ACCESSORY FOR USE IN TEST AND MEASUREMENT INSTRUMENT AND METHOD FOR TEST AND MEASUREMENT INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To make it possible to measure signals to be measured of small amplitudes in a high sensitivity setting, without saturating an oscilloscope.SOLUTION: A probe 201 is used with an oscilloscope 208 and receives an input signal from a device under test (DUT) 202. A clamp control unit 210 applies clamping/limiting levels 212, 214 to the input signal via diodes 213, 215, respectively. A buffer 216 supplies a clamped/limited output signal to the oscilloscope 208. When the vertical sensitivity of the oscilloscope 208 exceeds a predetermined threshold value, the clamp control unit 210 may be controlled from the oscilloscope 208 to enable the clamping/limiting levels so as to prevent the front end of the oscilloscope 208 from being driven to a saturation condition.SELECTED DRAWING: Figure 2