9-25
IM 701450-01E
9
Waveform Computation
Operators and Examples Computation
PS-
PS-MAG(C1) The amplitude of the specified waveform’s power spectrum
PS-LOGMAG(C1) The logarithmic amplitude of the specified waveform’s power spectrum
PSD-
PSD-MAG(C1) The amplitude of the specified waveform’s power spectrum
density
PSD-LOGMAG(C1) The logarithmic amplitude of the specified waveform’s power
spectrum density
CS-
CS-MAG(C1,C2) The amplitude of the two specified waveforms’ cross spectrum
CS-LOGMAG(C1,C2) The logarithmic amplitude of the two specified waveforms’ cross
spectrum
CS-PHASE(C1,C2) The phase of the two specified waveforms’ cross spectrum
CS-REAL(C1,C2) The real part of the two specified waveforms’ cross spectrum
CS-IMAG(C1,C2) The imaginary part of the two specified waveforms’ cross
spectrum
TF-
TF-MAG(C1,C2) The amplitude of the two specified waveforms’ transfer function
TF-LOGMAG(C1,C2) The logarithmic amplitude of the two specified waveforms’
transfer function
TF-PHASE(C1,C2) The phase of the two specified waveforms’ transfer function
TF-REAL(C1,C2) The real part of the two specified waveforms’ transfer function
TF-IMAG(C1,C2) The imaginary part of the two specified waveforms’ transfer
function
CH-
CH-MAG(C1,C2) The amplitude of the two specified waveforms’ coherence
function
DA8 Perform D/A conversion on the logic data of the specified number
DA8(Ly,Z8) of bits (1 to 8) of L1 (Pod A) or L2 (Pod B).
DA12 Perform D/A conversion on the logic data of the specified number
DA12(Lx,Ly,Z10) of bits (9 to 12) of L1 (Pod A) or L2 (Pod B).
C-DA Perform D/A conversion on the logic data of the specified number
C-DA(Lx,Ly,Z,W) of bits (1 to 12) of L1 (Pod A) or L2 (Pod B). The highest bit of Lx
(A0 or B0) is detected as the clock bit.
* DA8 and DA12 are available on DL7400 firmware version 2.16 or later. C-DA is available on
version 2.40 or later. See page 9-29 for details about the D/A conversion computation of the
logic data.
Waveform to Be Computed and Variables
The waveform to be computed and variables of Math1 and Math2 are as follows:
Waveform to Be Computed
Computation Name Waveform to Be Computed and Variables
Math1 DL7440: One channel from CH1 to CH4, Pod A and Pod B
DL7480: One channel from CH1 to CH8, Pod A and Pod B
Math2 DL7440: One channel from CH1 to CH4 , Pod A, Pod B, and Math1
DL7480: One channel from CH1 to CH8 , Pod A, Pod B, and Math1
• Pod A and Pod B are available only for models with logic input.
• In the equation set CH1 to CH8 as C1 to C8, Pod A as L1, Pod B as L2, and Math1 as M1.
• On the menu, CH1 to CH4 may be indicated as C1 to C4, Math1 as M1, Pod A as L1 and Pod
B as L2.
Variable T
This is the integrated value of the number of data points on the time axis. It is displayed
as a rising line on the screen. Using the variable T that is displayed in the equation
definition dialog box, you can define the integrated value of the number of data points
that increase with time in the equation.
9.9 Performing User-Defined Computation (Optional)
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