Tektronix MSO64 — измерение PSRR и импеданса: алгоритмы и методы [595/628]

Tektronix MSO46 [595/628] Power supply rejection ratio measurement algorithm
where:
V
out
is the amplitude of the input signal
V
in
is the input signal
Phase for Bode is the time shift between the output and input signals.
Power supply rejection ratio measurement algorithm
Power Supply Rejection Ratio (PSRR) measures both the modulated input and output AC voltage levels and then computes the
rejection ratio as 20 log (V
in
/V
out
) at each frequency within the swept band.
Impedance measurement algorithm
Impedance is computed as the channel ratio of V
out
/V
in
for each frequency.
DDR Amplitude Measurement algorithms
DDR measurements require option 6-DBDDR3 (6 Series MSO instruments only).
AOS (DDR)
AOS is the total area of the signal above specified reference level.
AOS Per tCK (DDR)
AOS Per tCK is the total area of the signal that crosses the specified reference level, calculated over consecutive periods. It is
applicable to clock and address/command waveforms.
AOS Per UI (DDR)
AOS Per UI is the total area of the signal that crosses specified reference level, calculated over consecutive unit intervals. It is
applicable to data and data strobe waveforms.
AUS (DDR)
AUS is the total area of the signal below specified reference level.
AUS Per tCK (DDR)
AUS Per tCK is the total area of the signal that crosses the specified reference level, calculated over consecutive periods. It is
applicable to clock and address/command waveforms.
AUS Per UI (DDR)
AUS Per UI is the total area of the signal that crosses specified reference level, calculated over consecutive unit intervals. It is
applicable to data and data strobe waveforms.
Measurement algorithms
4/5/6 Series MSO Help 565

Содержание

Узнайте о методах измерения PSRR и импеданса, а также алгоритмах для анализа сигналов. Подробности о расчетах и применении в различных частотных диапазонах.

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