Products > Test Equipment
Siglent SDS1104X-E In-Depth Review
<< < (37/48) > >>
bobof:

--- Quote from: 2N3055 on June 16, 2019, 06:17:53 pm ---Unfortunately, it was a quick check so Picoscope is not same vertical scale

--- End quote ---
I hadn't clocked that, thanks for clarification :)
rf-loop:

--- Quote from: 2N3055 on June 16, 2019, 06:09:09 pm ---
--- Quote from: rf-loop on June 16, 2019, 05:46:37 pm ---
--- Quote from: 2N3055 on June 16, 2019, 05:17:42 pm ---Here, quick capture, sweep from 1kHz to 200MHz, 200mV P-P, 61 sec sweep, several passes.
Scopes used MSOX3104T and Picoscope 3406D MSO.. Flat top window on FFT.

Picoscope TA131 and Testec TT HF212..

--- End quote ---

No any word about test setup.
Please, can you explain how was probes connected to signal source, including also source impedance.
Test setup is least as important as result data - images.

--- End quote ---

Like I said before SSDG6000X, probes with BNC tip adapter directly to the output of siggen. Before measurement, I grabbed 1 MHz square wave with direct BNC cable (50 ohm terminated) into reference trace, and compensated both probes to overlay their response over reference one.. and check with 1 kHz square wave for low frequency top flatness..

HF 212 has 3 trimmers, 1 for LF and 2 for HF compensation.. TA131 has only LF compensation on probe body. I didn't try to lift sticker on BNC side box to see if it has HF compensation there but hidden from user.

--- End quote ---

SDG6000X output impedance is 50ohm. So you have tested probes frequency response using 50ohm source impedance.
Normal standard practice is - and have been tens of years - for test probes frequency and step response using 25ohm source impedance!

Also @Performa01 have used right source impedance, as can see example here:


--- Quote from: Performa01 on February 23, 2018, 12:54:56 pm ---As can be seen, the circuit already contains the standard test setup: Signal generator with 50 ohms source impedance and 50 ohms through termination directly on its output, resulting in a total source impedance of 25 ohms, as seen by the probe.

--- End quote ---
graybeard:
I have been using my SDS1104X-E oscilloscope for more than a month, and except for lacking a trigger reference in the data file I have been very happy with the ease of use, features, and performance of the scope. 

However the 100 MHz PP510 probes that come with it are a steaming pile of excrement because of the flaky X1/X10 switch on the probe.  The contacts on the switch are intermittent and easily tweaked while using.  If it was a dedicated X10 probe without the switch it would be fine, but the poor quality switch renders them highly unreliable and useless for me.
BillB:

--- Quote from: graybeard on June 17, 2019, 06:47:29 pm ---However the 100 MHz PP510 probes that come with it are a steaming pile of excrement because of the flaky X1/X10 switch on the probe.  The contacts on the switch are intermittent and easily tweaked while using.  If it was a dedicated X10 probe without the switch it would be fine, but the poor quality switch renders them highly unreliable and useless for me.

--- End quote ---

That's surprising.  To me, the switch has a decent amount of mechanical resistance to it, and I must make a conscious effort to switch them.  I really haven't noticed any particular flakiness during use.   :-//   
tautech:

--- Quote from: graybeard on June 17, 2019, 06:47:29 pm ---I have been using my SDS1104X-E oscilloscope for more than a month, and except for lacking a trigger reference in the data file I have been very happy with the ease of use, features, and performance of the scope. 

However the 100 MHz PP510 probes that come with it are a steaming pile of excrement because of the flaky X1/X10 switch on the probe.  The contacts on the switch are intermittent and easily tweaked while using.  If it was a dedicated X10 probe without the switch it would be fine, but the poor quality switch renders them highly unreliable and useless for me.

--- End quote ---
Chris, we do get the very occasional crook one.

I check every one like this:
Connect to Probe Cal output.
Find a V/div and Vertical Pos setting for 10x probe that can also display 1x probe switch setting without any other adjustment. Ensure a Trigger is maintained with each probe setting.
From one or the other probe attenuation switching must be displayed as a snappy clean change in amplitude, no laggy tails or instability at either 1x or 10x. Gently wiggle the switch at 1x, if it's not perfect claim warranty.

Check each probe carefully, they should be perfect.

When you know for sure how many are crook drop Jason a line and get them replaced.

Anyways, luckily the PP510 is a cheap probe and only $10ea and I keep a few in stock just because I do find the odd faulty one.
https://store.siglentamerica.com/product/pp510-1000-mhz-oscilloscope-probe
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod