YOKOGAWA DL7440

9-24 IM 701450-01E
Explanation
This section describes the setup procedures in user-defined computation (option) mode.
For the setup procedure in normal computation mode, see sections 9.1 to 9.8.
Note
When user-defined computation is in progress, ∗ is displayed in the upper left corner of the
screen.
Turning ON/OFF the Computed Waveform Display
The display of the computed waveforms Math1 and Math2 can be turned ON/OFF
individually.
ON
Computed waveforms are displayed.
OFF
Computed waveforms are not displayed.
Operator
You can define equations by combining the following operators for Math1 and Math2.
Operators and Examples Computation
+, -, *, / C1+C2 Four arithmetical operations of the two specified waveforms
ABS ABS(M1) The absolute value of the specified waveform
SQRT SQRT(C2) The square root of the specified waveform
LOG LOG(C1) The logarithm of the specified waveform
EXP EXP(C1) The exponent of the specified waveform
NEG NEG(C1) The inversion of the specified waveform around level 0.
SIN SIN(T) The sine of the specified waveform
COS COS(C1) The cosine of the specified waveform
TAN TAN(C1) The tangent of the specified waveform
ATAN ATAN(C1,C2) The arc tangent of the two specified waveforms (a value within ±π)
PH PH(C1,C2) The phase difference between the two specified waveforms
DIF DIF(C1) The differentiation of the specified waveform
DDIF DDIF(C1) The secondary differentiation of the specified waveform
INTG INTG(C1) The integration of the specified waveform
IINTEG IINTEG(C1) The secondary integration of the specified waveform
BIN BIN(C1) The binary conversion of the specified waveform
P2 P2(C1) The square of the specified waveform
P3 P3(C1) The cube of the specified waveform
F1 F1(C1,C2)
C1
2
+ C2
2
of the specified waveform
F2 F2(C1,C2)
C1
2
– C2
2
of the specified waveform
FV FV(C1) The inverse of the PWHH of the pulse width
PWHH PWHH(M1) Pulse width computation from the rising edge to the next rising edge
PWHL PWHL(C2) Pulse width computation from the rising edge to the next falling edge
PWLH PWLH(C1) Pulse width computation from the falling edge to the next falling edge
PWLL PWLL(C1) Pulse width computation from the falling edge to the next rising edge
PWXX PWXX(C2) Pulse width computation from the rising or falling edge to the next
rising or falling edge
DUTYH DUTYH(C1) Positive (high) duty cycle within each cycle of the specified
waveform
DUTHL DUTYL(C1) Negative (low) duty cycle within each cycle of the specified
waveform
FILT1 FILT1(C1) Apply a filter to the specified waveform
FILT2 FILT2(C1) Apply a filter to the specified waveform
HLBT HLBT(C1) The Hilbert’s transform of the specified waveform
MEAN MEAN(C1) The moving average of the 10
th
order of the specified waveform
LS-
LS-MAG(C1) The amplitude of the specified waveform’s linear spectrum
LS-LOGMAG(C1) The logarithmic amplitude of the specified waveform’s linear spectrum
LS-PHASE(C1) The phase of the specified waveform’s linear spectrum
LS-REAL(C1) The real part of the specified waveform’s linear spectrum
LS-IMAG(C1) The imaginary part of the specified waveform’s linear spectrum
9.9 Performing User-Defined Computation (Optional)