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Re: Testing Scope Probes
Jmr, The 3.5Ghz known-good probe is a *passive* one! And the other chap who said it was a 400Mhz scope - it's the 350Mhz model in fact.
By Jinxie · #143319 ·
Re: Testing Scope Probes
There seems to be lots of anecdotal evidence in the responses, and a few technical problems with the measurement setup of his original post. Is he following any one of many documented procedures
By VE6WMR · #143318 ·
Re: Testing Scope Probes
OK thanks. Bear in mind that tests are being done up to 500MHz and your T piece method relies on the voltage at both probe inputs being the same. This is in some doubt if you use a completely
By jmr · #143317 ·
Re: Testing Scope Probes
LeCroy makes a test fixture, part # PCF200 that is just the ticket for testing high frequency ¡®scope probes. You can view pictures of it using the Googly what¡¯s it on the InterWeb Thingy. It has
By billyatams · #143316 ·
Re: Testing Scope Probes
@JMR If you read Jinxie's first post to this thread you will find she does have a "good" probe: "The scope I am using for this test is a 350Mhz Tek analog one and it can 'see' waveforms perfectly
By Robert G8RPI · #143315 ·
Re: Testing Scope Probes
There's a nice app note about probe impedance and using them by HP: It has a comparison of tek and HP probes that does not include the 10073C, but shows the concepts with examples and charts...all
By John Griessen · #143314 ·
Re: Testing Scope Probes
Honestly Jinxie, you did. That is why you started asking questions. If everything looked right to you, you wouldn't have thought a thought about it. -Chuck
By Chuck Harris · #143313 ·
Re: Testing Scope Probes
You can try the T piece method as long as you accept that it won't actually demonstrate the expected bandwidth of the probe. It will show differences between the probes. You will have to be wary of
By jmr · #143312 ·
Re: HP/Symmetricom 58531A GPS Timing Receiver Analysis & Control software
Thanks, Robert. When I have the time to jump through all of Microchip's hoops I will investigate. Greg
By Greg Muir · #143311 ·
Re: Testing Scope Probes
Perhaps I can combine elements of the best methodology from posters here to get the best results. The thing I'm concerned about with using T adaptors is I don't know what they're specified to. I've
By Jinxie · #143310 ·
Re: Anyone with a 3586B A80 board?
FYI - I got the mainboard off the unit last night.? For those who may have this issue in the future, it is possible to get this board off without removing all of the cards.? You do have to remove
By Matt Harris · #143309 ·
Re: Testing Scope Probes
Please define the 'known good probe' in your test setup? Does Jinxie have one? I thought the aim of the exercise was to demonstrate the BW of the ebay probe. If you put two probes in parallel and
By jmr · #143308 ·
Re: HP 05315-60007
It is the optioal 10MHz TCXO for the HP 5315 Counter. It's covered in the service data.
By Michael A. Terrell · #143307 ·
Re: Testing Scope Probes
JMR said: "The problem with trying to do this with two probes in parallel (using a BNC T piece) is that you will end up with double the loading so I'd expect this test method to be doomed to failure
By Robert G8RPI · #143306 ·
HP 05315-60007
What device(s) was this oscillator made for?? Is there any documentation for checking whether the board functions correctly?? The board is marked SERIES 1824. Thanks -- Joe White KW4YW
By Joe White · #143305 ·
I/O Interconnect cord on HP8703A
Hello, Does anyone can confirm that the I/O-interconnect cord between the HP8703A and its lightwave test set is the same cord as between an HP8753A and its S parameter test set HP85046A or between
By f1ghb · #143304 ·
Re: Testing Scope Probes
A passive scope probe is more complex the just a resistor divider. Take a look at the original patent for a scope probe. Allen Hill KI4QCK
By Allen Hill · #143303 ·
Re: Testing Scope Probes
Anyone who has tried to measure one, that's who! ;)? ? ? ? ? ? ?Jim Ford?Sent from my T-Mobile 4G LTE Device
By Jim Ford · #143302 ·
Re: Optiion upgrade HP 8753C/B
Just in case this helps someone else I've found it now. My A9 board looks like the one here https://jvgavila.com/hp8753c.htm And as described in the link, the procedure IS detailed in the service
By vee-dub565 · #143301 ·
Re: Testing Scope Probes
Gosh! Who'd a thought testing a passive probe could be so tricky?
By Jinxie · #143300 ·