S-3: Difference between revisions

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(New page: The S3 sampling head is a plug-in head for use with the 7000 series sampling plug-ins or with the Type 3S2/3S5/3S6 samplers. The plug-in includes a permanently attached 1x probe with the s...)
 
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The S3 sampling head is a plug-in head for use with the 7000 series sampling plug-ins or with the Type 3S2/3S5/3S6 samplers. The plug-in includes a permanently attached 1x probe with the sampling bridge enclosed in the probe.
{{Plugin Sidebar
|manufacturer=Tektronix
|series=7000 and 3S series sampling heads
|type=S-3
|summary=Sampling Head
|image=S3a box front.jpg
|caption=S-3A head
|introduced=1969
|discontinued=1989
|manuals=
* [[Media:070-0765-00.pdf|Tektronix S-3 Manual]] (PDF) / [http://bama.edebris.com/download/tek/s3/s3.djvu @ BAMA] (DjVu)
* [[Media:070-1148-01.pdf|Tektronix S-3A Manual]] (PDF)
}}
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.  


The S3 does not provide a trigger pickoff for internal triggering.
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; the optional [[VP-2]] voltage pickoff converts it to a 50 Ω feed-through sampling head.


Input Characteristics
{{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}}


The probe tip input is equivalent to 100k resistor in parallel with about 2.3pF capacitance at low frequency.  
==Differences between S-3 and S-3A ==
The S-3A sampling head has a 10× improvement in baseline shift due to cable flexing.
All other specifications are identical to the ordinary S-3.


An offset voltage of either +/- 1V or +/- 2V can be selected via a toggle switch on the front panel.
The major differences in design involves the gate board in the box part 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 ==
The S-3 probe contains a compensated attenuator before the sampling bridge.
The [[P6038]] does not. 
The S-3 probe has a JFET buffer between the holding cap and the probe cable.
The P6038 does not.
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 ==
Individuals have reported success in replacing the S-3 [[Sampling_diodes|sampling diodes]] with Agilent matched pair Schottky diodes.
 
==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>
S3a attenuator.jpg|010-0364-00 ×10 attenuator for S-3A
S3a box front.jpg|Front
S3a probe external1.jpg|S-3A probe
S3a probe internal1.jpg|S-3A probe internal
S3a probe internal2.jpg|S-3A probe internal
S3a strobe board.jpg|S-3A strobe board
S3a probe_internal_bothsides.jpg|S-3A probe both sides
</gallery>
 
[[Category:7000 and 3S series sampling heads]]

Revision as of 11:40, 21 April 2022

Tektronix S-3
Sampling Head
S-3A head

Compatible with 7000 and 3S series sampling heads

Produced from 1969 to 1989

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

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.

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; the optional VP-2 voltage pickoff converts it to a 50 Ω feed-through sampling head.

Key Specifications

Rise time ≤350 ps (×10, ≤400 ps; ×100, ≤500 ps)
Input impedance 100 kΩ // 2.3 pF (×10, 1 MΩ // 2 pF; ×100, 1 MΩ // 1.7 pF)
Maximum signal 2 Vp-p (×10, 20 Vp-p; ×100, 200 Vp-p)
Maximum safe input max. ±100 V, max. sine input 20 Vp-p (×10 or ×100, max. ±350 V, max. sine input 200 Vp-p)
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

Differences between S-3 and S-3A

The S-3A sampling head has a 10× improvement in baseline shift due to cable flexing. All other specifications are identical to the ordinary S-3.

The major differences in design involves the gate board in the box part 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

The S-3 probe contains a compensated attenuator before the sampling bridge. The P6038 does not. The S-3 probe has a JFET buffer between the holding cap and the probe cable. The P6038 does not. 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

Individuals have reported success in replacing the S-3 sampling diodes with Agilent matched pair Schottky diodes.

Pictures

S-3

S-3A