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Siglent SDS1104X-E and SDS1204X-E Mixed Signal Oscilloscopes

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BillyO:

--- Quote from: tautech on August 26, 2023, 12:41:10 am ---Before tests I imagine ~400 MHz which fits with Nyquist.

--- End quote ---
That fits.  Using a sine wave I was able to get to 425MHz and have the waveform stable and the trigger point adjustable over more than 75% of the waveform.  It started to get a little jittery at 450MHz.  Signal was 526mVpp being fed in @ 425MHz and being displayed as 106mVpp, so -14db. Quite beyond where it makes sense.

BTW, the counter up in the upper right lost it's mind at about 350MHz.  The "Measure" counter worked fine up to 425MHz.

tautech:

--- Quote from: BillyO on August 26, 2023, 12:53:40 am ---Quite beyond where it makes sense.

--- End quote ---
Quite so, but there are use cases where one may not have access to a counter and while not precise the scopes counter might serve the required need.

bdunham7:

--- Quote from: tautech on August 26, 2023, 01:02:26 am ---Quite so, but there are use cases where one may not have access to a counter and while not precise the scopes counter might serve the required need.

--- End quote ---

Well, the problem with that is you can never be sure at what point the counter function becomes unreliable.  Even if you were able to characterize it in someone's lab who had the equipment, there are too many variables--signal level, noise, etc--to know whether it was accurate or not in practice.  What might work is the FFT going to 500MHz, that still shows fairly reliably if attenuated all the way to the top, again IIRC.

Calambres:
I think I've found yet another bug in my SDS1204X-E (born SDS1104X-E  ::) )

It is normally operating with WLAN connection to my local net. I use the internet connection to access an NPT server and so get the timestamp for the scope. So far so good.

If I want to run a Bode Plot II with my SDG1062X (also born SDG1032X  ^-^ ) I must connect them via LAN, otherwise (USB) I get noise (that's another story  >:( ) so I go to Utility - I/O - Net Interface LAN.

Again, so far so good; Bode Plot II connects OK with the AWG and plots fine. Once I'm done I must exit Bode Plot II and then restore the WLAN connection again with success but I see that there's no way to connect to the previously accessed NTP server any more. If I shut down the scope and restart it again, WLAN connects fine (I can access the scope via web server) but the NTP server still fails to connect. I have found that if I go to System - Date/Time - NTP - Server IP and change the NTP server to another one it succeeds in connecting. In fact, If I change just one digit of the previously non working IP address and then put it back as it was before, the NTP server connects OK.

In short, it seems that once you change the interface from WLAN to LAN and then back to WLAN you have to change the NTP IP address to get a successful connection, even if you type the same IP again!

Please can anyone confirm that this is not an issue with my scope only?

SDS1204X-E
SW:    6.1.37.R10
OS:    8.3
FPGA: 2021-11-08
HW:   01-05

BillyO:

--- Quote from: Calambres on September 18, 2023, 11:32:12 am ---In short, it seems that once you change the interface from WLAN to LAN and then back to WLAN you have to change the NTP IP address to get a successful connection, even if you type the same IP again!

--- End quote ---

How are you making this change from LAN to WLAN and back?  Are you physically changing cables?

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