7S12: Difference between revisions

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7S12 (view source)

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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.
* [[Media:062-1244-00.pdf | Tektronix 062-1244-00: Time-Domain Reflectometry Measurement Concepts]], James A. Strickland, 1969. pages. PDF, OCR, 6.2 MB
* [[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.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.barrytech.com/tektronix/tek7000/tek7s12.html Tek 7S12 @ barrytech.com]
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<gallery>
<gallery>
File:7s12-front.jpg | Front view without sampling head plug-ins
7s12-front.jpg | Front view without sampling head plug-ins
File:7s12-s6-s52-f.jpg | Front view with [[S-6]] sampling head and [[S-52]] pulse generator
7s12-s6-s52-f.jpg | Front view with [[S-6]] sampling head and [[S-52]] pulse generator
File:7s12-s6-s52-7613.jpg | 7S12 TDR "self portrait" in [[7613]] storage mainframe
7s12-s6-s52-7613.jpg | 7S12 TDR "self portrait" in [[7613]] storage mainframe
File: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.
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>
File:7s12-left.jpg | Left side
7s12-left.jpg | Left side
File:7s12-left-cover.jpg | Left side with cover.  Side contacts to interface [[7S11]] are exposed.
7s12-left-cover.jpg | Left side with cover.  Side contacts to interface [[7S11]] are exposed.
File:7s12-right.jpg | Right side
7s12-right.jpg | Right side
File:7s12-top.jpg | Top view
7s12-top.jpg | Top view
File:7s12-horizontal.jpg | Horizontal board
7s12-horizontal.jpg | Horizontal board
File:7s12-vertical.jpg | Vertical board
7s12-vertical.jpg | Vertical board
</gallery>
</gallery>
===Measurements===
===Measurements===
====TDR====
====TDR====
<gallery>
<gallery>
File:7s12-self-portrait.jpg | TDR "Self Portrait" — pulse reflected on S-6 "through" path (approx. 120 ps one way)
7s12-self-portrait.jpg | TDR "Self Portrait" — pulse reflected on S-6 "through" path (approx. 120 ps one way)
File: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-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.
File: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)  
7s12-5in.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)  
File: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-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.  
File: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-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.
File: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.
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>
</gallery>


====Probe rise times====
====Probe rise times====
<gallery>
<gallery>
File: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-7s12-1ns.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
File: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
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
File:P6230-rt1.jpg | P6230 Rise time, no ground lead
P6230-rt1.jpg | P6230 Rise time, no ground lead
File:P6230-rt2.jpg | P6230 Rise time, no ground lead, enlarged – 9.2 * 20 ps = 184 ps (equiv. to 1.9 GHz bandwidth)
P6230-rt2.jpg | P6230 Rise time, no ground lead, enlarged – 9.2 * 20 ps = 184 ps (equiv. to 1.9 GHz bandwidth)
File:P6230-rt3.jpg | P6230 with "low inductance" ground lead – rise time 400 ps, bandwidth 875 MHz
P6230-rt3.jpg | P6230 with "low inductance" ground lead – rise time 400 ps, bandwidth 875 MHz
</gallery>
</gallery>


====As a generic sampler====
====As a generic sampler====
<gallery>
<gallery>
File: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-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.
File: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]].
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>
</gallery>


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