Products > Test Equipment
Oscilloscope Dilemma
tautech:
--- Quote from: rstofer on December 05, 2022, 02:06:03 am ---
Buy the Siglent SDS1202X-E for $399 and call it even. You will be happy you did!
https://siglentna.com/digital-oscilloscopes/sds1000x-e-series-super-phosphor-oscilloscopes/
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FYI, these are on special until years end:
https://siglentna.com/product/sds1202x-e/
james_s:
--- Quote from: JOFlaherty on December 05, 2022, 12:58:36 am ---With a modern digital scope, you get an accurate frequency counter and time interval meter built in, and on-screen display of time and voltage values without having to count divisions on the screen.
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There are analog scopes that offer that too, although they are less common.
2N3055:
I don't know if SDS2202X-E is on sale anywhere, but that one goes to 350 Mhz (more in reality) and would show 432 MHz without problem...
tautech:
--- Quote from: 2N3055 on December 05, 2022, 06:10:09 am ---I don't know if SDS2202X-E is on sale anywhere, but that one goes to 350 Mhz (more in reality) and would show 432 MHz without problem...
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I did some screenshots for a thread here a while back with SDS2202X-E and pushed to well beyond 400 MHz which is getting close to it aliasing but its frequency counter went a few 100 MHz further if the amplitude was sufficient on the display despite it being well past rated BW......missing my SSG3021X, now sold. :(
Edit to add.
Thread link where we tested the BW of a few DSO's and SDS2202X-E here.
https://www.eevblog.com/forum/testgear/dso-bandwidth-test-sds1104x-e-dsox1102g-to1104-gds1054b/msg2391324/#msg2391324
Aliasing was not obvious to me however rf-loop put me straight.
Andy2:
--- Quote from: baldurn on December 04, 2022, 04:43:13 pm ---
--- Quote from: Andy2 on December 04, 2022, 02:57:20 pm ---I've only speed-read this thread, so sorry if someone has already made this point. If you are a radio amateur (like me), at some point you will probably use your 'scope to view your outgoing signal. This is a trivial task for an analogue scope, but for DSO's it can be a difficult job and it will start aliasing and you'll not get the familiar 'AM envelope' display. The way around this is to get one with plenty of screen memory (ie it can store lots of 'points'). My Rigol has 14 million points and will show a good AM display on 160m (1.8 MHz) and up to maybe 10 MHz or so, but beyond this it looks worse than my old Tek analogue. So when you are inspecting the manufacturer's boast-sheets, look for the 'Memory Depth' spec and aim high. Hope this helps, it had me befuddled for ages....
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I am not sure what you are doing wrong, but my DSO has no trouble at all displaying a typical AM signal. Here is a photo of a 29 MHz (10 meters) signal modulated by 1 kHz at 50%:
(Attachment Link)
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That's interesting, Baldurn. How many points is the trace memory? As I said, things improve with more memory. My Rigol has 14 M points, which was a decent amount when I bought it, but these days scopes tend to have a lot more.
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