Siglent SDG6000X series 200-500 MHz AWG's

[nctnico]

I bought it mainly to replace my old 10 MHz GW Instek analog function generator without breaking the bank too much (that thing can't stay on frequency for a second.)  So it's night and day.  Now should I have bought something else for the same price or less?  I considered some entry-level Keysight/Tek generators

Those will certainly behave better! If you need precission time & frequency behaviour, it is going to cost you. My Tektronix AFG31000 series doesn't show such a drift.

[XerXes777]

What is the KEY Word to get the IQ Key?
I use this Script:
I try these words:
IQ, I/Q, IQWAVE, AWG, SDG6000X-IQ, SDG6000XIQ, WAVE
I got the 500M Key its works.

It might be the SKU code here:
https://siglentna.com/product/sdg-6000x-iq-signal-generator-function/

I found a solution.

I made a new Thread:
https://www.eevblog.com/forum/testgear/siglent-sds-sdg-hack-script/msg4578985/#msg4578985

[berke]

Just a quick follow-up on the lag between channels and the SYNC out.

The sync pulse lags by 39.2 ns on average with a periodic variation (as discussed above) that spans 3.5 ns.  The shape of the SYNC pulse is quite ugly, see below.  The sync pulse reaches a peak value of about 4.6 V.

[2N3055]

Just a quick follow-up on the lag between channels and the SYNC out.

The sync pulse lags by 39.2 ns on average with a periodic variation (as discussed above) that spans 3.5 ns.  The shape of the SYNC pulse is quite ugly, see below.  The sync pulse reaches a peak value of about 4.6 V.

Hello,

your post prompted me to go and check...

First, shape of Sync pulse is just fine. You need to use 50Ohm termination for that output.
Then it is decent square pulse.

Take a look at following image in attachment. SDG6000X, 10 MHz, Synch out.
Delay is cca 8ns and jitter between channel (CH1) and Synch (CH3) is 12.6 ps RMS and some 70 ps P-P..
Scope used is SDS2000X HD.

Something is going on. I cannot replicate your finding.. Mind me I'm not saying you're not seeing it, but something is weird..

[berke]

Take a look at following image in attachment. SDG6000X, 10 MHz, Synch out.
Delay is cca 8ns and jitter between channel (CH1) and Synch (CH3) is 12.6 ps RMS and some 70 ps P-P..
Scope used is SDS2000X HD.

Something is going on. I cannot replicate your finding.. Mind me I'm not saying you're not seeing it, but something is weird..

Thanks !  I wasn't using a 50 ohm termination on the sync line, only on the outputs.  I had thought about using it on SYNC/AUX but the manual doesn't say anything and I didn't want to blow up something, you never know.  Since you mentioned it I guessed it's safe and turned it on, the sync pulse looks decent.

Still the same spread but the delay is (understandably) lower, 5.2 to 8.8 ns, mean 7 ns, sigma 0.95 ns.

[2N3055]

Take a look at following image in attachment. SDG6000X, 10 MHz, Synch out.
Delay is cca 8ns and jitter between channel (CH1) and Synch (CH3) is 12.6 ps RMS and some 70 ps P-P..
Scope used is SDS2000X HD.

Something is going on. I cannot replicate your finding.. Mind me I'm not saying you're not seeing it, but something is weird..

Thanks !  I wasn't using a 50 ohm termination on the sync line, only on the outputs.  I had thought about using it on SYNC/AUX but the manual doesn't say anything and I didn't want to blow up something, you never know.  Since you mentioned it I guessed it's safe and turned it on, the sync pulse looks decent.

Still the same spread but the delay is (understandably) lower, 5.2 to 8.8 ns, mean 7 ns, sigma 0.95 ns.

Good, some progress.
What is repetition frequency of the signal?

[berke]

Good, some progress.
What is repetition frequency of the signal?

You mean the period of delay between SYNC and Ch1?  As noted previously it depends on the frequencies.

I was wondering if dividing down the SYNC could get me a stable signal.  The sync between the channels is not bad, so I did a quick test by setting fCH2 to fCH1/n.  (Later I can try with a divider.)

I'm generating 100 kHz on Ch1 and 20 kHz on Ch2, and SYNC comes from Ch1.  In this case, the Ch1-SYNC delay drifts much more slowly.  It goes from 2.2 ns to 5.7 ns in 165 s in a sawtooth fashion.

Funny thing if I set Ch2 to 100 kHz as well I don't see any drift (within 60 s of observation)!?  Quite weird.  Stay tuned, further tests after dinner!

[berke]

Here are some new Chan1-SYNC output delay drift results.

I  couldn't get the scope to record the sequence of pulse width measurements but it's a new scope and I'm not familiar with it yet.

As I was watching the measured delay readings I noticed that the behaviour is distinctly non-linear.

I managed to get an approximate recording of the drift by comparing the Ch1 output and the SYNC output with an LVDS receiver and then filtering the output.  The result is not going to be very linear or stable (ringing due to improvised connections etc.) but should be good enough to get the drift period.  Ch1 is set to pulse, 10 MHz, 500 mV, 26 ns width and allegedly 2 ns rise on the Siglent.  SYNC output is connected to IN+ of DS90LT012AQ via 10 dB attenuator, Ch1 output to IN-, receiver output terminated with 50 ohm, RC filtered with 2k2/100n (not selected on purpose) probed with a 1k2/RG58 coax and then filtered with a DC-1.9 MHz Minicircuits filter, and I set the scope BW to 20 MHz for good measure.  It's 5 seconds per division.

The benefit of this last method is that I don't have to worry about the scope trigger frequency aliasing the jitter.

[mawyatt]

Question regarding the color of the Channel 1 output on the SDG6000X. On the panel Ch1 color is Blue, Ch2 is Yellow, however on the display Ch1 overlay is Green. Is there a way to change the Ch1 overlay color to Blue?

One the SDG2000X Ch1 panel is Green and the display overlay is Green.

Best,

[berke]

Question regarding the color of the Channel 1 output on the SDG6000X. On the panel Ch1 color is Blue, Ch2 is Yellow, however on the display Ch1 overlay is Green. Is there a way to change the Ch1 overlay color to Blue?

Hi,

Just go to Utility → System → Page 2 → UI Style and select "Classical".

[strahd_von_zarovich]

Hi everyone,
Is there anyone who face with the problem of not being able to enable DHCP? Here is the video:

[baldurn]

It is likely trying to get a DHCP lease. That seems to fail within a timeout so it disables again.

[Detlev]

Hello everyone,

I think I found a bug in firmware 6.01.01.36R3 on the SDG6022X:

I have the SDG and the frequency counter FCA3000 both attached to the Leo Bodnar GPSDO. With the previous version of the firmware, the SDG6022 was synchronized to the GPSDO after switching on.

With the current firmware, however, the internal clock is active after switching on, although the SDG shows the external clock as selected in the setup. This is only noticeable if you also check the frequency with the frequency counter.

Can other SDG owners also confirm this?

Many greetings
Detlev

[oz2cpu]

did anyone make their own 2D (stereo) files, and then upload to the SDG6022X
lt is very easy to do when it is a normal single channel file, But
lets say we want to make grafix on a scope in XY mode, but like to manually plot our own lines,
that is why we need to undersand how to make a 2ch file.

[berke]

did anyone make their own 2D (stereo) files, and then upload to the SDG6022X
lt is very easy to do when it is a normal single channel file, But
lets say we want to make grafix on a scope in XY mode, but like to manually plot our own lines,

No and I'd like to know.  The manual doesn't say anything, and I don't feel like running some weird Windows executable on my machine.
However you can generate separate channels for the CSV's and it works pretty well.

(No Z-axis?  No problem.)

91 MSa/s, TrueArb

[berke]

I ran into some other annoyances, apologies if they have been already mentioned.

1. While generating a square or pulse signal, if you change the duty cycle, the signal goes through zero for a few ms.

I then tried to modulate the PWM on CH1 from CH2.  Modulating with a sine wave gives a smoothly varying input, so that's good, but I wanted to switch between two levels manually, which brings to the next point.

2. You can't modulate using the "constant DC" output.  (In the end I used a pulse waveform on CH2 using burst mode, manually triggered.)

3. Another thing that is really annoying is that you can't set the duty cycle to 0 or 100% in square or pulse modes, you get an annoying beep.

4. Unless you turn it very slowly, the rotary encoder misses pulses.  How hard is it to count pulses ?

5. Not a big deal, but it would be nice if you could set Vlo > Vhi for "inverted polarity" PWM generation.

6. Also, is this thing supposed to remember its settings across power cycles ?  Every time I power it up, I have to set the voltage range to 0-3.3 V from -2 to +2 V.  Thankfully I haven't fried anything yet but it may happen one day.

[Detlev]

I did some measurements on the AWG today. It's a SDG6022X with no improvements
The level was always -10dBm and the reference clock came from the internal oscillator. I adjusted this two weeks ago and today I had a deviation of 40ppb compared to my Leo GPSDO.

I'll let the measurements speak for themselves, the parameters can be seen on the screenshots. I hope it is of interest to you.

Your
Detlev

[Detlev]

I just saw that the phase noise markers are a bit shifted, sorry for that

[mawyatt]

Close enough

Impressive AWG performance!!

If you have access to the little brother SDG2000X, might be interesting in how well it behaves

Best,

[Detlev]

Unfortunately, I don't have access to the SDG2000X, so I can't make any comparisons here

[hpw]

I just saw that the phase noise markers are a bit shifted, sorry for that

Would be nice to do some FM/PM modulation graphs as using 10MHz and square waves.

While on SDG2K even latest FW is in question, as Siglent claimed to have fixed the square wave modulation on a later SDG6K FW too.

PM me if you need the used settings as low deviation factors used.

Hp

[Detlev]

Would be nice to do some FM/PM modulation graphs as using 10MHz and square waves.

While on SDG2K even latest FW is in question, as Siglent claimed to have fixed the square wave modulation on a later SDG6K FW too.

PM me if you need the used settings as low deviation factors used.

Hp

If you can specify more parameters, then I can see what I can do (FM frequncy, frequency deviation)

[hpw]

If you can specify more parameters, then I can see what I can do (FM frequncy, frequency deviation)

See my old post https://www.eevblog.com/forum/testgear/siglent-sdg2000x-firmware-hardware-software-versions/msg4574719/#msg4574719

SDG Generator setup:
- Square +510mV -510mV
- Spectrum 0dBm as 20dB attenuation, 1Hz BW, 2.5kHz / 500Hz Span

SDG:

FM: 10MHz, Square, 500Hz 105mHz expected side peaks at -80dB

PM: 10MHz, Square, 500Hz 0.014°, expected side peaks at -80dB

Just a first measurement request...

Hp

[Detlev]

I took two measurements here. If the carrier is a rectangle, I don't see any sidebands. Therefore, here carrier with sine and modulation with square. Above in the screenshot are the parameters.

If you want, I can do more measurements, the devices have warmed up 

[hpw]

I took two measurements here. If the carrier is a rectangle, I don't see any sidebands. Therefore, here carrier with sine and modulation with square. Above in the screenshot are the parameters.

If you want, I can do more measurements, the devices have warmed up 

Well, "Wer mist, mist Mist" 

I mean, the R&S is in noise figures any better than the used SSA2K plus, also the close in noise figures any different.

IMHO, best would be to generate the signals as using LTSpice/Matlab or else and measure the real expected modulation peaks. To build a table with various figures and modulation frequency else than 500Hz as may 100, 200, 500, 1000 Hz with various deviations.

Else is fishing on the dark moon site. 

As models from R&S & KS & Tektronix & Siglent & Rigols with may any different values. But for sure the SDG2K & SDG6K.

Hp