Does the ERES work? I read from the v2 firmware thread that it does not do anything in the case of the sds2000. If the ERES works...
There are rumors and beliefs - whether intentionally or unintentionally. Sometimes, it may also be the case whether the person does not know how to use the device, or that do not understand what a function is. As in the past, for example with regard to the SDS1000X Dave went completely confused when he introduced the sequence mode in ranting video aka "rewiev". (or was it lesson: "do not abuse scope")
These tests are from older FW 1.02.01.01.28R1
(new FW is 1.2.1.1.3301)
NOTE: because this topic is about SDS2000X need emphasize that this my test is made using SDS2000.
I can not guarantee SDS2000X is exactly same if do exactly these same tests In images a to i signal is same. In image k signal externally combined noise is removed and frequency changed but sine level to scope is still 600mVp-p
a
image a is just normal mode with full 2GSa/s samplerate. 1 channel in use.
Signal is 16kHz sinewave where is also added gaussian noise ~0 to ~80MHz (two signals, sine and noise, combined before scope input)
Wfm/s speed is around 970 wfm/s. No detectable difference if use dots or lines and/or sinc on or off or persistence.
(in this image: lines, sinc on, persitence off)
b
same normal mode as a but samplerate dropped to 100MSa/s (14k memory. In Siglent, whole memory in use is always mapped to display, not overlapp)
Wfm/s speed is now ~2900. No detectable difference if use dots or lines and/or sinc on or off or persistence.
(in this image: lines, sinc on, persitence off)
c
same as b but mode is PeakDetect
Wfm/s speed is now ~2900 as also in b. No detectable difference if use dots or lines and/or sinc on or off or persistence.
(in this image: lines, sinc on, persitence off)
d, e, f, g, h, i
same as b exept now mode is ERES 0.5/1.0/1.5/2.0/2.5/3.0
Wfm/s speed is now ~ 7* No detectable difference if use dots or lines and/or sinc on or off
(in this image: lines, sinc on, persitence not selectable)
* this is for 10us/div ERES.
k
Signal 700kHz pure sinewave 600mVp-p where can see -3dB drop.
Ref level 0dB as 16kHz sinewave.
(if drop samplerate to 10MSa/s and keep ERES3.0 then (just math) -3dB points also drops to 70kHz
If 100MSa/s and change ERES 3.0 to ERES 2.5 then -3dB points move to 1400kHz ... and so on...)