7S12: Difference between revisions
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{{Plugin Sidebar| | {{Plugin Sidebar 2| | ||
title=Tektronix 7S12| | title=Tektronix 7S12| | ||
summary=Time Domain Reflectometer / Sampler| | summary=Time Domain Reflectometer / Sampler| | ||
image= | image=tek_7s12_with_heads.jpg| | ||
caption=Tektronix 7S12 TDR/Sampler with [[S-6]] and [[S-52]] heads| | caption=Tektronix 7S12 TDR/Sampler with [[S-6]] and [[S-52]] heads| | ||
introduced=1971 | | |||
discontinued=1989 | | |||
series=[[7000-series scopes]]| | series=[[7000-series scopes]]| | ||
manuals= | manuals= | ||
Line 16: | Line 16: | ||
The 7S12 has two bays for [[:Category:7000 and 3S series sampling heads|S-series plug-in modules ("heads")]]. The right bay accepts a pulse generator or a trigger recognizer plug-in, whereas the left bay accepts a sampling plug-in. | The 7S12 has two bays for [[:Category:7000 and 3S series sampling heads|S-series plug-in modules ("heads")]]. The right bay accepts a pulse generator or a trigger recognizer plug-in, whereas the left bay accepts a sampling plug-in. | ||
The typical configuration is to have an [[S-6]] on the left and an [[S-52]] on the right for time domain reflectometry, or | The typical configuration is to have an [[S-6]] on the left and an [[S-52]] on the right for time domain reflectometry, or a sampling head like the [[S-4]] on the left and an [[S-53]] on the right as a generic sampler. | ||
The 7S12 can also control an optional [[7S11]] through its side contacts, adding a second input channel. | The 7S12 can also control an optional [[7S11]] through its left side contacts, adding a second input channel. | ||
Y axis can be scaled in voltage (mV) or distance (ρ) units, X axis in time or distance. | Y axis can be scaled in voltage (mV) or distance (ρ) units, X axis in time or distance. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Sweep modes | Single / Repetitive / Manual / External input}} | {{Spec | Sweep modes | Single / Repetitive / Manual / External input}} | ||
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==Links== | ==Links== | ||
* | * [[Media:062-1244-00.pdf | Tektronix 062-1244-00: Time-Domain Reflectometry Measurement Concepts]], James A. Strickland, 1969. pages. PDF, OCR, 6.2 MB | ||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/7S12.htm Tek 7S12 | * [[Media:Service Scope 45 Aug 1967.pdf | Service Scope No. 45, August 1967 - Time-Domain Reflectometry Theory]] | ||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/7S12.htm Tek 7S12 @ amplifier.cd] | |||
* [http://www.barrytech.com/tektronix/tek7000/tek7s12.html Tek 7S12 @ barrytech.com] | |||
* [http://www.youtube.com/watch?v=btmrIN62iDc Evaluation of 7S12 performance (video)] | * [http://www.youtube.com/watch?v=btmrIN62iDc Evaluation of 7S12 performance (video)] | ||
* [http://www.perdrix.co.uk/7S12/index.htm#mozTocId226019 7S12 extender board by Dave Partridge] | * [http://www.perdrix.co.uk/7S12/index.htm#mozTocId226019 7S12 extender board by Dave Partridge] | ||
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<gallery> | <gallery> | ||
7s12-front.jpg | Front view without sampling head plug-ins | |||
7s12-s6-s52-f.jpg | Front view with [[S-6]] sampling head and [[S-52]] pulse generator | |||
7s12-s6-s52-7613.jpg | 7S12 TDR "self portrait" in [[7613]] storage mainframe | |||
7s12-7s11-1ghz-store.jpg | 7S12 as a sampler, displaying a 1 GHz sine using a [[S-6]] sampling head and [[S-53]] trigger recognizer, 2<sup>nd</sup> channel (top) on a [[7S11]] with [[S-4]] sampling head. | |||
</gallery> | </gallery> | ||
===Inside=== | ===Inside=== | ||
<gallery> | <gallery> | ||
7s12-left.jpg | Left side | |||
7s12-left-cover.jpg | Left side with cover. Side contacts to interface [[7S11]] are exposed. | |||
7s12-right.jpg | Right side | |||
7s12-top.jpg | Top view | |||
7s12-horizontal.jpg | Horizontal board | |||
7s12-vertical.jpg | Vertical board | |||
</gallery> | </gallery> | ||
===Measurements=== | ===Measurements=== | ||
====TDR==== | |||
<gallery> | <gallery> | ||
7s12-self-portrait.jpg | TDR "Self Portrait" — pulse reflected on S-6 "through" path (approx. 120 ps one way) | |||
7s12-s52-incident.jpg | 7S12 displaying the incident pulse from an S-52 (nom. < 25 ps) through an S-6 head (nom. < 30 ps). Displayed rise time ~35 ps confirms spec. | |||
7s12-5in.jpg | 7S12/S-6/S-52 displaying pulse reflection from ~ 5 in semi-rigid SMA cable. Stored display of two traces. Left trace: cable only, right trace: cable plus SMA-to-BNC adapter (~ 25 mm) | |||
7s12-reflected.jpg | 7S12/S-6/S-52 displaying reflected pulse from end of 5 in semi-rigid SMA cable. Stored display overlaying multiple traces, left to right: cable alone, SMA-to-BNC adapter added, BNC f-f adapter added, (cheap) 50 Ω terminator added. | |||
7s12-s52-pulse-1.jpg | Full pulse pattern of a 7S12/S-52 in real time (top trace) and sampled (bottom trace) shown simultaneously on [[7844]]. 7S12 trace at slowest possible sweep. | |||
7s12-s52-pulse-2.jpg | S-52 pulse in real time (top trace) and sampled (bottom trace) shown simultaneously on [[7844]]. Approximately equal time scales. | |||
</gallery> | |||
====Probe rise times==== | |||
<gallery> | |||
P6202-risetime-7s12-1ns.jpg | Rise time of a [[P6202]] 500 MHz FET probe measured on a 7S12 with [[S-52]] and [[S-4]] (in a [[7844]] mainframe), at 1 ns/Div | |||
P6202-risetime-7s12-100ps.jpg | Rise time of a [[P6202]] 500 MHz FET probe measured on a 7S12 with [[S-52]] and [[S-4]] (in a [[7844]] mainframe), at 100 ps/Div | |||
P6230-rt1.jpg | P6230 Rise time, no ground lead | |||
P6230-rt2.jpg | P6230 Rise time, no ground lead, enlarged – 9.2 * 20 ps = 184 ps (equiv. to 1.9 GHz bandwidth) | |||
P6230-rt3.jpg | P6230 with "low inductance" ground lead – rise time 400 ps, bandwidth 875 MHz | |||
</gallery> | </gallery> | ||
====As a generic sampler==== | |||
<gallery> | |||
7s12-7s11-1ghz-nonstore.jpg | [[7S11]] with [[S-4]] and 7S12 with [[S-6]] and [[S-53]] displaying a 1 GHz sine in normal mode without storage. Sampling is evident. | |||
7s12-7s11-1ghz-store2.jpg | [[7S11]] with [[S-4]] and 7S12 with [[S-6]] and [[S-53]] displaying a 1 GHz sine in high-res mode with variable-persistence storage on a [[7613]]. | |||
</gallery> | |||
[[Category:7000 series combined plugins]] | [[Category:7000 series combined plugins]] | ||
[[Category:Sampling plugins]] | [[Category:Sampling plugins]] | ||
[[Category:Time-domain reflectometers]] | [[Category:Time-domain reflectometers]] | ||
Revision as of 01:53, 6 March 2017
The Tektronix 7S12 is a Time Domain Reflectometer / Sampler plug-in for 7000-series scopes. It occupies two mainframe plug-in bays (one vertical, one horizontal).
The 7S12 has two bays for S-series plug-in modules ("heads"). The right bay accepts a pulse generator or a trigger recognizer plug-in, whereas the left bay accepts a sampling plug-in.
The typical configuration is to have an S-6 on the left and an S-52 on the right for time domain reflectometry, or a sampling head like the S-4 on the left and an S-53 on the right as a generic sampler.
The 7S12 can also control an optional 7S11 through its left side contacts, adding a second input channel.
Y axis can be scaled in voltage (mV) or distance (ρ) units, X axis in time or distance.
Key Specifications
Sweep modes | Single / Repetitive / Manual / External input |
---|---|
With S-6 and S-52 |
|
Sweep modes |
|
Weight | 2.13 kg (4.7 lbs) |
Links
- Tektronix 062-1244-00: Time-Domain Reflectometry Measurement Concepts, James A. Strickland, 1969. pages. PDF, OCR, 6.2 MB
- Service Scope No. 45, August 1967 - Time-Domain Reflectometry Theory
- Tek 7S12 @ amplifier.cd
- Tek 7S12 @ barrytech.com
- Evaluation of 7S12 performance (video)
- 7S12 extender board by Dave Partridge
Pictures
-
Front view without sampling head plug-ins
-
7S12 TDR "self portrait" in 7613 storage mainframe
Inside
-
Left side
-
Left side with cover. Side contacts to interface 7S11 are exposed.
-
Right side
-
Top view
-
Horizontal board
-
Vertical board
Measurements
TDR
-
TDR "Self Portrait" — pulse reflected on S-6 "through" path (approx. 120 ps one way)
-
7S12 displaying the incident pulse from an S-52 (nom. < 25 ps) through an S-6 head (nom. < 30 ps). Displayed rise time ~35 ps confirms spec.
-
7S12/S-6/S-52 displaying pulse reflection from ~ 5 in semi-rigid SMA cable. Stored display of two traces. Left trace: cable only, right trace: cable plus SMA-to-BNC adapter (~ 25 mm)
-
7S12/S-6/S-52 displaying reflected pulse from end of 5 in semi-rigid SMA cable. Stored display overlaying multiple traces, left to right: cable alone, SMA-to-BNC adapter added, BNC f-f adapter added, (cheap) 50 Ω terminator added.
-
Full pulse pattern of a 7S12/S-52 in real time (top trace) and sampled (bottom trace) shown simultaneously on 7844. 7S12 trace at slowest possible sweep.
-
S-52 pulse in real time (top trace) and sampled (bottom trace) shown simultaneously on 7844. Approximately equal time scales.
Probe rise times
-
P6230 Rise time, no ground lead
-
P6230 Rise time, no ground lead, enlarged – 9.2 * 20 ps = 184 ps (equiv. to 1.9 GHz bandwidth)
-
P6230 with "low inductance" ground lead – rise time 400 ps, bandwidth 875 MHz