P6202

The Tektronix P6202 is a 500 MHz active 10× FET probe with 50 Ω output impedance, introduced in 1976.

Manuals – Specifications – Links – Pictures

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)
Rise time	< 0.7 ns
Attenuation	10 : 1 (100 : 1 with additional 10× attenuator tip, 010-0384-00)
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	± 55 V (± 200 V with additional 10× attenuator tip)
Max input	± 200 V (nondestructive)
Cable length	2 m (6.5')

Links

Documents Referencing P6202

Document	Class	Title	Authors	Year	Links
Tekscope 1976 V8 N2.pdf	Article	A New Low-cost 500 MHz Probe	Ron Lang	1976	P6202

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.

Compatible probe tip to coaxial adapters

While the probe body is wider than regular miniature modular probes, some accessories are compatible.. The manual particularly lists the following adapters:

• 017-0076-00 GR
• 017-0088-00 GR with internal 50 Ω Termination
• 031-0084-01 BNC

Pictures

P6202

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  Carrying case

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  Probe in case, with power supply, 10:1 pre-divider tip (010-0384-00), 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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  Schematic

P6202A

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  Probe power connector

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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