| Products > Test Equipment |
| UNI-T UT-P06 300Mhz passive Probes. Are they any good? |
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| battlecoder:
I recently bought a second hand Agilent/Keysight scope, software-upgraded to 200Mhz bandwidth by the owner, and it came with 150Mhz Keysight probes. Now, a rise-time test seems to indicate that the probes are capable of slightly above 150Mhz bandwidth, but don't really do 200Mhz (kudos to Keysight for having probes that actually match their specs with room to spare). I have ONE 350Mhz probe from another scope (Rigol) that helped me verify that the instrument does indeed have >200Mhz bandwidth, so I think it would be a crime to not have a set of probes that take advantage of the full scope bandwidth. New original Keysight probes are rather expensive, so I was looking at alternatives (for example old Agilent N2863A or N2863B probes, which I'm considering an option). In the process, however, I stumbled upon the Uni-T UT-P06 probes, and there's not really a lot of reviews of them. Even on this forum I was able to find just a couple of mentions of them (but with some typos, like UT-06) and no indication of whether they are good or bad probes. These probes seem to have a compensation range well within the scope's input capacitance so they should work. They are also like $35 a piece, so I'm expecting them to be better than the extremely cheap generic ones from AliExpress, but probably not as good as the original Keysight/Agilent ones. Unlike the Keysight probes the Uni-T ones are x1/x10 switchable, which makes them more flexible but probably also not the best? I would be extremely interested in any performance measurement, review or general opinion from people who have them, or have used them in the past. |
| battlecoder:
A bit of an update: I'm also considering the Texas 250 probes, and the P2200, which despite being 200Mhz are reported to work well up to 400-ish Mhz. I don't like that they are *all* switchable probes, but as long as they meet their specified bandwidth with an acceptably flat response I should be fine. However, if anyone here has a better recommendation for reasonable-quality probes for a 200Mhz scope, that don't cost an eye and a half, please let me know. If I don't get any specific recommendation I guess I'll use my gut (and wallet) to make the decision, and will report back to either warn people or recommend what I got. That way I can make this post useful to others, at the very least. |
| KungFuJosh:
Take a look at probemaster.com instead. Their probes are fantastic, and significantly better than anything UniT has ever conceived (better prices too). |
| battlecoder:
--- Quote from: KungFuJosh on October 05, 2023, 05:48:03 pm ---Take a look at probemaster.com instead. Their probes are fantastic, and significantly better than anything UniT has ever conceived (better prices too). --- End quote --- Thanks for the recommendation! I've heard of probemaster before and it's always been with extremely positive comments. While they might be better than the probes I was looking at, I don't think it's fair to say they have better prices. According to their webpage, the basic fixed 10x, 3.5 feet, 250Mhz probe is already ~$60, while Uni-T's, 300Mhz model is ~$35. A set of 4 probes plus shipping is going to cost me as much as ordering a kit of old stock Agilent probes from eBay (although I would rather have a kit of new quality probes, than old, used probes). Now, $60 for a probe wouldn't be too wild if I only needed one. But I want to (ideally) buy probes for the 4 channels, and at that point this becomes a slightly harder problem. Maybe I should just get like one high quality, high bandwidth probe for one channel of the scope, and use the 150Mhz probes I already have for the 3 remaining channels. Being fully honest the chances of me requiring high-bandwidth measurements for all 4 channels simultaneously are near zero. |
| KungFuJosh:
--- Quote from: battlecoder on October 05, 2023, 07:13:27 pm --- --- Quote from: KungFuJosh on October 05, 2023, 05:48:03 pm ---Take a look at probemaster.com instead. Their probes are fantastic, and significantly better than anything UniT has ever conceived (better prices too). --- End quote --- Thanks for the recommendation! I've heard of probemaster before and it's always been with extremely positive comments. While they might be better than the probes I was looking at, I don't think it's fair to say they have better prices. According to their webpage, the basic fixed 10x, 3.5 feet, 250Mhz probe is already ~$60, while Uni-T's, 300Mhz model is ~$35. A set of 4 probes plus shipping is going to cost me as much as ordering a kit of old stock Agilent probes from eBay (although I would rather have a kit of new quality probes, than old, used probes). Now, $60 for a probe wouldn't be too wild if I only needed one. But I want to (ideally) buy probes for the 4 channels, and at that point this becomes a slightly harder problem. Maybe I should just get like one high quality, high bandwidth probe for one channel of the scope, and use the 150Mhz probes I already have for the 3 remaining channels. Being fully honest the chances of me requiring high-bandwidth measurements for all 4 channels simultaneously are near zero. --- End quote --- Oh, I only did a quick search, and the prices were crazy for the UniT (like $135 for 1 probe). Anyway, get a probemaster master kit (you can get them including 3 or 4 probes). They're worth every penny, and include a little discount. I have a few different kits for my scope, and more kits for my DMMs...it's a bit silly, but they're great. The attachment accessories are awesome. Your scope maxes at 200MHz. Mine maxes at 500MHz, and I still only use 250MHz probes. Active probes are supposed to be much better than passive probes for higher frequencies, so I wouldn't waste money on passives over 250MHz. Most of my probes are the 4905-1RA, but I also have different models for other uses too like the 4902-1RA. I don't have a fixed 1x probe from them yet, so I will probably get the 4903-1 that can do up to 38MHz, which is pretty awesome for a 1x probe. |
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