Datasheet

Version 05.00, December 2017
26 Rohde & Schwarz R&S
®
RTM Oscilloscope
R&S
®
RTM-K31
Power analysis
General description
The R&S
®
RTM-K31 power analysis option extends the R&S
®
RTM firmware with
measurement functionality focused on switched mode power supplies (SMPS) and
DC/DC converters.
Input
quality
evaluation of power quality at an
AC input; measures real power, apparent
power, reactive power, power factor and
phase angle of power, frequency, crest
factor, RMS of voltage and current
harmonics
measures up to the 334
th
harmonic of the
incoming line frequency; precompliance
checking for IEC 61000-3-2 (A, B, C, D),
RTCA DO-160, MIL-STD-1399, max. limit
checks
inrush current
measures peak inrush current and
electrical charge within up to 3
configurable measurement zones to
analyze the inrush and post-inrush
behavior
consumption
long term measurement of consumed
power and energy to analyze
nonperiodical signals of e.g. standby
devices
Switching/control loop
slew rate
The minimum and maximum slew rate of
current or voltage is measured at start and
end of the switching cycle.
modulation
measures modulation of switching
frequency, duty cycle (±) and pulse width
dynamic on-resistance
measures resistance of the switching
transistor(s) in active state
Power path
efficiency
measures input and output power to
calculate the efficiency of a power device
switching loss
measures switching loss and conduction
loss of a power device
safe operating area (SOA)
checks violation of voltage and current
limits in which a power device can operate
without damage; current versus voltage
view (linear or log); violation mask is user-
defined and editable in linear and log-log
views; save/load of masks; export of mask
violation data
turn on/off time
measures relationship between AC and
DC current, when turning SMPS off and on
Output
ripple
measures AC components of output
voltage or current, AC RMS, mean, period,
frequency, duty cycles, min./max./peak-to-
peak amplitude
spectrum
FFT analysis of output, measurement of
frequency peaks
transient response
This measurement captures the device
behavior between the event of load
changes and stabilization;
includes peak (voltage, time), settling time,
rise time, overshoot and delay
Deskew
automated
By using the R&S
®
RT-ZF20 probe deskew
and calibration test fixture and
Rohde & Schwarz voltage and current
probes, the skew between the signals is
compensated automatically.
Zero offset
automated
automatic compensation of input offset
Reporting
Report data can be saved for every measurement. Report generation using user-
selected test results from historical and current tests. Put repeated and/or different
measurements in one report. R&S
®
Oscilloscope Report Creator can be downloaded
from Rohde & Schwarz website free-of-charge.