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The '''Tektronix Type S-311''' Programmable Dual-Trace Sampling Plug-In Unit
{{Plugin Sidebar
is a [[560-series plug-ins|560-series plug-in]] designed for use in a [[567]]  
|manufacturer=Tektronix
as part of a Tektronix [[S-2000]] and [[S-3000]]­ series automated test systems.
|series=560-series scopes
|type=S-311
|summary=Programmable dual-trace sampling plug-in
|image=Tek s-311 photo.png
|caption=S-311 Front View
|introduced=1965
|discontinued=(?)
|designers=
|manuals=
* [[Media:070-0468-01.pdf|Tektronix S-311 Manual]]
}}
The '''Tektronix S-311''' is a [[560-series plug-ins|560-series plug-in]] designed for use in a [[567]] as part of a Tektronix [[S-2000]] or [[S-3000]]­ series automated test systems.


In contrast to the [[3S6]] which uses external sampling heads,
In contrast to the [[3S6]], which uses external sampling heads, the S-311 contains two samplers internally, like the [[3S76]] and the [[3S1]].
the S-311 contains two samplers internally, like the [[3S76]] or [[3S1]].
However, unlike the 3S76 and 3S1, the S-311 gets its signal inputs via [[BNC connector]]s on the rear panel.
However, unlike the 3S76 and 3S1, the S-311 gets its signal inputs via
[[BNC connector]]s on the rear panel.
The input impedance of each input is 50 Ω.
The input impedance of each input is 50 Ω.


When the S-311 is inserted into the mainframe, its BNC input connectors must be manually connected,
When the S-311 is inserted into the mainframe, its BNC input connectors must be manually connected, as they are not designed to pair with a corresponding connector in the plug-in bay bulkhead.
as they are not designed to pair with a corresponding connector in the plug-in bay bulkhead.
The [[567]] mainframe has holes in the plug-in bay bulkhead at the location of the signal input connectors and programming connector of the S-311.
The [[567]] mainframe has holes in the plug-in bay bulkhead at the location
of the signal input connectors and programming connector of the S-311.


The remote programmability of the S-311 typically involves a [[262|Type 262]] programmer]].
The remote programmability of the S-311 typically involves a [[262|Type 262 programmer]].
Remote programming can control the mV/div, voltage offset, and mode,
Remote programming can control the mV/div, voltage offset, and mode, i.e., channel A, channel B, or dual-trace.
i.e., channel A, channel B, or dual-trace.
The Type 262 controls the DC currents in the coils of six reed relays in the S-311.
The Type 262 controls the DC currents in the coils of six reed relays in the S-311.


The S-311 can be thought of as a [[3S76]] with remote programmability,
The S-311 can be thought of as a [[3S76]] with remote programmability, connectors on the rear, no delay, and no trigger pickoff.
connectors on the rear, no delay, and no trigger pickoff.
Component numbers are the same in the two models.
Component numbers are the same in the two models.
The S-311 and 3S76 both have 0.4 nanosecond risetimes.
The S-311 and 3S76 both have 0.4 nanosecond risetimes.
The sampler in the S-311 uses four Tek-made GaAs diodes.
The [[sampler]] in the S-311 uses four Tektronix-made GaAs diodes.


The S-311 does not contain a signal delay.
The S-311 does not contain a signal delay.
The BNC signal input connectors on the rear panel of the S-311
The BNC signal input connectors on the rear panel of the S-311 are connected by short coaxial cables to the sampling bridge.
are connected by short coaxial cables to the sampling bridge.


==Manuals ==
* [[Media:070-0468-01.pdf|Tektronix S-311 Manual (PDF)]]
==Pictures ==
==Pictures ==
<gallery>
<gallery>
Tek s-311 photo.png|Front view. Low photo quality makes it impossible to discern the perimeter of the faceplate. It is standard 560-series size.
Tek s-311 photo.png | Front View: Low photo quality makes it hard to discern the perimeter of the faceplate. It is standard 560-series size.
Tek s-311 right.jpg|Right view.
Tek s-311 right.jpg | Right View
Tek s-311 left.jpg|Left view.
Tek s-311 left.jpg | Left View
Tek s-311 relays.jpg|Reed relays.
Tek s-311 relays.jpg | Reed Relays
Tek s-311 rear.jpg|Rear view.
Tek s-311 rear.jpg | Rear View
Tek_567_plug-in_connectors.jpg|Rear view from underneath of [[567]] plug-in bay bulkhead. Holes allow for S-311 signal input and programming signal connections.
Tek_567_plug-in_connectors.jpg | Rear view from underneath the [[567]] plug-in bay bulkhead. Holes allow for S-311 signal input and programming signal connections.
Tek s-311 no knobs.jpg | S-311 with knobs removed
</gallery>
</gallery>
{{BetterPics}}
==Components==
{{Parts|S-311}}


[[Category:560 series plugins]]
[[Category:560 series plugins]]
[[Category:Sampling plugins]]
[[Category:Sampling plugins]]
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