P410: Difference between revisions
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These probes were [[Introduced in 1955]] along with the [[541|Type 541]] and [[545|Type 545]] scopes because at 30MHz the [[P510|P510A]]'s 50-ohm coax cable exhibited unacceptable ringing due to the impedance mismatch at the scope's 1 MΩ input. It uses a special cable with a very thin, high-resistance center conductor which creates a better impedance match. All subsequent high-impedance probes use this kind of cable. | These probes were [[Introduced in 1955]] along with the [[541|Type 541]] and [[545|Type 545]] scopes because at 30MHz the [[P510|P510A]]'s 50-ohm coax cable exhibited unacceptable ringing due to the impedance mismatch at the scope's 1 MΩ input. It uses a special cable with a very thin, high-resistance center conductor which creates a better impedance match. All subsequent high-impedance probes use this kind of cable. | ||
The catalog excerpt below is from 1957. | |||
* [http://w140.com/tekwiki/images/7/7a/P400-Series_Probes_1957.png] | * [http://w140.com/tekwiki/images/7/7a/P400-Series_Probes_1957.png] | ||
[[Category:1 MOhm Oscilloscope Probes]] | [[Category:1 MOhm Oscilloscope Probes]] | ||
Revision as of 08:54, 4 August 2017
The Tektronix P410 is a 10x passive voltage probe. Maximum voltage is 600 V peak-to-peak. It connects to the scope with a UHF connector.
The "P400 Series" (not to be confused with the modern P400 probe) also includes P405 (5x), P420 (20x), P450 (50x), P450-L (50x extra low capacitance), and P4100 (100x).
These probes were Introduced in 1955 along with the Type 541 and Type 545 scopes because at 30MHz the P510A's 50-ohm coax cable exhibited unacceptable ringing due to the impedance mismatch at the scope's 1 MΩ input. It uses a special cable with a very thin, high-resistance center conductor which creates a better impedance match. All subsequent high-impedance probes use this kind of cable.
The catalog excerpt below is from 1957.
![[1]](http://w140.com/tekwiki/images/7/7a/P400-Series_Probes_1957.png){kind=link}