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Siglent SDG6000X series 200-500 MHz AWG's

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nctnico:

--- Quote from: berke on December 06, 2022, 10:57:37 pm ---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
--- End quote ---
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:

--- Quote from: tautech on December 06, 2022, 07:46:52 am ---
--- Quote from: XerXes777 on December 05, 2022, 08:23:26 pm ---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.


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

--- End quote ---

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:

--- Quote from: berke on December 15, 2022, 12:53:24 pm ---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.

--- End quote ---

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:

--- 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.

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