Tektronix MSO64 User Manual

Output analysis algorithms
Line Ripple algorithm. Line Ripple measures the voltage of a power supply which has been derived from an alternating current
(AC) source, displaying the results as a peak-to-peak value and RMS value. In Line Ripple measurements, the time base is set to
display three cycles of 50 Hz or 60 Hz in the input waveform.
Depending upon the coupling type you select, the application sets the required offset and adjusts the vertical scale to the
appropriate sensitivity.
Switching Ripple algorithm. Switching Ripple measures the voltage ripple at operating the specified power supply switching
frequency, up to 1 MHz.
Efficiency algorithm. Efficiency measures the ratio of output power to input power for a power conversion circuit. The
measurement supports three outputs, the maximum and efficiency is computed at each output. If there are more than one output,
then the total efficiency value will be computed. You can configure AC/DC type at input and output sides.
NOTE. This measurement uses a minimum of four sources and a maximum of eight sources. Two sources are used to measure
the input voltage and current to the power supply. Two to six sources are used to measure the power supply output voltage and
current.
Math is used to compute Input Power waveform using V * I equation. Computation happens over an exact integer number of
cycles to get an accurate result, that is, from the first zero crossing to the last zero crossing.
Math calculates the Input Power, using
Similarly another math calculates the Output Power using V * I at the output side
Power Efficiency = Output Power / Input Power
NOTE.
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If more cycles are captured, then the power solution will automatically consider all the integral cycles, starting from first (mid)
crossing to the last valid (mid) crossing.
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For multiple outputs, the total efficiency is computed as the ratio of input power to the sum of output(s) power. The total
efficiency is expected to be within 100%, since all the outputs are from a same input power. If the efficiency is greater than
100 %, then the application displays a warning message.
Turn On Time. Turn On Timeis the time taken to get the steady state output voltage of the power supply after the input voltage
is applied.
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The Maximum Voltage value should be greater than the Input Trigger level.
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The Maximum Voltage level value sets the waveform vertical settings to approximately one-fourth of the specified level.
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The Maximum Time field sets the horizontal units so as to display the entire time in which the output is supposed to reach
zero.
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The Input Trigger level is set based on the 50 % level of the input channel.
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Turn Off Time sets the trigger slope to rising edge.
Measurement algorithms
MSO54, MSO56, MSO58, MSO58LP, MSO64 Help 475

Tektronix MSO64 Specifications

General

Brand	Tektronix
Model	MSO64
Category	Test Equipment
Language	English