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1.2 Channel Input Specifications
Input Protection
The input amplifiers are designed to accept signals below the absolute maximum level shown in the
table.
Mezzanine Front-end
The front-end electronics are all mounted on a removable mezzanine card. In the event of accidental
damage or as components fatigue over time (e.g. relays in high duty cycle automated testing
applications), the mezzanine card allows for fast and efficient replacement.
Bandwidth and Rise Time
The bandwidth specification indicates the frequency at which an input signal will be attenuated by 3 dB
(approximately 30% loss of amplitude).
The bandwidth also has an impact on the minimum rise and fall times that can be passed through the
front-end electronics. A pulse with a very sharp edge will be observed to have a minimum rise timeT
determined by the front-end electronics. In general a pulse with a given 10-90% rise time T
be observed with a lower value given by:
2
T
=T
10-90
10-90real
where T
(ns)≈0.35/BW(GHz)
min
Vertical Resolution
The U5309A ADC Card uses a 8-bit ADC giving 256 levels at each input full scale range.
10
2
2
+T
min
min
will
10-90real
U5309A User's Manual
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