Agilent 5991-3317EN Considerations in Making Small Signal Measurements - Application Brief c20141009 [3] free download

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Keysight Technologies Considerations in Making Small Signal Measurements Application Brief The ever-increasing demand for battery-powered mobile devices and more energy efficient green product development has triggered a rising demand for oscilloscope measurement solution that can accurately test and measure the small signals with higher accuracy. 02 | Keysight | Considerations in Making Small Signal Measurements - Application Brief Probing considerations Higher resolution and lower noise acquisition If you are measuring the small amplitude of ripple and noise When measuring small signals with a large dynamic range, you on your power rail or devices, you may need to use an oscillo- need a measurement resolution that is higher than the 8 bits scope at or near its more sensitive V/div setting. provided by conventional digitizing oscilloscopes. Rather than First, try using a probe with a lower attenuation ratio such resorting to a high-resolution digitizer or other measuring instru- as 1:1 probe, rather than using the standard passive probe ment, you can use the built-in high-resolution mode or averaging with 10:1 attenuation ratio that shipped with your instrument. mode on your oscilloscope to measure a parameter with a resolu- With a 10:1 probe, not only is the oscilloscope's base-line tion higher than 8 bits and lower noise. Each acquisition mode has noise floor increased by a factor of 10, but the minimum V/ pros and cons, but div setting of scope is also ten times higher than with a 1:1 probe. Use averaging acquisition mode when: