Products > Test Equipment
Measuring Distortions with the Scope:What you see is not what you really have..
Martin72:
Hi,
--- Quote ---So...next thing I´ll try is to hack the 2042X to 120 Mhz, must read the threads for it.
--- End quote ---
That was pretty fast:
https://www.eevblog.com/forum/testgear/siglent-sdg2042x-hack-door-closed/msg4599439/#msg4599439
Now I got a SDG2122X...Nice. :D
Martin72:
--- Quote from: electr_peter on December 23, 2022, 09:55:03 pm ---1) Basic test would be to see if there is any second/third/... edge jitter when frequency is not "nice". There should be none.
2) Try looking at jitter of CH1/CH2 vs SYNC. I think SDG2000X does not have jitter, but that would be interesting to know for sure.
3) Also check FM modulation drift w.r.t. SYNC. SDG2000X definitely drifts in FM mode even with the newest firmware (many other AWGs drift the same for some reason).
4) Max frequency of SYNC on SDG2000X is only 10MHz. How does it compare with SDG1000X?
5) SDG2000X has new FW release which seem to improve rotary encoder performance. It would be a good comparison with SDG1000X variant.
--- End quote ---
Aha....And indeed I wondered about why the encoder is so...slowish and "stuttering"...Thanks for the hint!
tautech:
--- Quote from: electr_peter on December 23, 2022, 09:55:03 pm ---2) Try looking at jitter of CH1/CH2 vs SYNC. I think SDG2000X does not have jitter, but that would be interesting to know for sure.
--- End quote ---
Are datasheets too hard to read ? :-//
(Square wave) Jitter (rms), Cycle to cycle
SGD1000X 300 ps + 0.05 ppm of period
SDG2000X 150 ps
SDG6000X 100 ps
SDG7000A 20 ps cycle to cycle rms, >10 kHz,1Vpp, 50 Ω load
Martin72:
FFT with 1khz sinewave, 2.85vpp...
Separate, then both together using both mathchannels, unfortunately the top of the tables are "cutting off" by the screenshot..
Martin72:
Short video of the setup...
https://youtu.be/ekRBBR1Xj0k
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