So, you are trying to tell us that, if I'm measuring, say a complex set of 4 signals, the scope will perform better if limited to 100MHz rather than 200MHz when measuring the same set of signals??
At audio frequencies you won't see any difference.
With high frequency, real-world signals? Less aliasing.
So, you are trying to tell us that, if I'm measuring, say a complex set of 4 signals, the scope will perform better if limited to 100MHz rather than 200MHz when measuring the same set of signals??
At audio frequencies you won't see any difference.
With high frequency, real-world signals? Less aliasing.
given what you say is so, would the same rule not hold for the higher range Siglent scopes, for example the SDS2000X PLUS range that has FOUR model options of 100MHz, 200MHz, 350MHz and 500MHz?
you seems to be saying that for anyone who is interested in signal frequencies around the 100MHz area, compared to the base 100MHz SDS2104X+ model, the 200MHz variant will perform worse, the 350MHz variant will perform even worse, and the 500MHz variant will... well perhaps be most abysmal of all.
AND, if this is so, then why would Siglent not install a switch on their scopes, allowing the user to select a bandwidth limit appropriate to what they are measuring: the SDS2504X PLUS would have a 4 position selector for 100, 200, 350 and 500MHz limiting. or is this some sort of a marketing ploy, so that the poor user in a professional lab needs to own FOUR SDS2000X+ scopes, one for each bandwidth option.
cheers,
rob :-)
So, you are trying to tell us that, if I'm measuring, say a complex set of 4 signals, the scope will perform better if limited to 100MHz rather than 200MHz when measuring the same set of signals??
At audio frequencies you won't see any difference.
With high frequency, real-world signals? Less aliasing.
given what you say is so, would the same rule not hold for the higher range Siglent scopes, for example the SDS2000X PLUS range that has FOUR model options of 100MHz, 200MHz, 350MHz and 500MHz?
you seems to be saying that for anyone who is interested in signal frequencies around the 100MHz area, compared to the base 100MHz SDS2104X+ model, the 200MHz variant will perform worse, the 350MHz variant will perform even worse, and the 500MHz variant will... well perhaps be most abysmal of all.
AND, if this is so, then why would Siglent not install a switch on their scopes, allowing the user to select a bandwidth limit appropriate to what they are measuring: the SDS2504X PLUS would have a 4 position selector for 100, 200, 350 and 500MHz limiting. or is this some sort of a marketing ploy, so that the poor user in a professional lab needs to own FOUR SDS2000X+ scopes, one for each bandwidth option.
cheers,
rob :-)
given what you say is so, would the same rule not hold for the higher range Siglent scopes
for example the SDS2000X PLUS range that has FOUR model options of 100MHz, 200MHz, 350MHz and 500MHz?
you seems to be saying that for anyone who is interested in signal frequencies around the 100MHz area, compared to the base 100MHz SDS2104X+ model, the 200MHz variant will perform worse, the 350MHz variant will perform even worse, and the 500MHz variant will... well perhaps be most abysmal of all.
b) If I feed in a 300MHz square wave to that model I'll have a sine wave at 300MHz, a sine wave at 900MHz, etc. This graphic from the Siglent web site shows the bandwidth rolloff of the front end.
As you can see: The 900MHz wave is attenuated by about -12dB. It will alias as a 100Mhz signal but it will be small. You'll have to look hard to see it (an FFT should show it best...)
So... the aliasing you see on screen depends a lot on the characteristics of the analog front end.
(cue tautech telling us that Siglent front ends are the absolute best at this)
Hi, it work great, thanks !
I used SCPI to pass on 200MHz. For options it doesn't worked (while web UI told success), so i entered it manually.
And after unlocking all i restarted the scope & updated the firmware.
It's an awesome scope ❤️
Hi, it work great, thanks !
I used SCPI to pass on 200MHz. For options it doesn't worked (while web UI told success), so i entered it manually.
And after unlocking all i restarted the scope & updated the firmware.
It's an awesome scope ❤️
Same here. Over the web I only got TEMPORARY licence. Had to type it into the machine itself to get PERMANENT.
It looks to be -3dB down at ~550MHz. Would you not say that's pretty good?
Oscilloscopes are supposed to be -3dB at the bandwidth printed on the front, so... they overshot by 50MHz.
I'm more bothered by the 'step' at 200MHz.
That's actually a pretty decent response curve for the front end of a 100MHz or even 200MHz scope. It's not just a simple Gaussian roll-off and it looks like Siglent actually took some time an care to maximize the BW of it.
That's actually a pretty decent response curve for the front end of a 100MHz or even 200MHz scope. It's not just a simple Gaussian roll-off and it looks like Siglent actually took some time an care to maximize the BW of it.
I suspect the log scale helps to make it look pretty.
You still get the benefit of the higher BW with only one channel, and with certain well behaved signals, with two enabled.
Look up a Gaussian roll-off. You will se the difference.
BTW, where on Siglent's site did you find that graph?
That's actually a pretty decent response curve for the front end of a 100MHz or even 200MHz scope. It's not just a simple Gaussian roll-off and it looks like Siglent actually took some time an care to maximize the BW of it.
I suspect the log scale helps to make it look pretty.
After enabling the 200 MHz BW of the scope, I realized that the probes are 100 MHz (PP510). Siglent has a 200 MHz probe (PP215).
The specs on the PP215 state: Bandwidth: 6 MHz (X1) / 200 MHz (X10) and for the PP510: Bandwidth: 6 MHz (X1) / 100 MHz (X10).
Capacitance is essentially the same for both probes at 1x and 10x.
It seems there is no need/advantage to get the 200 MHz probe....Thoughts?
I haven't followed the topic of unlocking Siglent for a long time, just discovered that there is a keygen for SDS1000X-E model. But I have old SDS1102X model, can someone help if there is keygen for old SDS1000X model?
I know that bandwidth unlock for SDS1000X requires hw mod, but there are also other features which can be unlocked with key, such as serial decoders and harmonic analyzer. So, it will be interested to unlock it.
.. tv84 might help you ..
Why not use this code https://replit.com/@wgoeo/siglent-keygen#main.py as per https://www.eevblog.com/forum/testgear/unlocking-siglent-sds1104x-e-step-by-step/msg4066828/#msg4066828