S-3: Difference between revisions

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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.
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.


==Specifications==
{{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}}


* Input rise time:
==Differences between S-3 and S-3A ==
** 1×: < 350 ps
The S-3A sampling head has a 10× improvement in baseline shift due to cable flexing.
** 10×: < 400 ps
** 100×: < 500 ps
* Input impedance:
** 1×: 100 kΩ || 2.3 pF at low frequency
** 10×: 1 MΩ || 2 pF
** 100×: 1 MΩ || 1.7 pF
* Maximum signal voltage: 2 V<sub>p-p</sub>
* The S-3 does not provide a trigger pickoff for internal triggering.
* An offset voltage of either ±1 V or ±2 V can be selected via a toggle switch on the front panel.
 
== Differences between S-3 and S-3A ==
The S-3A sampling head has a 10&times; improvement in baseline shift due to cable flexing.
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>
S3_frontend.png
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 s3 probe sample bridge.jpg|S-3 probe sampling bridge
Tek s3 sample bridge2.jpg|S-3 probe sampling bridge
</gallery>
</gallery>


[[Category:7000 and 3S series sampling heads]]
[[Category:7000 and 3S series sampling heads]]
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