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 needed.jpg |
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)]
}}
}}
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)
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

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.