P6202: Difference between revisions
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title=Tektronix P6202 | | title=Tektronix P6202 | | ||
summary=500 MHz Active FET Probe | | summary=500 MHz Active FET Probe | | ||
image= | image=Tek-p6202-in-case.jpg | | ||
caption=Tektronix P6202 | | caption=Tektronix P6202 | | ||
series=50 Ω scope inputs | | series=50 Ω scope inputs | | ||
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* [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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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 [[Connectors#Lemo S-series|LEMO connector]] fitting the [[7000-series scopes]]' probe power outlets. | 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 [[Connectors#Lemo S-series|LEMO connector]] fitting the [[7000-series scopes]]' probe power outlets. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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<gallery> | <gallery> | ||
File:Tek-p6202-case-open.jpg | Carrying case | |||
File:Tek-p6202-in-case.jpg | Probe in case | |||
File:Tek-p6202-tip-1.jpg | Amplifier in probe tip (SMD components in 1976!) | |||
File:Tek-p6202-tip-2.jpg | Amplifier in probe tip, reverse | |||
File:Tek-p6202-box1.jpg | Connection box | |||
File:Tek-p6202-box2.jpg | |||
File:Tek-p6202-box3.jpg | |||
File:Tek-p6202-box4.jpg | |||
File:Tek-p6202-case.jpg | Case exterior | |||
</gallery> | </gallery> | ||
===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. | 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. | ||
Revision as of 11:23, 30 April 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 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
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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