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Siglent SDG6000X series 200-500 MHz AWG's

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2N3055:

--- Quote from: berke on December 15, 2022, 02:42:49 pm ---
--- Quote from: 2N3055 on December 15, 2022, 02:07:22 pm ---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..

--- End quote ---
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.

--- End quote ---

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

berke:

--- Quote from: 2N3055 on December 15, 2022, 03:41:38 pm ---Good, some progress.
What is repetition frequency of the signal?

--- End quote ---

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:

--- Quote from: mawyatt on December 16, 2022, 04:51:00 pm ---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?

--- End quote ---

Hi,

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

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