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IM DL850E-01EN
Bandwidth (Pass Band)
When the filter band is set to Band-Pass, select the bandwidth. The bandwidth options vary depending on the
center frequency that you have set. For details on the options, see the appendix in the Real Time Math (/G3
option) User’s Manual, IM DL850E-51EN.
Interpolation On and Off (Interpolate)
Select whether to perform data interpolation. Up to 10 M samples of data can be interpolated from the data of
waveforms that pass through the real time math IIR filter. The interpolation method is linear interpolation.
• ON: Data is interpolated.
• OFF: Data is not interpolated.
Demodulation of the Pulse Width Modulated Signal (PWM)
Integrates a pulse width modulation signal and demodulates it to an analog signal. This function can be used on
models with firmware version 2.00 and later.
Math Source Waveforms (Source)
The options are the same as were described above for basic arithmetic.
Period of the Pulse Width Modulated Signal (Period)
Set the period of the pulse width modulated signal. The pulse width modulation signal is repeatedly integrated
over the set period and demodulated to an analog signal.
Selectable range: 0.1 μs to 5000.0 μs, Default value: 0.1 μs, Resolution: 0.1 μs.
Reactive Power (Reactive Power(Q))
Calculates the reactive power from apparent power and effective power.
To calculate the reactive power, you must use the real time math feature to calculate the apparent power and
effective power by following the procedure below. This function can be used on models with firmware version 2.05
and later.
Apparent Power Calculatiom
1. Calculate the RMS voltage and current (RMS) that are used to derive the reactive power.
2. Take the product of the RMS voltage and current (S1*S2) that were calculated in step 1. The result is the
apparent power.
Effective Power Calculation
Calculate the effective power of the RMS voltage and current (Power) that are used to derive the reactive
power.
Apparent Power (Apparent Power(S))
Select the real time math channel (RMath channel) used to calculate the apparent power.
Effective Power (Effective Power(P))
Select the real time math channel (RMath channel) used to calculate the effective power.
2 Vertical Axis