S-42: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=Optical Sampling Head | | |series=7000 and 3S series sampling heads | ||
image=Tek s42.jpg | | |type=S-42 | ||
caption=S42 Head | |summary=Optical Sampling Head | ||
|image=Tek s42.jpg | |||
introduced=1989 | | |caption=S42 Head | ||
discontinued=1990 | | |introduced=1989 | ||
manuals= | |discontinued=1990 | ||
* [[ | |designers= | ||
[[ | |manuals= | ||
* [[Media:070-7191-00.pdf|S-42 Instruction Manual]] (with schematics) | |||
* [[Media:Tek s-42 specifics ordering information.pdf|S-42 Specifications]] (catalog pages) | |||
}} | }} | ||
The '''Tektronix S-42''' is a sampling head for 1300 nm optical signals. | The '''Tektronix S-42''' is a sampling head for 1300 nm optical signals. It has an [[FC/PC connector|FC/PC fiberoptic connector]] for the input signal. It is essentially an [[S-4]] sampling head with a photodiode at the input. | ||
Specified accuracy is for connections through 8/125 μm single-mode fibre, although a lens in front of the photodiode allows connections using multi-mode fibre as well, at some degradation of response speed. | |||
[[ | The manual shows it being used in a [[7S12]]-driven TDR setup with an external [[OT503|OT503 electro-optic converter]] as the optical signal source. | ||
{{BeginSpecs}} | |||
{{Spec | Pulse response | 55 ps }} | |||
{{Spec | Bandwidth | 6.4 GHz (equiv.) }} | |||
{{Spec | Spectral response | 1000 – 1700 nm }} | |||
{{Spec | Deflection | 50 μW/Div to 50 mW/Div @ 1300 nm }} | |||
{{Spec | Noise equivalent power | 42 μW<sub>RMS</sub> max. }} | |||
{{Spec | Max. nondestructive input | 10 mW mean, 125 mW peak }} | |||
{{Spec | Features | | |||
* Mean power meter, dynamic range 5 nW to 5 mW (60 dB), bandwidth 100 Hz | |||
}} | |||
{{EndSpecs}} | |||
==Link== | |||
{{Documents|Link=S-42}} | |||
{{PatentLinks|S-42}} | |||
==Internals== | |||
The S-42 borrows heavily from the [[S-4]] sampling head, re-using the S-4 strobe, sampler and preamp boards. | |||
It uses the same six-diode traveling-wave sampling gate, strobed by 125 ps pulses generated using a [[snap-off diode]] driven by an avalanche transistor. | |||
The S-4's SMA input connector is still present internally, and driven electrically in some of the calibration procedures, with the photodiode removed. | |||
To accommodate the photo diode, the S-42's case is longer than the S-4's. When inserted, the S-42 therefore protrudes from the base unit by about two centimeters. | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek s-42 a.JPG | |||
Tek s-42 b.JPG | |||
Tek s-42 e.JPG | |||
Tek s-42 d.JPG | |||
Tek s42.jpg | |||
Tek s-42 block diag.png | block diagram | |||
Tek_s-42 schem.png | schematic | |||
s42-spectral-response.jpg | S-42 spectral response | |||
s42-explosion-diagram.jpg | |||
Tek S-42 1989 catalog.png | Description in [[Tek Catalogs|1989 Catalog]] | |||
Tek s-42 uncapped.jpg | |||
</gallery> | </gallery> | ||
[[Category:7000 and 3S series sampling heads]] | [[Category:7000 and 3S series sampling heads]] | ||
[[Category:Optoelectronic instruments]] | |||
Latest revision as of 10:55, 19 June 2024
The Tektronix S-42 is a sampling head for 1300 nm optical signals. It has an FC/PC fiberoptic connector for the input signal. It is essentially an S-4 sampling head with a photodiode at the input.
Specified accuracy is for connections through 8/125 μm single-mode fibre, although a lens in front of the photodiode allows connections using multi-mode fibre as well, at some degradation of response speed.
The manual shows it being used in a 7S12-driven TDR setup with an external OT503 electro-optic converter as the optical signal source.
Key Specifications
| Pulse response | 55 ps |
|---|---|
| Bandwidth | 6.4 GHz (equiv.) |
| Spectral response | 1000 – 1700 nm |
| Deflection | 50 μW/Div to 50 mW/Div @ 1300 nm |
| Noise equivalent power | 42 μWRMS max. |
| Max. nondestructive input | 10 mW mean, 125 mW peak |
| Features |
|
Link
Documents Referencing S-42
- (no results)
Internals
The S-42 borrows heavily from the S-4 sampling head, re-using the S-4 strobe, sampler and preamp boards. It uses the same six-diode traveling-wave sampling gate, strobed by 125 ps pulses generated using a snap-off diode driven by an avalanche transistor.
The S-4's SMA input connector is still present internally, and driven electrically in some of the calibration procedures, with the photodiode removed.
To accommodate the photo diode, the S-42's case is longer than the S-4's. When inserted, the S-42 therefore protrudes from the base unit by about two centimeters.
Pictures
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block diagram
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schematic
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S-42 spectral response
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Description in 1989 Catalog
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