Products > Test Equipment
PRP1 - Low cost 2GHz power rail probe
tszaboo:
--- Quote from: nctnico on September 06, 2024, 03:56:53 pm ---
--- Quote from: tszaboo on September 04, 2024, 06:50:12 pm ---
--- Quote from: Neganur on September 04, 2024, 11:10:18 am ---I'd pledge 100 for just the populated PCB, no need for cables or enclosure.
--- End quote ---
I'm not planning on selling this with a discount.
What I can offer is a free unit, in exchange for writing a review here, and verifying the performance of the probe.
I think you have the test equipment to do that?
--- End quote ---
Before anything, I think it is a good idea to figure out what kind of industry standard testing method exists for these kind of probes so specifications / test results can be compared with other probes.
--- End quote ---
I agree, I was going to put all that documentation on Github, including my test setups and results. And instruction manual.
There is a performance verification guide in the instruction manual of a Tek probe:
https://download.tek.com/manual/TPR1000-and-TPR4000-User-Manual-077154200.pdf
From page 26. It gives a good baseline on what to measure. I found because of the changing input resistance of the probe (which is the whole point of it) measuring it was quite challenging. The high frequency verification seems to be just sweeping it with a VNA and finding the -3dB point. Which seems to be above 2 GHz in my case, but I still want to sweep the final design with a higher quality VNA before calling it faster. Using a SMA calibration standard on the probe's output. With a scope it's slower anyway, with a 50 Ohm adapter + regular scope input, I think it's limited to about 200 MHz. With a 50 Ohm input scope it should reach the scope's nameplate speed.
tautech:
--- Quote from: tszaboo on August 23, 2024, 10:49:12 am ---
--- Quote from: tautech on August 23, 2024, 10:05:33 am ---Nice, OP image needs resizing....good you've done it.
Dunno what it is but we have one coming soon too, a 4 GHz version.
Wanna know the specs of what you're up against ?
--- End quote ---
Thanks. I'm eager to find out.
There are many benefits of using a factory built probe, it tells you on the screen what the voltage you are looking at, and with the active probe it's a better interface.
Still, I hope people with low-end scopes or budget will be able to use a probe like this.
--- End quote ---
Complete specs available now:
https://int.siglent.com/u_file/images/24_09_10/SAP4000P_UserManual_EN01A.pdf
Yours will be a much lower cost version......
tszaboo:
--- Quote from: tautech on September 10, 2024, 08:41:51 am ---
--- Quote from: tszaboo on August 23, 2024, 10:49:12 am ---
--- Quote from: tautech on August 23, 2024, 10:05:33 am ---Nice, OP image needs resizing....good you've done it.
Dunno what it is but we have one coming soon too, a 4 GHz version.
Wanna know the specs of what you're up against ?
--- End quote ---
Thanks. I'm eager to find out.
There are many benefits of using a factory built probe, it tells you on the screen what the voltage you are looking at, and with the active probe it's a better interface.
Still, I hope people with low-end scopes or budget will be able to use a probe like this.
--- End quote ---
Complete specs available now:
https://int.siglent.com/u_file/images/24_09_10/SAP4000P_UserManual_EN01A.pdf
Yours will be a much lower cost version......
--- End quote ---
Looks like a very nice bit of kit.
Any of these probes, especially the "low speed probe browser" would be an excellent accessory for my design.
The high speed browser is an interesting design, I wonder if we can learn something from it's construction.
BTW
"5.3 Pigtail Cable Welding" - you might want to correct this it's a very obvious translation mistake from Mandarin.
tszaboo:
I got a package, it was the assembled board of the PRP1.
So I quickly went ahead and put the probe together.
It went through a few tests, and the noise and +24V and -24V cancellation worked on the probe.
SWR was also <1.5 below 2.5GHz. Crossover frequency showed a small bump, which was still within 0.25dB, or 3% gain error, which is quite acceptable. I only had these for about an hour now. Next few days, I document my testing method and results.
USB port is a bit deep, but all the cables I tested worked.
nctnico:
USB-C sockets come in different lengths / depths. So as long as the plug is long enough for your design, it should work.
Side note: I have come across USB-C sockets which where too long for any plug to mate. I had to grid a few mm away those.
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