P6202: Difference between revisions
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The '''Tektronix P6202''' is a 500 MHz active 10× FET probe with 50 Ω output impedance. | {{Plugin Sidebar 2 | | ||
title=Tektronix P6202 | | |||
summary=500 MHz Active FET Probe | | |||
image=Image needed.jpg | | |||
caption=Tektronix P6202 | | |||
series=50 Ω scope inputs | | |||
introduced=1976 | | |||
discontinued=(?) | | |||
manuals= | |||
* [http://w140.com/tek_p6202a.pdf Tektronix P6202A Manual (PDF)] | |||
* P6262 non-A manual needed [[Category:Manual needed]] | |||
* [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. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
| Line 5: | Line 18: | ||
{{Spec | Rise time | < 0.7 ns }} | {{Spec | Rise time | < 0.7 ns }} | ||
{{Spec | Attenuation | 10 : 1 (100 : 1 with additional 10× attenuator tip) }} | {{Spec | Attenuation | 10 : 1 (100 : 1 with additional 10× attenuator tip) }} | ||
{{Spec | Input impedance | 10 MΩ // 2 pF | {{Spec | Input impedance | 10 MΩ // 2 pF with or without additional 10× attenuator tip, +2 pF for AC coupling tip }} | ||
{{Spec | Input range | ± 6 V (± 60 V with additional 10× attenuator tip) }} | {{Spec | Input range | ± 6 V (± 60 V with additional 10× attenuator tip) }} | ||
{{Spec | DC Offset range | ± 55 V (± 200 V with additional 10× attenuator tip) }} | {{Spec | DC Offset range | ± 55 V (± 200 V with additional 10× attenuator tip) }} | ||
{{Spec | Max input | ± 200 V (nondestructive) }} | {{Spec | Max input | ± 200 V (nondestructive) }} | ||
{{Spec | Signal cable length | 2 m (6.5') }} | |||
{{EndSpecs}} | {{EndSpecs}} | ||
== | ==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== | |||
<gallery> | |||
</gallery> | |||
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. | |||
<gallery> | |||
File:P6202-risetime-7s12-1ns.jpg | at 1 ns/Div | |||
File:P6202-risetime-7s12-100ps.jpg | at 100 ps/Div | |||
</gallery> | |||
[[Category:Active Oscilloscope Probes]] | [[Category:Active Oscilloscope Probes]] | ||
Revision as of 10:38, 23 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
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.
-
at 1 ns/Div
-
at 100 ps/Div
