Mystery probe
I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one side
of small box integrated with connector, 1/1-1/10 with adjustment hole on other side (calibration?). Three-position switch on probe marked 1 - 10 - G. I assume this is 1x/10x multiplier/ground selector. Google search no help. Can someone give me any info on these? Thanks. |
"Ken_B" @ wrote in message ... | I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one side | of small box integrated with connector, 1/1-1/10 with adjustment hole on | other side (calibration?). Three-position switch on probe marked 1 - 10 - G. | I assume this is 1x/10x multiplier/ground selector. | | Google search no help. Can someone give me any info on these? Thanks. Resistance tip to ground on each setting? N |
Ken posted:
I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one side of small box integrated with connector, 1/1-1/10 with adjustment hole on other side (calibration?). Three-position switch on probe marked 1 - 10 - G. I assume this is 1x/10x multiplier/ground selector. I agree; it sounds like scope probes. The adjustment compensates for the coax attenuation. When using a scope clip the probe to the "calibrate" test pin and observe the scope display. Rotate the variable capacitor via the adjustment hole to display the best squarewave. Don |
Infinity on all three switch positions. Did see an apparent capacitor charge
on 1 and 10. These probes have BNC connectors, by the way. I'm sure they're scope probes. I was hoping to find some specs. "NSM" wrote in message news:bd2xd.5740$KO5.2934@clgrps13... "Ken_B" @ wrote in message ... | I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one side | of small box integrated with connector, 1/1-1/10 with adjustment hole on | other side (calibration?). Three-position switch on probe marked 1 - 10 - G. | I assume this is 1x/10x multiplier/ground selector. | | Google search no help. Can someone give me any info on these? Thanks. Resistance tip to ground on each setting? N |
"Ken_B" @ wrote in message ... | Infinity on all three switch positions. Did see an apparent capacitor charge | on 1 and 10. | | These probes have BNC connectors, by the way. I'm sure they're scope probes. | I was hoping to find some specs. All you can do is connect them to a scope, tweak them with the scopes' calibration port or a square wave generator and them measure the frequency response with a good RF generator. There are 5 million scope probes in the naked city - no way to find the particular specs for these. N |
"Ken_B" bravely wrote to "All" (18 Dec 04 15:40:59)
--- on the heady topic of "Mystery probe" Ke From: "Ken_B" @ Ke I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one Ke side of small box integrated with connector, 1/1-1/10 with adjustment Ke hole on other side (calibration?). Three-position switch on probe Ke marked 1 - 10 - G. I assume this is 1x/10x multiplier/ground selector. Ke Google search no help. Can someone give me any info on these? Thanks. PR 200 is likely 200MHz since I know the PR 100 is 100MHz. It's the best I can offer... A*s*i*m*o*v .... I lurk quietly and carry a big OFF/ON switch. |
Thanks for the replies. The note about the PR 100 was helpful.
Ken "Asimov" wrote in message ... "Ken_B" bravely wrote to "All" (18 Dec 04 15:40:59) --- on the heady topic of "Mystery probe" Ke From: "Ken_B" @ Ke I've acquired a couple of probes marked "PR 200" & "PhilipsECG" on one Ke side of small box integrated with connector, 1/1-1/10 with adjustment Ke hole on other side (calibration?). Three-position switch on probe Ke marked 1 - 10 - G. I assume this is 1x/10x multiplier/ground selector. Ke Google search no help. Can someone give me any info on these? Thanks. PR 200 is likely 200MHz since I know the PR 100 is 100MHz. It's the best I can offer... A*s*i*m*o*v .... I lurk quietly and carry a big OFF/ON switch. |
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