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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=Sampling Head | | |series=7000 and 3S series sampling heads | ||
image=S3a box front.jpg | | |type=S-3 | ||
caption=S-3A head | |summary=Sampling Head | ||
|image=S3a box front.jpg | |||
introduced=1969 | | |caption=S-3A head | ||
discontinued=1989 | | |introduced=1969 | ||
manuals= | |discontinued=1989 | ||
* [ | |manuals= | ||
* [ | * [[Media:070-0765-00.pdf|Tektronix S-3 Manual]] (OCR) | ||
* [[Media:Tek s-3 whole foldouts.pdf|Tektronix S-3 Manual Foldouts]] (whole, color) | |||
* [[Media:Tek s-3 mod at sn b020120.pdf|Tektronix S-3 Modification at Serial Number B020120]] | |||
* [[Media:070-1148-00.pdf|Tektronix S-3A Manual]] (070-1148-01 also exists) | |||
}} | }} | ||
The '''Tektronix S-3 sampling head''' is a plug-in head for use with the | The '''Tektronix S-3 sampling head''' is a plug-in head for use with the 7000 series sampling plug-ins or the Type [[3S2]], [[3S5]], and [[3S6]] samplers. | ||
7000 series sampling plug-ins or the Type [[3S2]], [[3S5]], and [[3S6]] samplers. | |||
The plug-in includes a permanently attached 1× probe with the sampling bridge enclosed in the probe. | The plug-in includes a permanently attached 1× probe with the sampling bridge enclosed in the probe. | ||
Optional 10× or 100× attenuator tips (010-0364-00, 010-0365-00) provide extended input voltage range. | Optional 10× or 100× attenuator tips (010-0364-00, 010-0365-00) provide extended input voltage range; the optional [[VP-2]] voltage pickoff converts it to a 50 Ω feed-through sampling head. | ||
{{BeginSpecs}} | |||
{{Spec | Rise time | ≤350 ps (×10, ≤400 ps; ×100, ≤500 ps) }} | |||
{{Spec | Input impedance | 100 kΩ // 2.3 pF (×10, 1 MΩ // 2 pF; ×100, 1 MΩ // 1.7 pF) }} | |||
{{Spec | Maximum signal | 2 V<sub>p-p</sub> (×10, 20 V<sub>p-p</sub>; ×100, 200 V<sub>p-p</sub>) }} | |||
{{Spec | Maximum safe input | max. ±100 V, max. sine input 20 V<sub>p-p</sub> (×10 or ×100, max. ±350 V, max. sine input 200 V<sub>p-p</sub>) }} | |||
{{Spec | Features | | |||
* no trigger pickoff for internal triggering | |||
* offset voltage of either ±1 V or ±2 V (at ×1) can be selected via a toggle switch on the front panel | |||
}} | |||
{{EndSpecs}} | |||
==Differences between S-3 and S-3A == | |||
The S-3A sampling head has a 10× improvement in baseline shift due to cable flexing. | |||
== Differences between S-3 and S-3A == | |||
The S-3A sampling head has | |||
All other specifications are identical to the ordinary S-3. | All other specifications are identical to the ordinary S-3. | ||
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but some changes are also made to the circuits in the body of the probe. | but some changes are also made to the circuits in the body of the probe. | ||
== Difference between the S-3 and the P6038 == | ==Difference between the S-3 and the P6038 == | ||
The S-3 probe contains a compensated attenuator before the sampling bridge. | The S-3 probe contains a compensated attenuator before the sampling bridge. | ||
The [[P6038]] does not. | The [[P6038]] does not. | ||
The S-3 probe has a JFET buffer between the holding cap and the probe cable. | The S-3 probe has a JFET buffer between the holding cap and the probe cable. | ||
The P6038 does not. | The P6038 does not. | ||
Both use the [[152-0368-00]] sampling bridge. | Both use the [[152-0368-00]] sampling bridge. The sampling pulse is generated by a [[snap-off diode]] ([[152-0368-00]]). | ||
== Repair of Sampling Diodes == | == Repair of Sampling Diodes == | ||
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==Pictures== | ==Pictures== | ||
'''S-3''' | |||
<gallery> | |||
Tek s3 probe sample bridge.jpg|S-3 probe sampling bridge | |||
Tek s3 sample bridge2.jpg|S-3 probe sampling bridge | |||
S3_frontend.png | S-3 frontend circuit | |||
</gallery> | |||
'''S-3A''' | |||
<gallery> | <gallery> | ||
S3a attenuator.jpg|010-0364-00 ×10 attenuator for S-3A | S3a attenuator.jpg|010-0364-00 ×10 attenuator for S-3A | ||
S3a box front.jpg|Front | S3a box front.jpg|Front | ||
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S3a strobe board.jpg|S-3A strobe board | S3a strobe board.jpg|S-3A strobe board | ||
S3a probe_internal_bothsides.jpg|S-3A probe both sides | S3a probe_internal_bothsides.jpg|S-3A probe both sides | ||
Tek | Tek s-3a risetime.jpg|S-3A showing 280 ps risetime when probing a 50 Ω impedance with no probe attenuators. | ||
</gallery> | </gallery> | ||
[[Category:7000 and 3S series sampling heads]] | [[Category:7000 and 3S series sampling heads]] | ||
[[Category:Manual needed]] (S-3A) |