EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: ArcticPhoenix0 on March 08, 2020, 02:57:15 am
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Recently unlocked my Siglent 1104X-E to a 1204X-E and realized my probes are only 100MHz. Guess I need some upgrades! What's the best way to go to not limit the BW by the probes?
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ArcticPhoenix0
The probes that come with the scope work fine out to 200Mhz see the below post
https://www.eevblog.com/forum/testgear/siglent-sds1104x-e-in-depth-review/msg1434665/#msg1434665 (https://www.eevblog.com/forum/testgear/siglent-sds1104x-e-in-depth-review/msg1434665/#msg1434665)
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However the link to the study mentioned is about the probes that came with the 1200 series so they would be rated higher than the ones that came with the 1000 seires.
I am suspect about the probes that siglent (or perhaps their dist.) sends out. The ones that came with my 1104xe aren't rated for that model. The next higher priced probes from siglent are matched better spec wise. (but only slightly). I am suspect because a coax to coax gives soooo much better traces, that I'm looking for other probe solutions - even with a self test with the 1k internal signal on the front panel the sent-with probes are dismal.
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However the link to the study mentioned is about the probes that came with the 1200 series so they would be rated higher than the ones that came with the 1000 seires.
Nope.
PP510 are shipped with all 100 MHz Siglent DSO's with one exception, SDS2104X Plus as its -3dB BW point is some 185 MHz so well beyond the typical ~130 MHz of 100 MHz DSO's.
PP215 probes OTOH are just a bit better match for SDS1202X-E and SDS1204X-E that both have -3dB points ~230 MHz
I am suspect about the probes that siglent (or perhaps their dist.) sends out. The ones that came with my 1104xe aren't rated for that model. The next higher priced probes from siglent are matched better spec wise. (but only slightly). I am suspect because a coax to coax gives soooo much better traces
Probes are matched to models at the factory.
Coax connections by virtue of their full shielding will always give good results if used with a properly impedance matched connection.
I'm looking for other probe solutions - even with a self test with the 1k internal signal on the front panel the sent-with probes are dismal.
If signal fidelity is an issue when compensating probes I would first suspect local interference from a SMPS nearby.
Oh, and welcome to the forum.
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Recently unlocked my Siglent 1104X-E to a 1204X-E and realized my probes are only 100MHz. Guess I need some upgrades! What's the best way to go to not limit the BW by the probes?
From an RF guy:
only a dead probe is a good probe. Ground leads, geometry, capacitive loading can cause significant errors already at 200MHz.
If you can, create 50Ohm test ports and use coax connections.