Author Topic: Scope Probe Compatiblity Question  (Read 2903 times)

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Offline Electro FanTopic starter

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Scope Probe Compatiblity Question
« on: August 06, 2013, 09:47:13 pm »
Silly question, but any chance this probe:

http://www.ebay.com/itm/HP-AGILENT-10073C-X10-OSCILLOSCOPE-PROBE-NEW-IN-BAG-/190874921454?pt=LH_DefaultDomain_0&hash=item2c710829ee#ht_2056wt_1093

would work well on a Tektronix 2247A (older analog) scope?
 

Offline c4757p

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Re: Scope Probe Compatiblity Question
« Reply #1 on: August 06, 2013, 09:56:09 pm »
Sure. But it's a bit overkill for a 100 MHz scope.
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alm

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Re: Scope Probe Compatiblity Question
« Reply #2 on: August 06, 2013, 10:27:38 pm »
From the Agilent website:
Compensation range: 6 - 15 pF

I think the 2247A will have approximately 20 pF of input impedance, though I haven't checked. Now the trimmer caps that are responsible for this compensation range are not known for their tight tolerances, so you may get lucky, but you may also not get lucky and then the probe will be unable to compensate to that scope.

A fancier probe can sometimes be nice because of the sharper tip, slimmer body and larger number of compatible accessories. If you wanted accessories to probe SSOP packages, for example, you might be able to find something for an expensive Agilent or Tek probe, but not for a $10 ebay special.
 

Offline Electro FanTopic starter

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Re: Scope Probe Compatiblity Question
« Reply #3 on: August 06, 2013, 10:38:30 pm »
The 2247A is 1M ohm, 20pF up to 400V pk.

I know this probe might be overkill for the 2247A, but I see a new scope over the horizon   :)
 

Offline c4757p

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Re: Scope Probe Compatiblity Question
« Reply #4 on: August 06, 2013, 10:39:37 pm »
Don't miss the bit about compensation that I missed.
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Online macboy

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Re: Scope Probe Compatiblity Question
« Reply #5 on: August 07, 2013, 01:43:56 pm »
alm is spot on about the compensation, the agilent probe, while no doubt a good probes, is not suitable for this scope. It is designed for a scope with less input capacitance than the 20 pF of your Tek.

It is also strange that it has a 2.2 M? input impedance rather than 10 M? as is usual for 10:1 probes. This is probably related to the 500 MHz bandwidth which is pushing the limits of a passive probe.
 


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