1S1: Difference between revisions

key specs added
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(key specs added)
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|series=500-series scopes  
|series=500-series scopes  
|type=1S1
|type=1S1
|summary=Sampling system
|summary=1 GHz sampling system
|image=Tek 1s1 front2.jpeg  
|image=Tek 1s1 front2.jpeg  
|caption=1S1 front view
|caption=1S1 front view
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to allow the use of high-impedance probes with the 50 Ω input of the 1S1 (at reduced bandwidth).
to allow the use of high-impedance probes with the 50 Ω input of the 1S1 (at reduced bandwidth).


{{MissingSpecs}}
{{BeginSpecs}}
{{Spec| Rise time            | 350 ps}}
{{Spec| Bandwidth            | 1 GHz }}
{{Spec| Trigger bandwidth    | 100 MHz (Norm/Auto trigger), 1 GHz (HF sync) }}
{{Spec| Vertical deflection  | 2 mV/div to 200 mV/div in 1−2−5 sequence }}
{{Spec| Sweep rate            | 50 µs/div to 1 ns/div in 1−2−5 sequence, magnifier up to ×100 }}
{{Spec| Input impedance      | 50 Ω }}
{{Spec| Output                | Front-panel, vertical 200 mV/div; horizontal 1 V/div into a high-impedance load }}
{{Spec| Maximum input        | 5 V peak }}
{{EndSpecs}}


==Operation==
==Operation==
The 1S1 can operate in normal self-swept mode or an external sweep signal can be applied to the 1S1.   
The 1S1 can operate in normal self-swept mode, or an external sweep signal can be applied to the 1S1.   
With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used  
With the 1S1's internal sweep disabled, the horizontal-in and vertical-out connections can be used  
so the 1S1 acts as a lookup table, a mapping of X to Y, a function.   
so the 1S1 acts as a lookup table, a mapping of X to Y, a function.  
   
The 661 also has this capability, in its "A vert/B horiz" mode, which is like X-Y mode for a sampler.   
The 661 also has this capability, in its "A vert/B horiz" mode, which is like X-Y mode for a sampler.   
In this mode, the horizontal-in voltage controls the time after the trigger event when the sample should be taken,  
In this mode, the horizontal-in voltage controls the time after the trigger event when the sample should be taken,  
and the vertical-out voltage corresponds to the voltage measured at that instant.   
and the vertical-out voltage corresponds to the voltage measured at that instant.   
This allows a waveform to be digitized using an arbitrarily slow DAC to generate the horizontal voltage  
This allows a waveform to be digitized using an arbitrarily slow DAC to generate the horizontal voltage  
and ADC to read the sampled output.  But perhaps more importantly, by setting a constant horizontal-in voltage,  
and ADC to read the sampled output.  But perhaps more importantly, by setting a constant horizontal-in voltage,  
it allows the output signal at one equivalent time instant to be processed in the time domain.   
it allows the output signal at one equivalent time instant to be processed in the time domain.   
For example, this allows the voltage to be low-pass filtered, so that it can be more accurately measured.   
For example, this allows the voltage to be low-pass filtered, so that it can be more accurately measured.   
The other reason why one might want a signal that consists of multiple sequential measurements  
The other reason why one might want a signal that consists of multiple sequential measurements  
of the same equivalent-time instant is that statistics can be calculated on these observations.   
of the same equivalent-time instant is that statistics can be calculated on these observations.