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{{Plugin Sidebar 2 |
{{Plugin Sidebar
title=Tektronix S-42 |
|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  
series={{3S+7S}} |
|image=Tek s42.jpg  
introduced=1989 |
|caption=S42 Head  
discontinued=1990 |
|introduced=1989  
manuals=
|discontinued=1990  
* [[Media:S42.pdf | S-42 manual with schematics]]
|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. It has an [[FC/PC fiberoptic connector]]  
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.
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 micron single-mode fibre, although  
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.
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.
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}}
{{BeginSpecs}}
{{Spec | Pulse response | 55 ps }}
{{Spec | Pulse response           | 55 ps }}
{{Spec | Bandwidth | 6.4 GHz (equiv.) }}
{{Spec | Bandwidth                 | 6.4 GHz (equiv.) }}
{{Spec | Spectral response | 1000 nm – 1700 nm }}
{{Spec | Spectral response         | 1000 – 1700 nm }}
{{Spec | Deflection | 50 μW/Div to 50 mW/Div @ 1300 nm }}
{{Spec | Deflection               | 50 μW/Div to 50 mW/Div @ 1300 nm }}
{{Spec | Noise equivalent power | 42&nbsp;μW<sub>RMS</sub> max. }}
{{Spec | Noise equivalent power   | 42 μW<sub>RMS</sub> max. }}
{{Spec | Max. nondestructive input | 10&nbsp;mW mean, 125&nbsp;mW peak }}
{{Spec | Max. nondestructive input | 10 mW mean, 125 mW peak }}
{{Spec | Features |  
{{Spec | Features |  
* Mean power meter, dynamic range 5&nbsp;nW to 5&nbsp;mW (60&nbsp;dB), bandwidth 100&nbsp;Hz
* Mean power meter, dynamic range 5 nW to 5 mW (60 dB), bandwidth 100 Hz
}}
}}
{{EndSpecs}}
{{EndSpecs}}
==Link==
{{Documents|Link=S-42}}
{{PatentLinks|S-42}}


==Internals==
==Internals==


The S-42 borrows heavily from the [[S-4]] sampling head, re-using the S-4 strobe, sampler and preamp boards.
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&nbsp;ps
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.
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
The S-4's SMA input connector is still present internally, and driven electrically in some of the calibration procedures, with the photodiode removed.
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,
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.
the S-42 therefore protrudes from the base unit by about two centimeters.


==Pictures==
==Pictures==


<gallery>
<gallery>
File:Tek s-42 a.JPG
Tek s-42 a.JPG
File:Tek s-42 b.JPG
Tek s-42 b.JPG
File:Tek s-42 e.JPG
Tek s-42 e.JPG
File:Tek s-42 d.JPG
Tek s-42 d.JPG
File:Tek s42.jpg
Tek s42.jpg
File:s42-spectral-response.jpg | S-42 spectral response
Tek s-42 block diag.png    | block diagram
File:s42-explosion-diagram.jpg
Tek_s-42 schem.png        | schematic
File:Tek S-42 1989 catalog.png|Description in [[Tek Catalogs|1989 Catalog]]
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]]
[[Category:Optoelectronic instruments]]

Latest revision as of 10:55, 19 June 2024

Tektronix S-42
Optical Sampling Head
S42 Head

Compatible with 7000 and 3S series sampling heads

Produced from 1989 to 1990

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

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
  • Mean power meter, dynamic range 5 nW to 5 mW (60 dB), bandwidth 100 Hz

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

  • block diagram

    block diagram

  • schematic

    schematic

  • S-42 spectral response

    S-42 spectral response

  • Description in 1989 Catalog

    Description in 1989 Catalog

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