10 MHz output (square wave mode). The counter is reporting the following:

Programmed PeriodReading
1000 s1000.266442
100 s100.0053211
10 s10.0000525
1 s1.000000450
0.1 s0.1000000024
0.01 s0.0100000002

It seems that there is an off-by-one error in the generator's firmware? Can someone else confirm, or has this been reported already?

Or is my frequency counter broken? The data is following a log-log trend.

How I wish that these instruments were open source......

EDIT: If this measurement is true, a 1 hour period would actually be 1 hour, 11 seconds. Programming 3 hours would yield 3 hours, 1 minute, 59 seconds. 12 hours should yield an extra 37 minutes.
« Last Edit: August 22, 2017, 11:48:18 am by pigrew »
 

Offline rf-loop

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Re: The Siglent SDG2042X Thread
« Reply #809 on: August 22, 2017, 05:53:18 pm »

Programmed PeriodReading
1000 s1000.266442
100 s100.0053211
10 s10.0000525
1 s1.000000450
0.1 s0.1000000024
0.01 s0.0100000002




I made test with only some periods.

Test setup. HP53131A
SDG2042X  FW 2.01.01.23R5  HW 02-01-00-35-00

Both equipments use same frequency reference clock, in this case both use HP53131A internal (option)  OCXO what really is very good and with exellent short time stability. Much better than example Trimble GPS crap or cheap Rb oscillators if look very short time jitter. Long time drift is other thing. And in this setup, drift in period time is nearly eliminated because both use same reference. (but locking quality to reference may differ but no need "time nutting"  for this case)

Signal level from SDG to counter 3Vpp @ 50ohm.  Counter trigger (Auto Off) level set to zero and positive edge. Counter in DC coupling mode.   
Signal type square and measured risetime under 5ns

Due to lack of time not measured more long periods and this may give enough confirmations for  your findings.

SDG2042X period measured (gt = gate time)
10ms»»» 0, 010 000 000 02s  gt 1s
100ms»» 0, 100 000 002 38 s gt 10s
1s »»»»» 1, 000 000 450 19 s gt 20s
10s»»»»10, 000 052 463 5 s   gt 100s
« Last Edit: August 22, 2017, 06:09:58 pm by rf-loop »
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Offline pigrew

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Re: The Siglent SDG2042X Thread
« Reply #810 on: August 23, 2017, 12:00:46 am »
Due to lack of time not measured more long periods and this may give enough confirmations for your findings.

Looks like your measurements match mine fairly well. I ran some 3600s runs overnight with the internal timebase, and logging on my computer (clock synchronized to NTP, probably within 50ms). The 50% duty cycle square has low times of 1815.6 seconds and high times of 1800 seconds. I won't add this to my previous post since it uses the internal timebase instead of being locked to the counter, but it is close to the observed trend (3611.7 sec was predicted). The SDG2042X's internal timebase was adjusted to be within 10ppb of a (cheap TruePosition) GPSDO at the start of test, and was within that range at the end of the test, too.

This is a 50.2% duty cycle. Close enough? I'm about to start a T=4 hour run (reference locked), which take an extra 3.6 minutes.
 

Offline siglent5

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Re: The Siglent SDG2042X Thread
« Reply #811 on: August 23, 2017, 10:35:33 am »
Due to the principle of DDS, the output frequency will have some error.For the freq of dds is 300MHz,and the acc is 49 bits,you can exactly calculate the true freq when you set the period as 1000s.For example,when period is 1000s, ideal ftw =0.001*2^49/300M=1876.5,the actual ftw= 1876,so the actual period = 1000.2664417578.
 
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Offline CustomEngineerer

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Re: The Siglent SDG2042X Thread
« Reply #812 on: August 23, 2017, 10:59:22 am »
Great explanation siglent5. Those calculations perfectly match the reported results.
 

Offline pigrew

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Re: The Siglent SDG2042X Thread
« Reply #813 on: August 23, 2017, 11:51:28 am »
Due to the principle of DDS, the output frequency will have some error.For the freq of dds is 300MHz,and the acc is 49 bits,you can exactly calculate the true freq when you set the period as 1000s. For example,when period is 1000s, ideal ftw =0.001*2^49/300M=1876.5,the actual ftw= 1876,so the actual period = 1000.2664417578.

I hadn't been aware that the square wave mode uses DDS on the unit (or that DDS would generate such a weird result for low frequencies). I found a reasonable description of frequency tuning words.

However, I still feel the equipment should be able to do better. For example, using TrueARB mode with the included Square50 ARB, I'm able to output signals with 10.00000000s periods. Or is there some disadvantage to that which I'm not aware of? (Probably less accurate duty cycles?)

Perhaps there's an even better way than these that I don't know about. For example, can the sample rate be reduced for low-frequency outputs instead of using the standard DDS mode? That would help both sine-generation and square generation.

Thanks!
 

Offline siglent5

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Re: The Siglent SDG2042X Thread
« Reply #814 on: August 23, 2017, 01:27:18 pm »
1.the awg can output wave at any frequency because all of the wave use the improved dds.
2.the truearb mode can greatly reduce the error,but still have some error.for example,when you set square50 arb with its freq = 100mhz(period =10s),you can see the Srate =16384 Sa/s(because the point of square50 arb is 16384).it means that the freq of dds is 16384 Hz,and in this freq,the error is very small,so you measure the period =10.0000000000.
3.the sample rate of the dac is fixed.so if you reduced the freq of dds,you may need an additional module (such as DUC(Digital Up Conversion))to reample the  low sample rate signal to the fixed 300MHz ,then the system may be complex.
« Last Edit: August 23, 2017, 01:30:49 pm by siglent5 »
 

Offline thememo

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Re: The Siglent SDG2042X Thread
« Reply #815 on: August 28, 2017, 04:41:21 am »
I got mine today and hack it from 40Mhz to 120Mhz in 5 minutes  :-DD :-+
Very nice generator  :-+

how you can do that? My signal generator came with version 22R5 , i downgraded it to 17R5( actually i tried to 16R2 but signal generator did not permit) . when i connect to LAN ,i did not see the signal generator's ip , you can look the pictures... main problem is when i click the DHCP ON, ip adress and others became 0.0.0.0.  any idea  |O
 

Offline eurofox

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Re: The Siglent SDG2042X Thread
« Reply #816 on: August 28, 2017, 05:46:08 am »
I got mine today and hack it from 40Mhz to 120Mhz in 5 minutes  :-DD :-+
Very nice generator  :-+

how you can do that? My signal generator came with version 22R5 , i downgraded it to 17R5( actually i tried to 16R2 but signal generator did not permit) . when i connect to LAN ,i did not see the signal generator's ip , you can look the pictures... main problem is when i click the DHCP ON, ip adress and others became 0.0.0.0.  any idea  |O

Maybe you have a problem with your cable, router or home network.
eurofox
 

Offline IDEngineer

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Re: The Siglent SDG2042X Thread
« Reply #817 on: August 28, 2017, 06:09:53 am »
Quote
Maybe you have a problem with your cable, router or home network.
Perhaps he doesn't have a DHCP server? If he runs everything statically addressed, DHCP won't find a server and won't be assigned an address.
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Offline rf-loop

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Re: The Siglent SDG2042X Thread
« Reply #818 on: August 28, 2017, 06:42:41 am »

how you can do that? My signal generator came with version 22R5 , i downgraded it to 17R5( actually i tried to 16R2 but signal generator did not permit) . when i connect to LAN ,i did not see the signal generator's ip , you can look the pictures... main problem is when i click the DHCP ON, ip adress and others became 0.0.0.0.  any idea  |O

As can read in 17R5 documents that after this version (and later) can not downgrade to older FW than 17R5. Of course this restriction is also inherited in the following versions.

It is not at all mandatory to turn DHCP on. There is not any reason to use DHCP. Just without it you need set your PC network for working with  IP what you can find in SDG window without DHCP on. 

I've also seen 23R5 with my own eyes (most new units with this version but not downloadable from Siglent at this time).
« Last Edit: August 28, 2017, 06:50:53 am 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.
 

Offline IDEngineer

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Re: The Siglent SDG2042X Thread
« Reply #819 on: August 29, 2017, 01:29:17 am »
I've also seen 23R5 with my own eyes (most new units with this version but not downloadable from Siglent at this time).
Which raises an interesting question: If you are getting a brand new unit (arrives tomorrow), does the unit allow you to save the existing firmware to a file, do the downgrade, apply the hack, and then upgrade back to the as-shipped 23R5 firmware? Or are you stuck with a previous rev if you want to use the hack?
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Offline rf-loop

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Re: The Siglent SDG2042X Thread
« Reply #820 on: August 29, 2017, 01:54:20 am »
I've also seen 23R5 with my own eyes (most new units with this version but not downloadable from Siglent at this time).
Which raises an interesting question: If you are getting a brand new unit (arrives tomorrow), does the unit allow you to save the existing firmware to a file, do the downgrade, apply the hack, and then upgrade back to the as-shipped 23R5 firmware? Or are you stuck with a previous rev if you want to use the hack?

Not using simple methods
If you go out from 23R5,  at this time most new downloadable FW is 23R3.
From 17R5 or higher version versions can not go under 17R5 version. But higher versions are compatible for uödate  even older than 17R5 without intermediate update step - afaik.
For get more new FW version  than 23R3 need wait until Siglent publish new version in download center.
As we can see they also need care how new public versions are compatible with every previous versions so it need carefully think what to publish. In factory they do not need care because new FW go to fresh unit without any previous FW.
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.
 

Offline IDEngineer

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Re: The Siglent SDG2042X Thread
« Reply #821 on: August 29, 2017, 06:09:58 am »
If you go out from 23R5,  at this time most new downloadable FW is 23R3.
Then I guess the question becomes "What bugs were fixed, or features were added, between 23R3 and 23R5?" If you can live without the improvements, then the downgrade is OK. Otherwise, might have to hold off on the BW upgrade until 23R5 is released as standalone firmware.

Lots of devices allow you to download the firmware out of the device and save it as a file as a way to preserve your factory setup, in case something goes wrong. I guess not the SDG2000X series....
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Online McBryce

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Re: The Siglent SDG2042X Thread
« Reply #822 on: August 31, 2017, 10:44:14 pm »
You can just download the version that is in your device from the internet, no need to download it from the device.

McBryce.
 

Offline IDEngineer

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Re: The Siglent SDG2042X Thread
« Reply #823 on: September 01, 2017, 01:52:57 am »
You can just download the version that is in your device from the internet, no need to download it from the device.
Except that present production is shipping with 23R5, while:
Quote
at this time most new downloadable FW is 23R3
In other words, the latest production firmware is later than what can be downloaded. If you cannot extract the firmware from the device, then applying the hack means you lose the latest firmware update(s), at least until Saelig makes your production version available for download.

Hence the discussion regarding whether the changes in the updates are more important than the bandwidth increase.
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Offline Dwaine

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Re: The Siglent SDG2042X Thread
« Reply #824 on: September 01, 2017, 09:59:10 am »
Anyone have a clue why Siglent has not released the new firmware by download?   You would think they would of posted it by now.
 


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