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The Tektronix 4S2 is a two-channel [[sampling oscilloscope|sampling]] vertical plug-in for the [[661]]. | {{Plugin Sidebar | ||
Signals enter the 4S2 through [[ | |manufacturer=Tektronix | ||
|series=661 | |||
|type=4S2 | |||
|summary=Dual channel sampling plugin | |||
|image=4s2 3.jpg | |||
|caption=4S2 | |||
|introduced=1962 | |||
|discontinued=(?) | |||
|designers=George Frye; | |||
|manuals= | |||
* [[Media:070-356.pdf|Tektronix 4S2 Manual]] | |||
* [[Media:070-0536-00.pdf|Tektronix 4S2A Manual]] | |||
'''Calibration''' | |||
* [[Media:Tek 4s2 cal outline.pdf|Tektronix 4S2 Calibration Outline]] (OCR) | |||
* [https://w140.com/tek_fcp/tek_type_4s2_factory_cal_proc.pdf Tektronix 4S2 Field Recalibration Procedure] | |||
* [https://w140.com/tek_fcp/tek_type_4s2_tentative_factory_cal_proc.pdf Tektronix 4S2 Factory Calibration Procedure] | |||
* [[Media:tek_4s2a_eng_spec.pdf|Tektronix 4S2A Engineering Spec]] (OCR) | |||
}} | |||
The '''Tektronix 4S2''' is a two-channel [[sampling oscilloscope|sampling]] vertical plug-in for the [[661]]. | |||
Signals enter the 4S2 through [[GR-874 connector]]s on the front panel. | |||
Unlike the [[4S1]], the 4S2's signal path does not contain a [[delay line]] between the input connector and the sampler. | |||
This has the advantage of maintaining higher pulse fidelity and thus higher bandwidth, but the disadvantage of making it impossible to see the leading edge of the triggering event unless a pre-trigger is used. | |||
The 4S2, which was designed in 1962, uses a four-diode sampling bridge. | |||
The 4S2A, designed in 1965, uses a two-diode sampling bridge. | |||
This design change is discussed in the 4S2A Engineering Spec document linked below. | |||
The 4S2 does not provide trigger pick-off. The 4S2A provides trigger pick-off for channel A. | |||
The 4S2 and 4S2A front panels look the same, but they use different GR-874 input connectors. | |||
The 4S2 uses a short airline unique to the 4S2. | |||
The 4S2A uses the connector-to-board system described in [[Patent US 3426311A|US Patent 3,426,311]] and has some parts in common with the [[3T7]]. | |||
{{BeginSpecs}} | |||
{{Spec | Bandwidth | DC to 3.9 GHz }} | |||
{{Spec | Rise time | 90 ps }} | |||
{{Spec | Deflection | 2 mV/Div to 200 mV/Div, 1−2−5 }} | |||
{{EndSpecs}} | |||
==See Also== | |||
* [[4S2 Pulser]] | |||
==Pictures== | |||
===4S2=== | |||
<gallery> | |||
Tek 4s2 front straight.jpg|4S2 | |||
4s2 3.jpg|4S2 | |||
4s2 2.jpg|4S2 | |||
4s2 1.jpg|4S2 | |||
4s2 4.jpg|4S2 | |||
Tek 4s2 avalanche pulse components.jpg|4S2 Pulse Generator | |||
Tek 4s2 avalanche pulse1.jpg|4S2 Pulse Generator | |||
Tek 4s2 avalanche pulse2.jpg|4S2 Pulse Generator | |||
Tek 4s2 avalanche pulse4.jpg|4S2 Pulse Generator | |||
Tek 4s2 sampler.jpg|4S2 Sampler | |||
Tek 4s2 sampler2.jpg|4S2 Sampler | |||
Tek 4s2 ac amplifier outside.jpg|AC Amplifier | |||
Tek 4s2 ac amplifier components.jpg|AC Amplifier | |||
Tek 4s2 memory outside.jpg|Memory | |||
Tek 4s2 memory components.jpg|Memory | |||
Tek 4s2 inverter outside.jpg|Inverter | |||
Tek 4s2 inverter components.jpg|Inverter | |||
Tek 4s2 dual-trace outside.jpg|Dual Trace | |||
Tek 4s2 dual-trace components.jpg|Dual Trace | |||
Tek 4s2 left front inside.jpg|4S2 | |||
Tek 4s2 input connector.jpg|4S2 | |||
Tek 4s2 front right wiring.jpg|4S2 | |||
Tek 4s2 front 32.jpg|4S2 | |||
Tek 4s2 front bottom.jpg|4S2 | |||
Tek 4s2 bottom wiring.jpg|4S2 | |||
Tek 4s2 samplers.jpg|4S2 Samplers | |||
Tek 4s2 top cards.jpg|4S2 Top | |||
Tek 4s2 top front.jpg|4S2 Top Front | |||
Tek 4s2 top.jpg|4S2 Top | |||
Tek 4S2 var pots and pulse generator connections.jpg|Pulse Generator Card Removed, Var Gain Pots | |||
Tek 4s2 rear.jpg|4S2 Rear | |||
</gallery> | |||
===4S2A=== | |||
<gallery> | <gallery> | ||
Tek 4s2a front.jpg|4S2A Front | |||
Tek 4s2a sampler.png|42SA sampler schematic | |||
Tek 4s2a pulse gen.png|42SA pulse generator schematic | |||
Tek 4s2a pulse generator front.jpg|4S2A Pulse Generator Front | |||
Tek 4s2a pulse generator rear.jpg|4S2A Pulse Generator Rear | |||
Tek 4s2a gate board 2.jpg|4S2A Gate (Sampler) Board | |||
Tek 4s2a gate board.jpg | |||
Tek 661 4s2a 5t3 s-52.jpg|4S2A step response driven by [[S-52]]. 100 ps/div. | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|4S2}} | |||
{{Parts|4S2A}} | |||
[[Category:661 plugins]] | |||
[[Category:Sampling plugins]] | |||
[[Category:GR874]] |