11-6
IM DL850E-01EN
Menu Item Example
Description
TF-
TF-MAG(C1, C2)
Displays the magnitude of the transfer function of the two specified waveforms
TF-LOGMAG(C1, C2) Displays the logarithmic magnitude of the transfer function of the two specified
waveforms
TF-PHASE(C1, C2)
Displays the phase of the transfer function of the two specified waveforms
TF-REAL(C1, C2)
Displays the real part of the transfer function of the two specified waveforms
TF-IMAG(C1, C2)
Displays the imaginary part of the transfer function of the two specified waveforms
CH-
CH-MAG(C1, C2)
Displays the magnitude of the coherence function of the two specified waveforms
Constants
Menu Item
Description
K1 to K8
0 to 9
−
Exp
E notation. Selectable range: −30 to +30
Use this constant to enter values in E notation (1E+3 = 1000, 2.5E−3 = 0.0025).
It is displayed as “E” in expressions to distinguish it from the “EXP” operator.
Automated Measurement Values of Waveform Parameters (Measure)
You can use the automated measurement values of waveform parameters in expressions. The DL850E/
DL850EV cannot retrieve waveform parameter values when the display of the measurement source waveform is
off.
Combinations of Operators That Are Not Allowed
• An expression cannot be used in another expression with a smaller number.
Example: Math5 = M6 + M3
• Expressions containing only constants (K1 to K8) are not allowed.
Example: Math5 = K1 + K8
• An expression can contain only up to two FILT1 or FILT2 functions.
Example: FILT1(C1)+FILT1(C2)+FILT1(C3)
• A single FFT expression can contain only one operator.
Example: PS−MAG(C1+C2)
• Additional computations cannot be performed on FFT results.
Example: PS−MAG(C1)+C2
• Additional computations cannot be performed on pulse width computations.
Example: PWHH(C1)+C2
• Only one operator can be used in a single phase-shift computation, pulse-width computation, or binary-
conversion expression.
Example: SHIFT(C1+C2), BIN(C1−C2), PWHH(C1*C1)
If you want to perform an FFT, phase-shift, pulse-width, or binary-conversion computation on the computed
results of an expression such as C1+C2, create expressions like these: M1=C1+C2, M2=PS−MAG(M1).
Unit (Unit), Label (Label), and Turning the Display On and Off (Display)
These settings are the same as those for basic arithmetic.
Scaling Mode (Scaling Mode), Upper and Lower Limits (Upper/Lower), and Start and End Points (Start
Point/End Point)
11 Computation