R&S RTO6, User Manual

Page: 1139 / 2677

Power analysis (option R&S RTO6-K31)
R&S
®
RTO6
1139 User Manual 1801.6687.02 ─ 05
Figure 19-1: Power diagram for sinusoidal signals
P = real power [W]
Q = reactive power [VAR]
S = complex power [VA]
φ
= phase angle between the current and the voltage sine waves [°]
The power results are defined as follows:
Result Unit Formula Description
Power factor, P
Factor
- P
Factor
= |P| / |S| Measure of the system effi-
ciency. The value varies
between -1 and 1.
Phase,
φ
°
φ
= acos (P
Factor
) Phase angle between the cur-
rent and the voltage sine
waves.
Real power, P W P = V
INSTANTENEOUS
∙
I
INSTANTENEOUS
(averaged over N cycles)
Energy of the system that can
be used to do work.
Reactive power, Q VAR
(Volt
‑
Ampere
reactive)
Q = |S| sin
φ
Power flow that is temporally
stored in a system because of
the inductive and capacitive
elements.
Apparent power, |S| VA |S| = V
RMS
∙
I
RMS
(averaged over N cycles)
|S| is the magnitude of the
vector sum of real and reac-
tive power (the complex
power S).
The following remote commands are used for handling the measurement results:
●
POWer:QUALity:RESult:CURRent:CREStfactor?
on page 2528
●
POWer:QUALity:RESult:CURRent:FREQuency?
on page 2528
●
POWer:QUALity:RESult:CURRent:PEAK?
on page 2528
●
POWer:QUALity:RESult:CURRent:RMS?
on page 2528
●
POWer:QUALity:RESult:POWer:APParent?
on page 2528
●
POWer:QUALity:RESult:POWer:PFACtor?
on page 2528
Input