S-42: Difference between revisions

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 S-42 Instruction Manual (with schematics) S-42 Specifications (catalog pages) (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 μW_RMS 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
schematic
S-42 spectral response
Description in 1989 Catalog

@@ Line 1: / Line 1: @@
-{{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 connector|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.
 {{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&nbsp;nm &ndash; 1700&nbsp;nm }}
+{{Spec | Spectral response         | 1000 – 1700 nm }}
-{{Spec | Deflection | 50&nbsp;μW/Div to 50&nbsp;mW/Div @ 1300&nbsp;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 |
-* 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}}
+==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&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==
@@ Line 50: / Line 51: @@
 Tek s-42 d.JPG
 Tek s42.jpg
-Tek s-42 block diag.png|block diagram
+Tek s-42 block diag.png    | block diagram
-Tek_s-42 schem.png|schematic
+Tek_s-42 schem.png         | schematic
-s42-spectral-response.jpg | S-42 spectral response
+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 1989 catalog.png  | Description in [[Tek Catalogs|1989 Catalog]]
+Tek s-42 uncapped.jpg
 </gallery>
 [[Category:7000 and 3S series sampling heads]]
 [[Category:Optoelectronic instruments]]