7T11: Difference between revisions

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7T11 (view source)

Revision as of 07:48, 4 October 2014

1,195 bytes added ,  4 October 2014
specs
(better pic)
(specs)
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{{Plugin Sidebar 2|
{{Plugin Sidebar 2|
title=Tektronix 7T11|
title=Tektronix 7T11 |
summary=Sampling Sweep Unit|
summary=Sampling Sweep Unit|
image=7t11a.jpg |
image=7t11a.jpg |
caption=Tektronix 7T11 sampling sweep unit |  
caption=Tektronix 7T11A sampling sweep unit |  
introduced=1970 |
introduced=1970 |
discontinued=1990 |
discontinued=1990 |
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The '''Tektronix 7T11''' is a time base plug-in for the [[Main_Page#7000_Series|7000 mainframe family]].  
The '''Tektronix 7T11''' is a time base plug-in for the [[Main_Page#7000_Series|7000 mainframe family]].  
It was specially designed to build a [[sampling oscilloscope]] configuration together with the [[7S11]] including one of the sampling heads. The fastest sweep is 10 ps/div and lowest jitter is 10 ps, depending on actual settings.
It was specially designed to build a [[sampling oscilloscope]] configuration together with the [[7S11]]  
sampler and one of the sampling head plug-ins.  


Trigger bandwidth is 500 MHz from internal and 1 GHz from external trigger sources.  
Because the 7T11 and 7S11 have direct interconnections side by side, they work also
Additionally, there is an internal 200 MHz oscillator with analog trigger count down,  
in slow mainframes. The 7T11 supports up to two 7S11 for dual channel or X–Y operation.
which can be synchronized from external signals up to 14 GHz.
 
==Specifications==
{{BeginSpecs}}
{{Spec | Sweep rate | 50 μs/Div to 10 ps/div, variable speed-up ×2.5 on all ranges (i.e. down to 4 ps/Div) }}
{{Spec | Trigger bandwidth   | 500 MHz internal, 1 GHz from external trigger sources, 14 GHz in HF Sync mode }}
{{Spec | Trigger sensitivity |
* ×1 internal: 125 mV to 1 V<sub>p-p</sub>, 5 kHz to 500 MHz
* ×10 internal: 12.5 mV to 1 V<sub>p-p</sub>, 5 kHz to 50 MHz
* ×1 external 50 Ω: 12.5 mV to 2 V<sub>p-p</sub>, DC to 1 GHz
* ×10 external 50 Ω: 1.25 mV to 2 V<sub>p-p</sub>, 1 kHz to 50 MHz
* ×1 external 1 MΩ: 12.5 mV to 2 V<sub>p-p</sub>, DC to 100 MHz
* ×10 external 1 MΩ: 1.25 mV to 2 V<sub>p-p</sub>, 1 kHz to 50 MHz
* HF Sync mode: 10 mV to 500 mV<sub>p-p</sub> @ 1 GHz, 200 mV to 500 mV<sub>p-p</sub> @ 12.4 GHz
}}
{{Spec | Input impedance (Trig Input) | selectable, 1 MΩ / 50 Ω }}
{{Spec | Max. input  |
* 1 MΩ: 100 V DC or P-P to 1 kHz, above 1 KHz derate at -6 dB/octave down to 5 V<sub>p-p</sub>
* 50 Ω: 2 V (DC + peak AC)
}}
{{Spec | Jitter              |
* Sequential mode:< 10 ps at fastest sweep, < 0.4 Div otherwise
* Random mode: < 30 ps at fastest sweep, 1 Div otherwise
* HF Sync mode: < 20 ps with 12.4 GHz, 200 mV<sub>p-p</sub> signal
}}
{{EndSpecs}}
 
==Operation==


Due its sampling principle (so called undersampling), the 7T11 can only be used on  
Due its sampling principle (so called undersampling), the 7T11 can only be used on  
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so the 7T11 needs an external pre-trigger if there are random, high-jitter signals  
so the 7T11 needs an external pre-trigger if there are random, high-jitter signals  
or if the original signal triggered onto needs to be observed. In the special case of  
or if the original signal triggered onto needs to be observed. In the special case of  
a periodic signal with low jitter, a [[random sampling]] mode can be used so that the signal triggered on can be observed. In this case, an internal PLL locks to the signal and generates an internal pre-trigger.  
a periodic signal with low jitter, a [[random sampling]] mode can be used so that the  
signal triggered on can be observed. In this case, an internal PLL locks to the signal
and generates an internal pre-trigger.  
 
To display the triggering event without slowing the sweep rate enough to see the next
pulse, the input signal can be delayed by using the [[7M11]] analog delay line plug-in. 


If only bandwidths of up to 3 GHz are needed, single events can be observed directly be using the [[7M11]] analog delay line plug-in.  ''(This statement should be clarified.  It seems to imply that a single event can be plotted using a 7T11.)''
X-Y operation is possible up to 14 GHz if one 7S11 resides in the A-horizontal slot
of a 4-slot mainframe.


Manual or external sweep is possible to connect a slow pen plotter.  
Manual or external sweep is possible to connect a slow pen plotter.  


Because the 7T11 and 7S11 have direct interconnections side by side, they work also in slow mainframes. The 7T11 supports up to two 7S11 and allows also X–Y operation up to 14 GHz if one 7S11 resides in the A-horizontal slot.
Additionally, there is an internal 200 MHz tunnel diode oscillator,  
which can be synchronized from external signals up to 14 GHz.  This
oscillator in turn drives a 10 MHz tunnel diode oscillator that provides
the internal trigger signal.


The 7T11 uses a [[BSM connector]] for pulse output on the front panel.
The 7T11 uses a [[BSM connector]] for pulse output on the front panel.


Note the 7T11 does not work in a [[7854]] mixed-mode scope while the updated 7T11A does.  A 7T11 can be [http://www.perdrix.co.uk/7T11Conversion/index.htm field upgraded to 7T11A].
Note the 7T11 does not work in a [[7854]] mixed-mode scope while the updated 7T11A does.   
A 7T11 can be [http://www.perdrix.co.uk/7T11Conversion/index.htm field upgraded to 7T11A].
   
   
==Specifications==
[[Category:Specifications needed]] ''please add''
==Links==
==Links==
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/7T11A.htm 7T11A page @ amplifier.cd]
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_special/7T11A.htm Tek 7T11A page @ amplifier.cd]
* http://www.barrytech.com/tektronix/tek7000/tek7t11.html
* [http://www.barrytech.com/tektronix/tek7000/tek7t11.html Tek 7T11 page @ barrytech.com]


==Pictures==
==Pictures==
Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/13736"

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