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Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the E11-1000's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

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Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	21.9mV	5.0mV	6.8mV	11.2mV	Pass
20% Load	17.6mV	5.0mV	6.7mV	10.3mV	Pass
30% Load	17.9mV	6.3mV	7.7mV	13.5mV	Pass
40% Load	19.5mV	6.9mV	8.5mV	17.0mV	Pass
50% Load	21.1mV	7.9mV	10.7mV	18.2mV	Pass
60% Load	23.8mV	9.5mV	13.9mV	13.6mV	Pass
70% Load	26.2mV	11.8mV	15.1mV	15.0mV	Pass
80% Load	29.4mV	11.8mV	17.3mV	15.7mV	Pass
90% Load	31.8mV	11.7mV	18.2mV	16.3mV	Pass
100% Load	34.5mV	13.4mV	19.5mV	18.6mV	Pass
110% Load	37.2mV	14.4mV	19.9mV	20.5mV	Pass
Cross-Load 1	18.6mV	8.7mV	11.9mV	7.3mV	Pass
Cross-Load 2	34.5mV	11.1mV	15.6mV	17.3mV	Pass

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Ripple suppression is very good, especially on the minor rails. FSP does well here.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.