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SD20 Loopthrough Sampling Head
{{Plugin Sidebar
|manufacturer=Tektronix
|series=11800-series scopes
|type=SD-20
|summary=10 GHz Loop-through Sampling Head
|image=Tek sd-20.jpg
|caption=Tektronix SD-20 Sampling Head
|introduced=1989
|discontinued=(?)
|designers=
|manuals=
* [[Media:070-7531-02.pdf|Tektronix SD-20 User Manual]] (PDF)
* [http://w140.com/72nd_ARFTG_Conference_CD.pdf Harper, Ridler, and Salter Paper Discussing TDR with SD-20 (PDF)]
}}
The '''Tektronix SD-20 Loopthrough Sampling Head''' is a single-channel, 20 GHz loop-through sampling head designed for low-loss testing in applications such as microwave systems research and development, digital device characterization and high-speed digital communications circuit design.


From Tektronix' site:
Like the older [[S-6]], the SD-20 is non-terminated and routes the signal of interest directly through the sampling head without the need of a power divider, thus keeping losses to a minimum. The SD-20 can also be used for customized TDR measurements of transmission lines and controlled impedance devices. An external signal generator may be used, instead of the [[SD-24]] step generator, to tailor the TDR stimulus to fit a particular situation. For instance, slower slew rates or higher amplitude may be utilized, or one may perform half-sine or impulse testing.  In digital communications, the SD-20 is useful for viewing and triggering on the clock signal without the use of a power divider.


<blockquote>
{{BeginSpecs}}
The SD20 is a single-channel, 20 GHz loopthrough sampling head designed for low-loss testing in applications such as microwave systems research and development, digital device characterization and high-speed digital communications circuit design. It provides an acquisition rise time of 17.5 ps with typically 750 µVRMS of noise (350 µV with smoothing) to ensure clean, undistorted signals.
{{Spec | Rise time | 17.5 ps }}
</blockquote>
{{Spec | Bandwidth | 20 GHz typ. }}
<blockquote>
{{Spec | Noise | typically 750 µV<sub>RMS</sub>, 1.2 mV<sub>RMS</sub> max. (350 µV typ./550 µV max. with smoothing) }}
The SD20 is nonterminated and keeps losses to a minimum by routing the signal of interest directly through the sampling head without the need of a power divider. The SD20 can also be used for customized TDR measurements of transmission lines and controlled impedance devices. An external signal generator may be used, instead of the SD24 step generator, to tailor the TDR stimulus to fit a particular situation. For instance, slower slew rates or higher amplitude may be utilized, or you may perform half-sine or impulse testing.
{{Spec | Max. input | 1.0 V<sub>p-p</sub> signal, 1.6 V<sub>p-p</sub> (AC+Offset) operating, ±3 V non-destructive }}
</blockquote>
{{Spec | Sampling rate | 100 Hz - 200 kHz }}
<blockquote>
{{Spec | Signal connections | 50 Ω [[3.5 mm connector]]s }}
In digital communications, the SD20 is useful for viewing and triggering on the clock signal without the use of a power divider.
{{EndSpecs}}
</blockquote>


* [http://w140.com/tek_sd-20_user_manual.pdf Tektronix SD-20 User Manual (PDF)]
==Pictures==
* [http://w140.com/72nd_ARFTG_Conference_CD.pdf Harper, Ridler, and Salter Paper Discussing TDR with SD-20 (PDF)]


<gallery>
<gallery>
Image:Tek sd-20.jpg
Tek sd-20.jpg
Tek sd-20 1.jpg
Tek sd-20 2.jpg
Tek sd-20 3.jpg
</gallery>
</gallery>
[[Category:11800 series sampling plugins]]

Revision as of 13:29, 13 August 2021

Tektronix SD-20
10 GHz Loop-through Sampling Head
Tektronix SD-20 Sampling Head

Compatible with 11800-series scopes

Produced from 1989 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix SD-20 Loopthrough Sampling Head is a single-channel, 20 GHz loop-through sampling head designed for low-loss testing in applications such as microwave systems research and development, digital device characterization and high-speed digital communications circuit design.

Like the older S-6, the SD-20 is non-terminated and routes the signal of interest directly through the sampling head without the need of a power divider, thus keeping losses to a minimum. The SD-20 can also be used for customized TDR measurements of transmission lines and controlled impedance devices. An external signal generator may be used, instead of the SD-24 step generator, to tailor the TDR stimulus to fit a particular situation. For instance, slower slew rates or higher amplitude may be utilized, or one may perform half-sine or impulse testing. In digital communications, the SD-20 is useful for viewing and triggering on the clock signal without the use of a power divider.

Key Specifications

Rise time 17.5 ps
Bandwidth 20 GHz typ.
Noise typically 750 µVRMS, 1.2 mVRMS max. (350 µV typ./550 µV max. with smoothing)
Max. input 1.0 Vp-p signal, 1.6 Vp-p (AC+Offset) operating, ±3 V non-destructive
Sampling rate 100 Hz - 200 kHz
Signal connections 50 Ω 3.5 mm connectors

Pictures