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2.4 Input Ranges
The USBscope50 supports 3 settings on its input attenuator.
The ranges at the BNC input depend on the type of scope probe
used:
A “x1” probe causes no signal attenuation and will result in nominal
full-scale input ranges of +/-0.3V, +/-3V and +/-30V. The
bandwidth of x1 scope probes is generally quite low (10’s of MHz)
and the circuit being measured will see a 1MegOhm load.
A “x10” probe causes a factor of ten signal attenuation and will
result in nominal full-scale input ranges of +/-3V, +/-30V and +/-
300V. The bandwidth of x10 scope probes is generally high (100’s
of MHz) and the circuit being measured will see a 10MegOhm load.
The USBscope50 also supports AC and DC coupling:
In AC coupling mode, the input signal is passed through a capacitor
prior to attenuation. The input bandwidth is around 3.4Hz up to
75MHz.
In DC coupling mode, the capacitor is bypassed and the bandwidth
is DC up to 75MHz.
Elan Digital Systems Ltd. 14 USBscope50 USER’S GUIDE Iss5