P6202: Difference between revisions
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* [http://http://w140.com/Tektronix_P6202_x10_FET-Probe.pdf Tektronix P6202 Manual (PDF)] | |||
* [http://w140.com/tek_p6202a.pdf Tektronix P6202A Manual (PDF)] | * [http://w140.com/tek_p6202a.pdf Tektronix P6202A Manual (PDF)] | ||
* [http://w140.com/tekscope_1976vol8no2_p6202.pdf P6202 Article in 1976 Volume 8 Number 2 Tekscope (PDF)] | * [http://w140.com/tekscope_1976vol8no2_p6202.pdf P6202 Article in 1976 Volume 8 Number 2 Tekscope (PDF)] | ||
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Revision as of 17:58, 10 November 2015
Template:Plugin Sidebar 2 The Tektronix P6202 is a 500 MHz active 10× FET probe with 50 Ω output impedance, introduced in 1976.
The 6202 has its own mains power supply, the 6202A (1980) has a LEMO S-series connector fitting the 7000-series scopes' probe power outlets.
Key Specifications
Bandwidth | DC to 500 MHz (16 Hz lower limit with additional AC coupling tip) |
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Rise time | < 0.7 ns |
Attenuation | 10 : 1 (100 : 1 with additional 10× attenuator tip) |
Input impedance | 10 MΩ // 2 pF with or without additional 10× attenuator tip, +2 pF for AC coupling tip |
Input range | ± 6 V (± 60 V with additional 10× attenuator tip) |
DC Offset range | ± 55 V (± 200 V with additional 10× attenuator tip) |
Max input | ± 200 V (nondestructive) |
Signal cable length | 2 m (6.5') |
Internals
An initial 8 MΩ : 2 MΩ divider drives a dual JFET (source follower + current source), a PNP emitter follower and finally an NPN emitter follower as a cable driver. These stages use SMD components located in the probe tip. The probe control box at the end of the coax only contains a ±7 V regulator, a switchable 50 Ω terminator, and the offset potentiometers that supply ±15 V to the bottom of the input divider. There is no input protection apart from the divider.
Pictures
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Carrying case
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Probe in case, with power supply, 10:1 pre-divider tip, hook tip, AC coupling tip and connection box.
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Amplifier in probe tip (SMD components in 1976!)
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Amplifier in probe tip, reverse
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Connection box
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Case exterior
Measurements
Rise time of a P6202 500 MHz FET probe measured on a 7S12 plugin in a 7844 mainframe (with 25 ps S-52 pulse generator head and 25 ps S-4 sampling head). Measured rise time ~440 ps observed on this specimen is equivalent to 795 MHz bandwidth.
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at 1 ns/Div
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at 100 ps/Div